./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 18:13:24,481 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:13:24,543 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:13:24,546 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:13:24,546 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:13:24,563 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:13:24,564 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:13:24,564 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:13:24,565 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:13:24,566 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:13:24,566 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:13:24,567 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:13:24,568 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:13:24,570 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:13:24,570 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:13:24,571 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:13:24,571 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:13:24,571 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:13:24,571 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:13:24,572 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:13:24,572 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:13:24,572 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:13:24,573 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:13:24,573 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:13:24,573 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:13:24,573 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:13:24,573 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:13:24,574 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:13:24,574 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:13:24,574 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:13:24,575 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:13:24,575 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:13:24,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:13:24,576 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:13:24,576 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:13:24,576 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:13:24,576 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:13:24,577 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:13:24,577 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:13:24,577 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:13:24,577 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:13:24,577 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:13:24,578 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:13:24,578 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:13:24,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:13:24,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:13:24,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:13:24,823 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:13:24,823 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:13:24,824 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 18:13:25,993 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:13:26,206 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:13:26,207 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 18:13:26,225 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1d991bcb/60fd8a1d08c54a3fa9030fbd4f00c001/FLAG3e8aeee3b [2024-06-21 18:13:26,245 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1d991bcb/60fd8a1d08c54a3fa9030fbd4f00c001 [2024-06-21 18:13:26,248 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:13:26,248 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:13:26,251 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 18:13:26,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:13:26,316 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:13:26,317 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:13:26,317 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:13:26,321 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:13:26,322 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:13:26" (1/2) ... [2024-06-21 18:13:26,322 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b32942e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:26, skipping insertion in model container [2024-06-21 18:13:26,323 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:13:26" (1/2) ... [2024-06-21 18:13:26,324 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@20b08b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:26, skipping insertion in model container [2024-06-21 18:13:26,325 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:13:26" (2/2) ... [2024-06-21 18:13:26,326 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b32942e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:26, skipping insertion in model container [2024-06-21 18:13:26,326 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:13:26" (2/2) ... [2024-06-21 18:13:26,327 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:13:26,351 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:13:26,352 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ! multithreaded || (((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) [2024-06-21 18:13:26,352 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ! multithreaded || (((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) [2024-06-21 18:13:26,352 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ! multithreaded || (((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) [2024-06-21 18:13:26,353 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:13:26,353 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-21 18:13:26,387 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:13:26,691 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:13:26,702 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:13:26,812 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:13:26,846 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:13:26,847 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:26 WrapperNode [2024-06-21 18:13:26,847 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:13:26,848 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:13:26,848 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:13:26,848 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:13:26,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:26" (1/1) ... [2024-06-21 18:13:26,882 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:26" (1/1) ... [2024-06-21 18:13:26,911 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-21 18:13:26,911 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:13:26,912 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:13:26,912 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:13:26,912 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:13:26,920 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:26" (1/1) ... [2024-06-21 18:13:26,921 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:26" (1/1) ... [2024-06-21 18:13:26,923 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:26" (1/1) ... [2024-06-21 18:13:26,933 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 18:13:26,933 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:26" (1/1) ... [2024-06-21 18:13:26,933 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:26" (1/1) ... [2024-06-21 18:13:26,937 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:26" (1/1) ... [2024-06-21 18:13:26,938 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:26" (1/1) ... [2024-06-21 18:13:26,940 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:26" (1/1) ... [2024-06-21 18:13:26,941 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:26" (1/1) ... [2024-06-21 18:13:26,945 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:13:26,955 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:13:26,955 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:13:26,955 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:13:26,956 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:26" (1/1) ... [2024-06-21 18:13:26,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:13:26,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:13:26,987 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 18:13:27,003 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 18:13:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:13:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:13:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:13:27,058 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:13:27,058 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:13:27,058 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:13:27,058 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:13:27,058 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:13:27,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:13:27,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:13:27,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:13:27,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:13:27,060 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 18:13:27,168 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:13:27,170 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:13:27,373 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:13:27,373 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:13:27,441 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:13:27,441 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:13:27,442 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:13:27 BoogieIcfgContainer [2024-06-21 18:13:27,442 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:13:27,444 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:13:27,444 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:13:27,446 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:13:27,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:13:26" (1/4) ... [2024-06-21 18:13:27,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f653dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:13:27, skipping insertion in model container [2024-06-21 18:13:27,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:13:26" (2/4) ... [2024-06-21 18:13:27,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f653dd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:13:27, skipping insertion in model container [2024-06-21 18:13:27,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:26" (3/4) ... [2024-06-21 18:13:27,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f653dd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:13:27, skipping insertion in model container [2024-06-21 18:13:27,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:13:27" (4/4) ... [2024-06-21 18:13:27,449 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 18:13:27,464 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:13:27,464 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 18:13:27,464 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:13:27,496 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:13:27,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 18:13:27,562 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 18:13:27,563 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:13:27,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:13:27,564 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 18:13:27,567 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 18:13:27,574 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:13:27,580 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;@444ac3a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:13:27,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 18:13:27,587 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:13:27,587 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:13:27,587 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:13:27,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:27,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:13:27,589 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 18:13:27,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:27,596 INFO L85 PathProgramCache]: Analyzing trace with hash 219069644, now seen corresponding path program 1 times [2024-06-21 18:13:27,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:27,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306104807] [2024-06-21 18:13:27,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:27,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:27,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:27,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306104807] [2024-06-21 18:13:27,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306104807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:27,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:27,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:13:28,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788131521] [2024-06-21 18:13:28,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:28,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:13:28,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:28,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:13:28,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:13:28,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-06-21 18:13:28,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:28,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:28,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-06-21 18:13:28,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:28,189 INFO L124 PetriNetUnfolderBase]: 438/757 cut-off events. [2024-06-21 18:13:28,191 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-21 18:13:28,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1500 conditions, 757 events. 438/757 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3812 event pairs, 278 based on Foata normal form. 1/713 useless extension candidates. Maximal degree in co-relation 1488. Up to 688 conditions per place. [2024-06-21 18:13:28,203 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 27 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 18:13:28,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 161 flow [2024-06-21 18:13:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:13:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:13:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-21 18:13:28,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7154471544715447 [2024-06-21 18:13:28,216 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 88 transitions. [2024-06-21 18:13:28,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 161 flow [2024-06-21 18:13:28,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:28,221 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 18:13:28,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 18:13:28,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 18:13:28,227 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 18:13:28,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:28,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:28,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:28,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:13:28,229 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 18:13:28,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:28,232 INFO L85 PathProgramCache]: Analyzing trace with hash 73227933, now seen corresponding path program 1 times [2024-06-21 18:13:28,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:28,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239305208] [2024-06-21 18:13:28,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:28,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:28,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:28,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239305208] [2024-06-21 18:13:28,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239305208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:28,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:28,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:13:28,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841722682] [2024-06-21 18:13:28,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:28,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:13:28,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:28,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:13:28,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:13:28,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:28,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:28,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:28,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:28,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:28,590 INFO L124 PetriNetUnfolderBase]: 528/890 cut-off events. [2024-06-21 18:13:28,591 INFO L125 PetriNetUnfolderBase]: For 184/211 co-relation queries the response was YES. [2024-06-21 18:13:28,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2061 conditions, 890 events. 528/890 cut-off events. For 184/211 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4488 event pairs, 282 based on Foata normal form. 6/884 useless extension candidates. Maximal degree in co-relation 2049. Up to 805 conditions per place. [2024-06-21 18:13:28,596 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 35 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-21 18:13:28,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 230 flow [2024-06-21 18:13:28,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:28,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:28,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-21 18:13:28,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6890243902439024 [2024-06-21 18:13:28,598 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 113 transitions. [2024-06-21 18:13:28,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 230 flow [2024-06-21 18:13:28,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:13:28,600 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 18:13:28,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 18:13:28,601 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 18:13:28,601 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 18:13:28,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:28,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:28,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:28,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:13:28,602 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 18:13:28,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:28,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1652603324, now seen corresponding path program 1 times [2024-06-21 18:13:28,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:28,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501391985] [2024-06-21 18:13:28,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:28,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:28,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:28,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501391985] [2024-06-21 18:13:28,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501391985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:28,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:28,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:28,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128789139] [2024-06-21 18:13:28,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:28,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:28,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:28,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:28,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:28,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:28,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:28,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:28,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:28,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:28,901 INFO L124 PetriNetUnfolderBase]: 522/878 cut-off events. [2024-06-21 18:13:28,901 INFO L125 PetriNetUnfolderBase]: For 534/599 co-relation queries the response was YES. [2024-06-21 18:13:28,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2319 conditions, 878 events. 522/878 cut-off events. For 534/599 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4394 event pairs, 214 based on Foata normal form. 9/877 useless extension candidates. Maximal degree in co-relation 2305. Up to 781 conditions per place. [2024-06-21 18:13:28,930 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 42 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-21 18:13:28,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 308 flow [2024-06-21 18:13:28,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-21 18:13:28,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-21 18:13:28,931 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 140 transitions. [2024-06-21 18:13:28,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 308 flow [2024-06-21 18:13:28,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 294 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:28,934 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 172 flow [2024-06-21 18:13:28,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-21 18:13:28,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-21 18:13:28,935 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 172 flow [2024-06-21 18:13:28,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:28,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:28,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:28,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:13:28,935 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 18:13:28,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:28,936 INFO L85 PathProgramCache]: Analyzing trace with hash 816716713, now seen corresponding path program 1 times [2024-06-21 18:13:28,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:28,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101832097] [2024-06-21 18:13:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:28,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:29,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:29,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101832097] [2024-06-21 18:13:29,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101832097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:29,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:29,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:29,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956716250] [2024-06-21 18:13:29,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:29,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:29,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:29,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:29,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:29,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:29,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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 18:13:29,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:29,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:29,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:29,296 INFO L124 PetriNetUnfolderBase]: 554/936 cut-off events. [2024-06-21 18:13:29,296 INFO L125 PetriNetUnfolderBase]: For 1135/1228 co-relation queries the response was YES. [2024-06-21 18:13:29,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2733 conditions, 936 events. 554/936 cut-off events. For 1135/1228 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4700 event pairs, 177 based on Foata normal form. 27/939 useless extension candidates. Maximal degree in co-relation 2718. Up to 733 conditions per place. [2024-06-21 18:13:29,303 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 49 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2024-06-21 18:13:29,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 70 transitions, 372 flow [2024-06-21 18:13:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:29,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:29,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-21 18:13:29,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6707317073170732 [2024-06-21 18:13:29,306 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 172 flow. Second operand 6 states and 165 transitions. [2024-06-21 18:13:29,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 70 transitions, 372 flow [2024-06-21 18:13:29,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 348 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:29,311 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 179 flow [2024-06-21 18:13:29,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-06-21 18:13:29,312 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-21 18:13:29,312 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 179 flow [2024-06-21 18:13:29,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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 18:13:29,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:29,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:29,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:13:29,314 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 18:13:29,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:29,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1439162230, now seen corresponding path program 1 times [2024-06-21 18:13:29,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:29,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698334203] [2024-06-21 18:13:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:29,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:29,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:29,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698334203] [2024-06-21 18:13:29,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698334203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:29,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:29,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:29,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629840007] [2024-06-21 18:13:29,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:29,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:29,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:29,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:29,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:29,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 18:13:29,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:29,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:29,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 18:13:29,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:29,651 INFO L124 PetriNetUnfolderBase]: 742/1300 cut-off events. [2024-06-21 18:13:29,652 INFO L125 PetriNetUnfolderBase]: For 1867/1867 co-relation queries the response was YES. [2024-06-21 18:13:29,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3691 conditions, 1300 events. 742/1300 cut-off events. For 1867/1867 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6774 event pairs, 259 based on Foata normal form. 4/1276 useless extension candidates. Maximal degree in co-relation 3675. Up to 1110 conditions per place. [2024-06-21 18:13:29,659 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 45 selfloop transitions, 9 changer transitions 0/63 dead transitions. [2024-06-21 18:13:29,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 359 flow [2024-06-21 18:13:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 18:13:29,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-21 18:13:29,662 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 179 flow. Second operand 5 states and 129 transitions. [2024-06-21 18:13:29,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 359 flow [2024-06-21 18:13:29,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 63 transitions, 336 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:29,668 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 221 flow [2024-06-21 18:13:29,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-21 18:13:29,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-21 18:13:29,671 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 221 flow [2024-06-21 18:13:29,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:29,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:29,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:29,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:13:29,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:29,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:29,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1023193463, now seen corresponding path program 1 times [2024-06-21 18:13:29,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:29,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909750690] [2024-06-21 18:13:29,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:29,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:29,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:29,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909750690] [2024-06-21 18:13:29,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909750690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:29,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:29,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:13:29,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190490881] [2024-06-21 18:13:29,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:29,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:13:29,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:29,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:13:29,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:13:29,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-06-21 18:13:29,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:29,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:29,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-06-21 18:13:29,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:29,868 INFO L124 PetriNetUnfolderBase]: 510/893 cut-off events. [2024-06-21 18:13:29,868 INFO L125 PetriNetUnfolderBase]: For 1951/2048 co-relation queries the response was YES. [2024-06-21 18:13:29,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2917 conditions, 893 events. 510/893 cut-off events. For 1951/2048 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4473 event pairs, 197 based on Foata normal form. 2/871 useless extension candidates. Maximal degree in co-relation 2899. Up to 797 conditions per place. [2024-06-21 18:13:29,873 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 37 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-21 18:13:29,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 343 flow [2024-06-21 18:13:29,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:13:29,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:13:29,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-21 18:13:29,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2024-06-21 18:13:29,874 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 221 flow. Second operand 3 states and 86 transitions. [2024-06-21 18:13:29,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 343 flow [2024-06-21 18:13:29,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 320 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:29,877 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 243 flow [2024-06-21 18:13:29,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=243, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2024-06-21 18:13:29,878 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-21 18:13:29,878 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 243 flow [2024-06-21 18:13:29,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:29,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:29,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:29,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:13:29,879 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 18:13:29,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:29,879 INFO L85 PathProgramCache]: Analyzing trace with hash 166448715, now seen corresponding path program 1 times [2024-06-21 18:13:29,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:29,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649228113] [2024-06-21 18:13:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:29,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:30,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:30,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649228113] [2024-06-21 18:13:30,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649228113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:30,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:30,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:30,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261514573] [2024-06-21 18:13:30,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:30,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:30,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:30,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:30,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:30,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:30,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:30,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:30,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:30,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:30,209 INFO L124 PetriNetUnfolderBase]: 922/1527 cut-off events. [2024-06-21 18:13:30,209 INFO L125 PetriNetUnfolderBase]: For 3425/3428 co-relation queries the response was YES. [2024-06-21 18:13:30,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4954 conditions, 1527 events. 922/1527 cut-off events. For 3425/3428 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7748 event pairs, 309 based on Foata normal form. 4/1525 useless extension candidates. Maximal degree in co-relation 4935. Up to 1327 conditions per place. [2024-06-21 18:13:30,219 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 57 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-21 18:13:30,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 80 transitions, 483 flow [2024-06-21 18:13:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:30,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:30,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 18:13:30,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 18:13:30,220 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 243 flow. Second operand 6 states and 153 transitions. [2024-06-21 18:13:30,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 80 transitions, 483 flow [2024-06-21 18:13:30,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 470 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-21 18:13:30,225 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 313 flow [2024-06-21 18:13:30,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=313, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-21 18:13:30,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-21 18:13:30,226 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 313 flow [2024-06-21 18:13:30,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:30,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:30,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:30,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:13:30,227 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:30,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:30,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1215598980, now seen corresponding path program 1 times [2024-06-21 18:13:30,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:30,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119622144] [2024-06-21 18:13:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:30,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:30,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:30,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119622144] [2024-06-21 18:13:30,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119622144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:30,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:30,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:30,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976943416] [2024-06-21 18:13:30,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:30,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:30,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:30,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:30,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:30,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:30,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 313 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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 18:13:30,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:30,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:30,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:30,467 INFO L124 PetriNetUnfolderBase]: 698/1188 cut-off events. [2024-06-21 18:13:30,467 INFO L125 PetriNetUnfolderBase]: For 3846/3908 co-relation queries the response was YES. [2024-06-21 18:13:30,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4327 conditions, 1188 events. 698/1188 cut-off events. For 3846/3908 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6039 event pairs, 239 based on Foata normal form. 3/1172 useless extension candidates. Maximal degree in co-relation 4305. Up to 1033 conditions per place. [2024-06-21 18:13:30,474 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 49 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-21 18:13:30,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 80 transitions, 553 flow [2024-06-21 18:13:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:30,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-21 18:13:30,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6536585365853659 [2024-06-21 18:13:30,476 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 313 flow. Second operand 5 states and 134 transitions. [2024-06-21 18:13:30,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 80 transitions, 553 flow [2024-06-21 18:13:30,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 514 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:30,482 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 386 flow [2024-06-21 18:13:30,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=386, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-21 18:13:30,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-21 18:13:30,482 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 386 flow [2024-06-21 18:13:30,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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 18:13:30,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:30,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:30,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:13:30,483 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 18:13:30,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:30,484 INFO L85 PathProgramCache]: Analyzing trace with hash 55122551, now seen corresponding path program 2 times [2024-06-21 18:13:30,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:30,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101182866] [2024-06-21 18:13:30,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:30,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:30,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:30,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101182866] [2024-06-21 18:13:30,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101182866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:30,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:30,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:30,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398814839] [2024-06-21 18:13:30,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:30,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:30,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:30,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:30,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:30,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:30,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 386 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:30,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:30,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:30,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:30,792 INFO L124 PetriNetUnfolderBase]: 954/1602 cut-off events. [2024-06-21 18:13:30,793 INFO L125 PetriNetUnfolderBase]: For 5891/5894 co-relation queries the response was YES. [2024-06-21 18:13:30,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5860 conditions, 1602 events. 954/1602 cut-off events. For 5891/5894 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8264 event pairs, 330 based on Foata normal form. 6/1601 useless extension candidates. Maximal degree in co-relation 5836. Up to 1375 conditions per place. [2024-06-21 18:13:30,801 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 64 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-06-21 18:13:30,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 639 flow [2024-06-21 18:13:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:30,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:30,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 18:13:30,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-21 18:13:30,803 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 386 flow. Second operand 6 states and 149 transitions. [2024-06-21 18:13:30,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 639 flow [2024-06-21 18:13:30,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 627 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 18:13:30,810 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 458 flow [2024-06-21 18:13:30,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=458, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-21 18:13:30,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-21 18:13:30,810 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 458 flow [2024-06-21 18:13:30,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:30,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:30,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:30,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:13:30,811 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 18:13:30,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:30,812 INFO L85 PathProgramCache]: Analyzing trace with hash 275636605, now seen corresponding path program 3 times [2024-06-21 18:13:30,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:30,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927217335] [2024-06-21 18:13:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:30,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:31,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:31,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927217335] [2024-06-21 18:13:31,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927217335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:31,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:31,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:31,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99945200] [2024-06-21 18:13:31,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:31,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:31,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:31,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:31,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:31,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:31,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 458 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:31,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:31,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:31,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:31,339 INFO L124 PetriNetUnfolderBase]: 946/1589 cut-off events. [2024-06-21 18:13:31,352 INFO L125 PetriNetUnfolderBase]: For 7188/7191 co-relation queries the response was YES. [2024-06-21 18:13:31,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6050 conditions, 1589 events. 946/1589 cut-off events. For 7188/7191 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8189 event pairs, 278 based on Foata normal form. 6/1588 useless extension candidates. Maximal degree in co-relation 6023. Up to 1304 conditions per place. [2024-06-21 18:13:31,361 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 62 selfloop transitions, 22 changer transitions 0/92 dead transitions. [2024-06-21 18:13:31,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 92 transitions, 706 flow [2024-06-21 18:13:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 18:13:31,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 18:13:31,377 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 458 flow. Second operand 6 states and 150 transitions. [2024-06-21 18:13:31,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 92 transitions, 706 flow [2024-06-21 18:13:31,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 92 transitions, 667 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:31,386 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 500 flow [2024-06-21 18:13:31,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=500, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-06-21 18:13:31,386 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-21 18:13:31,386 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 500 flow [2024-06-21 18:13:31,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:31,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:31,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:31,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:13:31,387 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:31,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:31,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1258856070, now seen corresponding path program 2 times [2024-06-21 18:13:31,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:31,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634563736] [2024-06-21 18:13:31,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:31,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:31,587 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 18:13:31,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:31,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634563736] [2024-06-21 18:13:31,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634563736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:31,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:31,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:31,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813742744] [2024-06-21 18:13:31,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:31,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:31,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:31,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:31,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:31,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:31,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 500 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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 18:13:31,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:31,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:31,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:31,797 INFO L124 PetriNetUnfolderBase]: 702/1201 cut-off events. [2024-06-21 18:13:31,816 INFO L125 PetriNetUnfolderBase]: For 7054/7127 co-relation queries the response was YES. [2024-06-21 18:13:31,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5027 conditions, 1201 events. 702/1201 cut-off events. For 7054/7127 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6170 event pairs, 242 based on Foata normal form. 3/1185 useless extension candidates. Maximal degree in co-relation 4998. Up to 1043 conditions per place. [2024-06-21 18:13:31,824 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 54 selfloop transitions, 18 changer transitions 0/84 dead transitions. [2024-06-21 18:13:31,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 680 flow [2024-06-21 18:13:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:31,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:31,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-06-21 18:13:31,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-21 18:13:31,828 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 500 flow. Second operand 4 states and 112 transitions. [2024-06-21 18:13:31,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 680 flow [2024-06-21 18:13:31,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 84 transitions, 609 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:31,854 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 481 flow [2024-06-21 18:13:31,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=481, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-06-21 18:13:31,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-21 18:13:31,855 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 481 flow [2024-06-21 18:13:31,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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 18:13:31,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:31,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:31,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:13:31,868 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:31,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:31,869 INFO L85 PathProgramCache]: Analyzing trace with hash 190543555, now seen corresponding path program 1 times [2024-06-21 18:13:31,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:31,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368076573] [2024-06-21 18:13:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:31,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:32,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:32,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368076573] [2024-06-21 18:13:32,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368076573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:32,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:32,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:32,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327362394] [2024-06-21 18:13:32,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:32,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:32,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:32,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:32,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:32,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:32,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 481 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:32,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:32,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:32,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:32,233 INFO L124 PetriNetUnfolderBase]: 710/1215 cut-off events. [2024-06-21 18:13:32,233 INFO L125 PetriNetUnfolderBase]: For 7902/7975 co-relation queries the response was YES. [2024-06-21 18:13:32,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5119 conditions, 1215 events. 710/1215 cut-off events. For 7902/7975 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6209 event pairs, 235 based on Foata normal form. 3/1199 useless extension candidates. Maximal degree in co-relation 5089. Up to 1031 conditions per place. [2024-06-21 18:13:32,240 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 53 selfloop transitions, 28 changer transitions 0/93 dead transitions. [2024-06-21 18:13:32,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 763 flow [2024-06-21 18:13:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:32,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:32,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 18:13:32,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-21 18:13:32,241 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 481 flow. Second operand 6 states and 157 transitions. [2024-06-21 18:13:32,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 763 flow [2024-06-21 18:13:32,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 93 transitions, 717 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:32,285 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 561 flow [2024-06-21 18:13:32,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=561, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-21 18:13:32,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-21 18:13:32,285 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 561 flow [2024-06-21 18:13:32,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:32,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:32,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:32,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:13:32,286 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:32,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:32,287 INFO L85 PathProgramCache]: Analyzing trace with hash 208654335, now seen corresponding path program 2 times [2024-06-21 18:13:32,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:32,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904770030] [2024-06-21 18:13:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:32,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:32,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:32,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904770030] [2024-06-21 18:13:32,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904770030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:32,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:32,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:32,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664094933] [2024-06-21 18:13:32,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:32,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:32,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:32,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:32,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:32,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:32,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 561 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:32,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:32,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:32,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:32,577 INFO L124 PetriNetUnfolderBase]: 718/1235 cut-off events. [2024-06-21 18:13:32,578 INFO L125 PetriNetUnfolderBase]: For 8575/8648 co-relation queries the response was YES. [2024-06-21 18:13:32,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5406 conditions, 1235 events. 718/1235 cut-off events. For 8575/8648 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6365 event pairs, 242 based on Foata normal form. 3/1219 useless extension candidates. Maximal degree in co-relation 5376. Up to 1055 conditions per place. [2024-06-21 18:13:32,585 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 58 selfloop transitions, 23 changer transitions 0/93 dead transitions. [2024-06-21 18:13:32,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 793 flow [2024-06-21 18:13:32,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:32,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-06-21 18:13:32,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6951219512195121 [2024-06-21 18:13:32,586 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 561 flow. Second operand 4 states and 114 transitions. [2024-06-21 18:13:32,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 793 flow [2024-06-21 18:13:32,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 93 transitions, 756 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:32,595 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 630 flow [2024-06-21 18:13:32,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=630, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-21 18:13:32,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-21 18:13:32,596 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 630 flow [2024-06-21 18:13:32,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:32,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:32,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:32,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:13:32,597 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:32,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:32,597 INFO L85 PathProgramCache]: Analyzing trace with hash 208208865, now seen corresponding path program 3 times [2024-06-21 18:13:32,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:32,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311830340] [2024-06-21 18:13:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:32,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:32,700 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 18:13:32,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:32,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311830340] [2024-06-21 18:13:32,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311830340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:32,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:32,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:32,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266127310] [2024-06-21 18:13:32,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:32,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:32,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:32,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:32,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:32,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:32,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 630 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:32,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:32,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:32,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:32,894 INFO L124 PetriNetUnfolderBase]: 713/1228 cut-off events. [2024-06-21 18:13:32,895 INFO L125 PetriNetUnfolderBase]: For 9634/9707 co-relation queries the response was YES. [2024-06-21 18:13:32,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5548 conditions, 1228 events. 713/1228 cut-off events. For 9634/9707 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6337 event pairs, 242 based on Foata normal form. 3/1212 useless extension candidates. Maximal degree in co-relation 5516. Up to 1036 conditions per place. [2024-06-21 18:13:32,903 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 53 selfloop transitions, 29 changer transitions 0/94 dead transitions. [2024-06-21 18:13:32,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 94 transitions, 832 flow [2024-06-21 18:13:32,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-21 18:13:32,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-21 18:13:32,905 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 630 flow. Second operand 5 states and 135 transitions. [2024-06-21 18:13:32,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 94 transitions, 832 flow [2024-06-21 18:13:32,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 94 transitions, 760 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:32,916 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 626 flow [2024-06-21 18:13:32,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=626, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2024-06-21 18:13:32,917 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-21 18:13:32,917 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 626 flow [2024-06-21 18:13:32,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:32,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:32,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:32,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:13:32,918 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:32,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:32,918 INFO L85 PathProgramCache]: Analyzing trace with hash 208670207, now seen corresponding path program 1 times [2024-06-21 18:13:32,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:32,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907719997] [2024-06-21 18:13:32,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:32,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:33,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:33,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907719997] [2024-06-21 18:13:33,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907719997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:33,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:33,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:33,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512473219] [2024-06-21 18:13:33,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:33,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:33,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:33,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:33,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:33,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:33,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 626 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:33,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:33,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:33,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:33,202 INFO L124 PetriNetUnfolderBase]: 687/1190 cut-off events. [2024-06-21 18:13:33,202 INFO L125 PetriNetUnfolderBase]: For 9682/9755 co-relation queries the response was YES. [2024-06-21 18:13:33,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5243 conditions, 1190 events. 687/1190 cut-off events. For 9682/9755 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6112 event pairs, 227 based on Foata normal form. 13/1184 useless extension candidates. Maximal degree in co-relation 5211. Up to 984 conditions per place. [2024-06-21 18:13:33,209 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 72 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-06-21 18:13:33,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 95 transitions, 848 flow [2024-06-21 18:13:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:33,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-06-21 18:13:33,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-21 18:13:33,210 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 626 flow. Second operand 4 states and 112 transitions. [2024-06-21 18:13:33,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 95 transitions, 848 flow [2024-06-21 18:13:33,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 95 transitions, 778 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:33,218 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 586 flow [2024-06-21 18:13:33,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=586, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2024-06-21 18:13:33,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-21 18:13:33,219 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 586 flow [2024-06-21 18:13:33,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:33,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:33,219 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 18:13:33,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:13:33,220 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:33,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:33,220 INFO L85 PathProgramCache]: Analyzing trace with hash -50933405, now seen corresponding path program 1 times [2024-06-21 18:13:33,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:33,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711539668] [2024-06-21 18:13:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:33,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:33,328 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 18:13:33,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:33,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711539668] [2024-06-21 18:13:33,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711539668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:33,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:33,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:33,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122620381] [2024-06-21 18:13:33,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:33,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:33,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:33,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:33,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:33,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:33,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 586 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:33,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:33,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:33,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:33,487 INFO L124 PetriNetUnfolderBase]: 689/1189 cut-off events. [2024-06-21 18:13:33,487 INFO L125 PetriNetUnfolderBase]: For 8709/8749 co-relation queries the response was YES. [2024-06-21 18:13:33,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5210 conditions, 1189 events. 689/1189 cut-off events. For 8709/8749 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6087 event pairs, 205 based on Foata normal form. 14/1187 useless extension candidates. Maximal degree in co-relation 5178. Up to 986 conditions per place. [2024-06-21 18:13:33,494 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 69 selfloop transitions, 27 changer transitions 0/108 dead transitions. [2024-06-21 18:13:33,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 108 transitions, 904 flow [2024-06-21 18:13:33,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:33,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:33,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-21 18:13:33,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-21 18:13:33,495 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 586 flow. Second operand 6 states and 162 transitions. [2024-06-21 18:13:33,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 108 transitions, 904 flow [2024-06-21 18:13:33,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 108 transitions, 888 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:33,504 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 680 flow [2024-06-21 18:13:33,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=680, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2024-06-21 18:13:33,504 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-21 18:13:33,504 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 680 flow [2024-06-21 18:13:33,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:33,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:33,505 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 18:13:33,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:13:33,505 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 18:13:33,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:33,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1043442410, now seen corresponding path program 1 times [2024-06-21 18:13:33,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:33,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349715028] [2024-06-21 18:13:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:33,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:33,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:33,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349715028] [2024-06-21 18:13:33,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349715028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:33,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:33,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:33,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689679799] [2024-06-21 18:13:33,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:33,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:33,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:33,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:33,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:33,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:33,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 680 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:33,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:33,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:33,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:33,864 INFO L124 PetriNetUnfolderBase]: 1050/1809 cut-off events. [2024-06-21 18:13:33,864 INFO L125 PetriNetUnfolderBase]: For 12981/12984 co-relation queries the response was YES. [2024-06-21 18:13:33,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7552 conditions, 1809 events. 1050/1809 cut-off events. For 12981/12984 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9876 event pairs, 278 based on Foata normal form. 12/1817 useless extension candidates. Maximal degree in co-relation 7519. Up to 1327 conditions per place. [2024-06-21 18:13:33,873 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 95 selfloop transitions, 23 changer transitions 0/126 dead transitions. [2024-06-21 18:13:33,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 126 transitions, 1079 flow [2024-06-21 18:13:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:33,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 18:13:33,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-21 18:13:33,874 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 680 flow. Second operand 7 states and 181 transitions. [2024-06-21 18:13:33,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 126 transitions, 1079 flow [2024-06-21 18:13:33,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 1036 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:33,885 INFO L231 Difference]: Finished difference. Result has 89 places, 91 transitions, 768 flow [2024-06-21 18:13:33,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=768, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2024-06-21 18:13:33,886 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-21 18:13:33,886 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 768 flow [2024-06-21 18:13:33,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:33,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:33,886 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 18:13:33,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:13:33,887 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:33,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:33,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1601694295, now seen corresponding path program 2 times [2024-06-21 18:13:33,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:33,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671660354] [2024-06-21 18:13:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:33,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:33,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:33,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671660354] [2024-06-21 18:13:33,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671660354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:33,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:33,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:33,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799779293] [2024-06-21 18:13:33,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:33,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:33,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:33,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:33,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:34,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:34,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 768 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:34,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:34,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:34,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:34,161 INFO L124 PetriNetUnfolderBase]: 810/1427 cut-off events. [2024-06-21 18:13:34,161 INFO L125 PetriNetUnfolderBase]: For 12074/12188 co-relation queries the response was YES. [2024-06-21 18:13:34,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6586 conditions, 1427 events. 810/1427 cut-off events. For 12074/12188 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7756 event pairs, 237 based on Foata normal form. 4/1410 useless extension candidates. Maximal degree in co-relation 6549. Up to 1175 conditions per place. [2024-06-21 18:13:34,169 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 66 selfloop transitions, 32 changer transitions 0/111 dead transitions. [2024-06-21 18:13:34,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 111 transitions, 1056 flow [2024-06-21 18:13:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 18:13:34,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-21 18:13:34,170 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 768 flow. Second operand 6 states and 157 transitions. [2024-06-21 18:13:34,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 111 transitions, 1056 flow [2024-06-21 18:13:34,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 111 transitions, 1017 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:34,183 INFO L231 Difference]: Finished difference. Result has 93 places, 94 transitions, 821 flow [2024-06-21 18:13:34,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=821, PETRI_PLACES=93, PETRI_TRANSITIONS=94} [2024-06-21 18:13:34,183 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-21 18:13:34,183 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 94 transitions, 821 flow [2024-06-21 18:13:34,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:34,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:34,184 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 18:13:34,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:13:34,184 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:34,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:34,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1704192316, now seen corresponding path program 2 times [2024-06-21 18:13:34,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:34,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85094640] [2024-06-21 18:13:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:34,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:34,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:34,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85094640] [2024-06-21 18:13:34,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85094640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:34,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:34,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:34,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414861268] [2024-06-21 18:13:34,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:34,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:34,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:34,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:34,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:34,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:34,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 94 transitions, 821 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:34,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:34,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:34,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:34,534 INFO L124 PetriNetUnfolderBase]: 1147/1966 cut-off events. [2024-06-21 18:13:34,535 INFO L125 PetriNetUnfolderBase]: For 16714/16717 co-relation queries the response was YES. [2024-06-21 18:13:34,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8573 conditions, 1966 events. 1147/1966 cut-off events. For 16714/16717 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10962 event pairs, 335 based on Foata normal form. 14/1969 useless extension candidates. Maximal degree in co-relation 8535. Up to 1490 conditions per place. [2024-06-21 18:13:34,547 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 96 selfloop transitions, 25 changer transitions 0/129 dead transitions. [2024-06-21 18:13:34,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 129 transitions, 1214 flow [2024-06-21 18:13:34,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:34,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 18:13:34,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 18:13:34,549 INFO L175 Difference]: Start difference. First operand has 93 places, 94 transitions, 821 flow. Second operand 7 states and 178 transitions. [2024-06-21 18:13:34,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 129 transitions, 1214 flow [2024-06-21 18:13:34,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 129 transitions, 1161 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:34,565 INFO L231 Difference]: Finished difference. Result has 98 places, 98 transitions, 889 flow [2024-06-21 18:13:34,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=889, PETRI_PLACES=98, PETRI_TRANSITIONS=98} [2024-06-21 18:13:34,565 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-21 18:13:34,565 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 98 transitions, 889 flow [2024-06-21 18:13:34,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:34,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:34,566 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 18:13:34,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:13:34,566 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 18:13:34,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:34,567 INFO L85 PathProgramCache]: Analyzing trace with hash -685071406, now seen corresponding path program 3 times [2024-06-21 18:13:34,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:34,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895083155] [2024-06-21 18:13:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:34,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:34,688 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 18:13:34,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:34,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895083155] [2024-06-21 18:13:34,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895083155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:34,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:34,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:34,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176762696] [2024-06-21 18:13:34,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:34,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:34,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:34,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:34,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:34,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:34,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 98 transitions, 889 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:34,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:34,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:34,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:34,938 INFO L124 PetriNetUnfolderBase]: 1127/1938 cut-off events. [2024-06-21 18:13:34,939 INFO L125 PetriNetUnfolderBase]: For 17713/17716 co-relation queries the response was YES. [2024-06-21 18:13:34,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8438 conditions, 1938 events. 1127/1938 cut-off events. For 17713/17716 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10829 event pairs, 284 based on Foata normal form. 14/1941 useless extension candidates. Maximal degree in co-relation 8398. Up to 1169 conditions per place. [2024-06-21 18:13:34,949 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 90 selfloop transitions, 31 changer transitions 0/129 dead transitions. [2024-06-21 18:13:34,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 129 transitions, 1207 flow [2024-06-21 18:13:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:34,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:34,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 18:13:34,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 18:13:34,951 INFO L175 Difference]: Start difference. First operand has 98 places, 98 transitions, 889 flow. Second operand 7 states and 177 transitions. [2024-06-21 18:13:34,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 129 transitions, 1207 flow [2024-06-21 18:13:34,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 129 transitions, 1161 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:34,968 INFO L231 Difference]: Finished difference. Result has 102 places, 97 transitions, 887 flow [2024-06-21 18:13:34,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=887, PETRI_PLACES=102, PETRI_TRANSITIONS=97} [2024-06-21 18:13:34,969 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-21 18:13:34,969 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 97 transitions, 887 flow [2024-06-21 18:13:34,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:34,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:34,970 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 18:13:34,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:13:34,970 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:34,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:34,970 INFO L85 PathProgramCache]: Analyzing trace with hash 303628165, now seen corresponding path program 3 times [2024-06-21 18:13:34,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:34,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430849451] [2024-06-21 18:13:34,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:34,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:35,078 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 18:13:35,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:35,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430849451] [2024-06-21 18:13:35,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430849451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:35,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:35,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:35,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499848688] [2024-06-21 18:13:35,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:35,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:35,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:35,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:35,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:35,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:35,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 97 transitions, 887 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:35,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:35,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:35,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:35,263 INFO L124 PetriNetUnfolderBase]: 867/1535 cut-off events. [2024-06-21 18:13:35,264 INFO L125 PetriNetUnfolderBase]: For 14965/15079 co-relation queries the response was YES. [2024-06-21 18:13:35,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7033 conditions, 1535 events. 867/1535 cut-off events. For 14965/15079 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8605 event pairs, 248 based on Foata normal form. 4/1518 useless extension candidates. Maximal degree in co-relation 6991. Up to 1280 conditions per place. [2024-06-21 18:13:35,272 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 73 selfloop transitions, 32 changer transitions 0/118 dead transitions. [2024-06-21 18:13:35,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 118 transitions, 1151 flow [2024-06-21 18:13:35,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:35,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-06-21 18:13:35,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6780487804878049 [2024-06-21 18:13:35,273 INFO L175 Difference]: Start difference. First operand has 102 places, 97 transitions, 887 flow. Second operand 5 states and 139 transitions. [2024-06-21 18:13:35,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 118 transitions, 1151 flow [2024-06-21 18:13:35,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 118 transitions, 1067 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:35,297 INFO L231 Difference]: Finished difference. Result has 102 places, 97 transitions, 888 flow [2024-06-21 18:13:35,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=888, PETRI_PLACES=102, PETRI_TRANSITIONS=97} [2024-06-21 18:13:35,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-21 18:13:35,297 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 97 transitions, 888 flow [2024-06-21 18:13:35,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:35,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:35,298 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 18:13:35,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:13:35,298 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:35,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:35,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1896337596, now seen corresponding path program 1 times [2024-06-21 18:13:35,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:35,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601175537] [2024-06-21 18:13:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:35,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:35,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:35,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601175537] [2024-06-21 18:13:35,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601175537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:35,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:35,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:35,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268004629] [2024-06-21 18:13:35,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:35,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:35,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:35,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:35,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:35,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:35,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 97 transitions, 888 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:35,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:35,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:35,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:35,631 INFO L124 PetriNetUnfolderBase]: 875/1551 cut-off events. [2024-06-21 18:13:35,631 INFO L125 PetriNetUnfolderBase]: For 15468/15582 co-relation queries the response was YES. [2024-06-21 18:13:35,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7064 conditions, 1551 events. 875/1551 cut-off events. For 15468/15582 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8708 event pairs, 248 based on Foata normal form. 4/1534 useless extension candidates. Maximal degree in co-relation 7021. Up to 1238 conditions per place. [2024-06-21 18:13:35,640 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 66 selfloop transitions, 48 changer transitions 0/127 dead transitions. [2024-06-21 18:13:35,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 127 transitions, 1268 flow [2024-06-21 18:13:35,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:35,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 18:13:35,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-21 18:13:35,643 INFO L175 Difference]: Start difference. First operand has 102 places, 97 transitions, 888 flow. Second operand 7 states and 185 transitions. [2024-06-21 18:13:35,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 127 transitions, 1268 flow [2024-06-21 18:13:35,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 127 transitions, 1182 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:35,665 INFO L231 Difference]: Finished difference. Result has 103 places, 103 transitions, 972 flow [2024-06-21 18:13:35,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=972, PETRI_PLACES=103, PETRI_TRANSITIONS=103} [2024-06-21 18:13:35,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-21 18:13:35,666 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 103 transitions, 972 flow [2024-06-21 18:13:35,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:35,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:35,667 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 18:13:35,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:13:35,667 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:35,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:35,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1571596476, now seen corresponding path program 2 times [2024-06-21 18:13:35,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:35,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180128646] [2024-06-21 18:13:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:35,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:35,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:35,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180128646] [2024-06-21 18:13:35,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180128646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:35,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:35,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:35,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405348388] [2024-06-21 18:13:35,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:35,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:35,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:35,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:35,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:35,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:35,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 972 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:35,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:35,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:35,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:35,982 INFO L124 PetriNetUnfolderBase]: 896/1590 cut-off events. [2024-06-21 18:13:35,982 INFO L125 PetriNetUnfolderBase]: For 14730/14844 co-relation queries the response was YES. [2024-06-21 18:13:35,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7410 conditions, 1590 events. 896/1590 cut-off events. For 14730/14844 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8971 event pairs, 248 based on Foata normal form. 4/1573 useless extension candidates. Maximal degree in co-relation 7368. Up to 1263 conditions per place. [2024-06-21 18:13:35,991 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 64 selfloop transitions, 51 changer transitions 0/128 dead transitions. [2024-06-21 18:13:35,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 128 transitions, 1380 flow [2024-06-21 18:13:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 18:13:35,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 18:13:35,992 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 972 flow. Second operand 7 states and 182 transitions. [2024-06-21 18:13:35,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 128 transitions, 1380 flow [2024-06-21 18:13:36,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 128 transitions, 1303 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:36,014 INFO L231 Difference]: Finished difference. Result has 107 places, 109 transitions, 1071 flow [2024-06-21 18:13:36,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1071, PETRI_PLACES=107, PETRI_TRANSITIONS=109} [2024-06-21 18:13:36,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-21 18:13:36,015 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 109 transitions, 1071 flow [2024-06-21 18:13:36,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:36,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:36,015 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 18:13:36,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:13:36,016 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:36,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:36,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1571210526, now seen corresponding path program 3 times [2024-06-21 18:13:36,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:36,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952493394] [2024-06-21 18:13:36,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:36,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:36,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:36,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952493394] [2024-06-21 18:13:36,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952493394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:36,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:36,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:36,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182180073] [2024-06-21 18:13:36,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:36,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:36,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:36,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:36,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:36,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:36,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 1071 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:36,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:36,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:36,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:36,345 INFO L124 PetriNetUnfolderBase]: 891/1583 cut-off events. [2024-06-21 18:13:36,345 INFO L125 PetriNetUnfolderBase]: For 15582/15696 co-relation queries the response was YES. [2024-06-21 18:13:36,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7510 conditions, 1583 events. 891/1583 cut-off events. For 15582/15696 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8931 event pairs, 248 based on Foata normal form. 4/1566 useless extension candidates. Maximal degree in co-relation 7466. Up to 1258 conditions per place. [2024-06-21 18:13:36,356 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 52 changer transitions 0/127 dead transitions. [2024-06-21 18:13:36,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 127 transitions, 1377 flow [2024-06-21 18:13:36,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:36,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 18:13:36,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-21 18:13:36,358 INFO L175 Difference]: Start difference. First operand has 107 places, 109 transitions, 1071 flow. Second operand 7 states and 180 transitions. [2024-06-21 18:13:36,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 127 transitions, 1377 flow [2024-06-21 18:13:36,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 127 transitions, 1286 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:36,382 INFO L231 Difference]: Finished difference. Result has 111 places, 109 transitions, 1090 flow [2024-06-21 18:13:36,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1090, PETRI_PLACES=111, PETRI_TRANSITIONS=109} [2024-06-21 18:13:36,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-21 18:13:36,383 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 109 transitions, 1090 flow [2024-06-21 18:13:36,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:36,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:36,383 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 18:13:36,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:13:36,384 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:36,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:36,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1571196638, now seen corresponding path program 1 times [2024-06-21 18:13:36,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:36,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775427670] [2024-06-21 18:13:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:36,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:36,516 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 18:13:36,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:36,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775427670] [2024-06-21 18:13:36,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775427670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:36,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:36,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:36,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962146742] [2024-06-21 18:13:36,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:36,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:36,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:36,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:36,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:36,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:36,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 109 transitions, 1090 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:36,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:36,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:36,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:36,731 INFO L124 PetriNetUnfolderBase]: 923/1635 cut-off events. [2024-06-21 18:13:36,732 INFO L125 PetriNetUnfolderBase]: For 18637/18751 co-relation queries the response was YES. [2024-06-21 18:13:36,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7846 conditions, 1635 events. 923/1635 cut-off events. For 18637/18751 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9286 event pairs, 252 based on Foata normal form. 12/1626 useless extension candidates. Maximal degree in co-relation 7801. Up to 1355 conditions per place. [2024-06-21 18:13:36,740 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 86 selfloop transitions, 32 changer transitions 0/131 dead transitions. [2024-06-21 18:13:36,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 131 transitions, 1412 flow [2024-06-21 18:13:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:36,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 18:13:36,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 18:13:36,742 INFO L175 Difference]: Start difference. First operand has 111 places, 109 transitions, 1090 flow. Second operand 7 states and 178 transitions. [2024-06-21 18:13:36,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 131 transitions, 1412 flow [2024-06-21 18:13:36,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 131 transitions, 1300 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:36,761 INFO L231 Difference]: Finished difference. Result has 112 places, 110 transitions, 1063 flow [2024-06-21 18:13:36,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1063, PETRI_PLACES=112, PETRI_TRANSITIONS=110} [2024-06-21 18:13:36,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-21 18:13:36,762 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 110 transitions, 1063 flow [2024-06-21 18:13:36,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:36,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:36,762 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 18:13:36,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:13:36,763 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:36,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:36,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1346620130, now seen corresponding path program 4 times [2024-06-21 18:13:36,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:36,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193867459] [2024-06-21 18:13:36,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:36,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:36,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:36,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193867459] [2024-06-21 18:13:36,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193867459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:36,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:36,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:36,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492502168] [2024-06-21 18:13:36,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:36,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:36,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:36,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:36,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:36,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:36,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 110 transitions, 1063 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:36,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:36,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:36,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:37,145 INFO L124 PetriNetUnfolderBase]: 931/1651 cut-off events. [2024-06-21 18:13:37,146 INFO L125 PetriNetUnfolderBase]: For 18565/18679 co-relation queries the response was YES. [2024-06-21 18:13:37,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7960 conditions, 1651 events. 931/1651 cut-off events. For 18565/18679 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9407 event pairs, 252 based on Foata normal form. 4/1634 useless extension candidates. Maximal degree in co-relation 7914. Up to 1362 conditions per place. [2024-06-21 18:13:37,154 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 81 selfloop transitions, 40 changer transitions 0/134 dead transitions. [2024-06-21 18:13:37,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 134 transitions, 1390 flow [2024-06-21 18:13:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-06-21 18:13:37,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6926829268292682 [2024-06-21 18:13:37,155 INFO L175 Difference]: Start difference. First operand has 112 places, 110 transitions, 1063 flow. Second operand 5 states and 142 transitions. [2024-06-21 18:13:37,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 134 transitions, 1390 flow [2024-06-21 18:13:37,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 134 transitions, 1323 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:37,178 INFO L231 Difference]: Finished difference. Result has 112 places, 113 transitions, 1138 flow [2024-06-21 18:13:37,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1138, PETRI_PLACES=112, PETRI_TRANSITIONS=113} [2024-06-21 18:13:37,179 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-21 18:13:37,179 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 113 transitions, 1138 flow [2024-06-21 18:13:37,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:37,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:37,179 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 18:13:37,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:13:37,180 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:37,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:37,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1775091590, now seen corresponding path program 5 times [2024-06-21 18:13:37,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:37,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266106913] [2024-06-21 18:13:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:37,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:37,278 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 18:13:37,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:37,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266106913] [2024-06-21 18:13:37,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266106913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:37,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:37,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:37,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888060356] [2024-06-21 18:13:37,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:37,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:37,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:37,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:37,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:37,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:37,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 113 transitions, 1138 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:37,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:37,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:37,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:37,485 INFO L124 PetriNetUnfolderBase]: 939/1667 cut-off events. [2024-06-21 18:13:37,485 INFO L125 PetriNetUnfolderBase]: For 20038/20152 co-relation queries the response was YES. [2024-06-21 18:13:37,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8144 conditions, 1667 events. 939/1667 cut-off events. For 20038/20152 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9503 event pairs, 252 based on Foata normal form. 4/1650 useless extension candidates. Maximal degree in co-relation 8097. Up to 1330 conditions per place. [2024-06-21 18:13:37,496 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 65 selfloop transitions, 55 changer transitions 0/133 dead transitions. [2024-06-21 18:13:37,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 133 transitions, 1497 flow [2024-06-21 18:13:37,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:37,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 18:13:37,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-21 18:13:37,497 INFO L175 Difference]: Start difference. First operand has 112 places, 113 transitions, 1138 flow. Second operand 6 states and 158 transitions. [2024-06-21 18:13:37,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 133 transitions, 1497 flow [2024-06-21 18:13:37,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 133 transitions, 1409 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:37,522 INFO L231 Difference]: Finished difference. Result has 114 places, 116 transitions, 1209 flow [2024-06-21 18:13:37,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1209, PETRI_PLACES=114, PETRI_TRANSITIONS=116} [2024-06-21 18:13:37,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-21 18:13:37,523 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 116 transitions, 1209 flow [2024-06-21 18:13:37,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:37,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:37,523 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 18:13:37,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:13:37,524 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:37,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:37,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1775102750, now seen corresponding path program 6 times [2024-06-21 18:13:37,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:37,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208825677] [2024-06-21 18:13:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:37,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:37,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:37,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208825677] [2024-06-21 18:13:37,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208825677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:37,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:37,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:37,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552840425] [2024-06-21 18:13:37,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:37,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:37,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:37,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:37,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:37,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:37,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 116 transitions, 1209 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:37,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:37,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:37,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:37,831 INFO L124 PetriNetUnfolderBase]: 934/1660 cut-off events. [2024-06-21 18:13:37,831 INFO L125 PetriNetUnfolderBase]: For 19774/19888 co-relation queries the response was YES. [2024-06-21 18:13:37,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8091 conditions, 1660 events. 934/1660 cut-off events. For 19774/19888 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9472 event pairs, 252 based on Foata normal form. 4/1643 useless extension candidates. Maximal degree in co-relation 8044. Up to 1325 conditions per place. [2024-06-21 18:13:37,841 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 66 selfloop transitions, 59 changer transitions 0/138 dead transitions. [2024-06-21 18:13:37,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 138 transitions, 1515 flow [2024-06-21 18:13:37,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:37,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:37,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-21 18:13:37,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6626016260162602 [2024-06-21 18:13:37,842 INFO L175 Difference]: Start difference. First operand has 114 places, 116 transitions, 1209 flow. Second operand 6 states and 163 transitions. [2024-06-21 18:13:37,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 138 transitions, 1515 flow [2024-06-21 18:13:37,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 138 transitions, 1383 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:37,866 INFO L231 Difference]: Finished difference. Result has 116 places, 116 transitions, 1209 flow [2024-06-21 18:13:37,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1209, PETRI_PLACES=116, PETRI_TRANSITIONS=116} [2024-06-21 18:13:37,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-21 18:13:37,870 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 116 transitions, 1209 flow [2024-06-21 18:13:37,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:37,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:37,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:37,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:13:37,870 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:37,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:37,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1346606242, now seen corresponding path program 2 times [2024-06-21 18:13:37,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:37,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698018715] [2024-06-21 18:13:37,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:37,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:38,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:38,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698018715] [2024-06-21 18:13:38,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698018715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:38,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:38,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:38,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133640895] [2024-06-21 18:13:38,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:38,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:38,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:38,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:38,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:38,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:38,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 116 transitions, 1209 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:38,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:38,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:38,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:38,252 INFO L124 PetriNetUnfolderBase]: 974/1724 cut-off events. [2024-06-21 18:13:38,252 INFO L125 PetriNetUnfolderBase]: For 22147/22261 co-relation queries the response was YES. [2024-06-21 18:13:38,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8445 conditions, 1724 events. 974/1724 cut-off events. For 22147/22261 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9947 event pairs, 252 based on Foata normal form. 14/1715 useless extension candidates. Maximal degree in co-relation 8398. Up to 1396 conditions per place. [2024-06-21 18:13:38,262 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 100 selfloop transitions, 27 changer transitions 0/140 dead transitions. [2024-06-21 18:13:38,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 140 transitions, 1561 flow [2024-06-21 18:13:38,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:38,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:38,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-21 18:13:38,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6878048780487804 [2024-06-21 18:13:38,263 INFO L175 Difference]: Start difference. First operand has 116 places, 116 transitions, 1209 flow. Second operand 5 states and 141 transitions. [2024-06-21 18:13:38,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 140 transitions, 1561 flow [2024-06-21 18:13:38,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 140 transitions, 1423 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:38,286 INFO L231 Difference]: Finished difference. Result has 114 places, 118 transitions, 1163 flow [2024-06-21 18:13:38,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1163, PETRI_PLACES=114, PETRI_TRANSITIONS=118} [2024-06-21 18:13:38,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-21 18:13:38,287 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 118 transitions, 1163 flow [2024-06-21 18:13:38,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:38,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:38,287 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 18:13:38,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:13:38,287 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:38,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:38,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1331369122, now seen corresponding path program 3 times [2024-06-21 18:13:38,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:38,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680394726] [2024-06-21 18:13:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:38,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:38,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:38,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680394726] [2024-06-21 18:13:38,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680394726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:38,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:38,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:38,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242495178] [2024-06-21 18:13:38,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:38,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:38,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:38,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:38,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:38,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 118 transitions, 1163 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:38,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:38,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:38,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:38,660 INFO L124 PetriNetUnfolderBase]: 1021/1839 cut-off events. [2024-06-21 18:13:38,660 INFO L125 PetriNetUnfolderBase]: For 21195/21309 co-relation queries the response was YES. [2024-06-21 18:13:38,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8798 conditions, 1839 events. 1021/1839 cut-off events. For 21195/21309 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10813 event pairs, 194 based on Foata normal form. 14/1832 useless extension candidates. Maximal degree in co-relation 8752. Up to 1320 conditions per place. [2024-06-21 18:13:38,670 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 106 selfloop transitions, 33 changer transitions 0/152 dead transitions. [2024-06-21 18:13:38,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 152 transitions, 1601 flow [2024-06-21 18:13:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-21 18:13:38,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6910569105691057 [2024-06-21 18:13:38,672 INFO L175 Difference]: Start difference. First operand has 114 places, 118 transitions, 1163 flow. Second operand 6 states and 170 transitions. [2024-06-21 18:13:38,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 152 transitions, 1601 flow [2024-06-21 18:13:38,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 152 transitions, 1541 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:38,697 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 1243 flow [2024-06-21 18:13:38,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1243, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2024-06-21 18:13:38,698 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-21 18:13:38,699 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 1243 flow [2024-06-21 18:13:38,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:38,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:38,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:38,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:13:38,699 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:38,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:38,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1774702912, now seen corresponding path program 4 times [2024-06-21 18:13:38,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:38,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982977919] [2024-06-21 18:13:38,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:38,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:38,820 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 18:13:38,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:38,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982977919] [2024-06-21 18:13:38,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982977919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:38,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:38,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:38,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602723492] [2024-06-21 18:13:38,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:38,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:38,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:38,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:38,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:38,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:38,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 1243 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:38,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:38,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:38,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:39,047 INFO L124 PetriNetUnfolderBase]: 1033/1841 cut-off events. [2024-06-21 18:13:39,048 INFO L125 PetriNetUnfolderBase]: For 19592/19706 co-relation queries the response was YES. [2024-06-21 18:13:39,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8884 conditions, 1841 events. 1033/1841 cut-off events. For 19592/19706 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10791 event pairs, 281 based on Foata normal form. 12/1832 useless extension candidates. Maximal degree in co-relation 8836. Up to 1495 conditions per place. [2024-06-21 18:13:39,058 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 99 selfloop transitions, 31 changer transitions 0/143 dead transitions. [2024-06-21 18:13:39,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 143 transitions, 1589 flow [2024-06-21 18:13:39,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:39,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:39,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 18:13:39,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-21 18:13:39,059 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 1243 flow. Second operand 6 states and 157 transitions. [2024-06-21 18:13:39,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 143 transitions, 1589 flow [2024-06-21 18:13:39,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 143 transitions, 1548 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:39,085 INFO L231 Difference]: Finished difference. Result has 122 places, 123 transitions, 1290 flow [2024-06-21 18:13:39,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1290, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2024-06-21 18:13:39,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-21 18:13:39,086 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 1290 flow [2024-06-21 18:13:39,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:39,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:39,086 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 18:13:39,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:13:39,087 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:39,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:39,087 INFO L85 PathProgramCache]: Analyzing trace with hash -567888250, now seen corresponding path program 1 times [2024-06-21 18:13:39,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:39,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780461375] [2024-06-21 18:13:39,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:39,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:39,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:39,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780461375] [2024-06-21 18:13:39,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780461375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:39,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:39,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:39,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761077284] [2024-06-21 18:13:39,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:39,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:39,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:39,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:39,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:39,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:39,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 1290 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:39,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:39,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:39,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:39,505 INFO L124 PetriNetUnfolderBase]: 1096/1936 cut-off events. [2024-06-21 18:13:39,505 INFO L125 PetriNetUnfolderBase]: For 20646/20728 co-relation queries the response was YES. [2024-06-21 18:13:39,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9475 conditions, 1936 events. 1096/1936 cut-off events. For 20646/20728 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 11339 event pairs, 216 based on Foata normal form. 12/1926 useless extension candidates. Maximal degree in co-relation 9425. Up to 1236 conditions per place. [2024-06-21 18:13:39,518 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 110 selfloop transitions, 37 changer transitions 0/160 dead transitions. [2024-06-21 18:13:39,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 160 transitions, 1768 flow [2024-06-21 18:13:39,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-21 18:13:39,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662020905923345 [2024-06-21 18:13:39,519 INFO L175 Difference]: Start difference. First operand has 122 places, 123 transitions, 1290 flow. Second operand 7 states and 190 transitions. [2024-06-21 18:13:39,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 160 transitions, 1768 flow [2024-06-21 18:13:39,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1702 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:39,550 INFO L231 Difference]: Finished difference. Result has 125 places, 125 transitions, 1328 flow [2024-06-21 18:13:39,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1328, PETRI_PLACES=125, PETRI_TRANSITIONS=125} [2024-06-21 18:13:39,551 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-21 18:13:39,551 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 125 transitions, 1328 flow [2024-06-21 18:13:39,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:39,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:39,551 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 18:13:39,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:13:39,552 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:39,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:39,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1702333118, now seen corresponding path program 2 times [2024-06-21 18:13:39,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:39,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543159001] [2024-06-21 18:13:39,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:39,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:39,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:39,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543159001] [2024-06-21 18:13:39,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543159001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:39,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:39,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:39,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643746728] [2024-06-21 18:13:39,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:39,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:39,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:39,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:39,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:39,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 125 transitions, 1328 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:39,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:39,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:39,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:39,930 INFO L124 PetriNetUnfolderBase]: 1128/1994 cut-off events. [2024-06-21 18:13:39,931 INFO L125 PetriNetUnfolderBase]: For 21703/21785 co-relation queries the response was YES. [2024-06-21 18:13:39,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9798 conditions, 1994 events. 1128/1994 cut-off events. For 21703/21785 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11741 event pairs, 298 based on Foata normal form. 12/1986 useless extension candidates. Maximal degree in co-relation 9747. Up to 1661 conditions per place. [2024-06-21 18:13:39,943 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 104 selfloop transitions, 36 changer transitions 0/153 dead transitions. [2024-06-21 18:13:39,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 153 transitions, 1708 flow [2024-06-21 18:13:39,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:39,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 18:13:39,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-21 18:13:39,944 INFO L175 Difference]: Start difference. First operand has 125 places, 125 transitions, 1328 flow. Second operand 7 states and 183 transitions. [2024-06-21 18:13:39,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 153 transitions, 1708 flow [2024-06-21 18:13:39,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 153 transitions, 1660 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:39,974 INFO L231 Difference]: Finished difference. Result has 129 places, 126 transitions, 1371 flow [2024-06-21 18:13:39,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1371, PETRI_PLACES=129, PETRI_TRANSITIONS=126} [2024-06-21 18:13:39,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-21 18:13:39,975 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 126 transitions, 1371 flow [2024-06-21 18:13:39,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:39,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:39,975 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 18:13:39,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:13:39,975 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:39,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash -225292990, now seen corresponding path program 3 times [2024-06-21 18:13:39,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:39,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383305146] [2024-06-21 18:13:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:39,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:40,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:40,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383305146] [2024-06-21 18:13:40,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383305146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:40,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:40,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:40,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073053527] [2024-06-21 18:13:40,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:40,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:40,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:40,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:40,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:40,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:40,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 126 transitions, 1371 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:40,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:40,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:40,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:40,384 INFO L124 PetriNetUnfolderBase]: 1160/2046 cut-off events. [2024-06-21 18:13:40,385 INFO L125 PetriNetUnfolderBase]: For 23185/23267 co-relation queries the response was YES. [2024-06-21 18:13:40,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10181 conditions, 2046 events. 1160/2046 cut-off events. For 23185/23267 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12064 event pairs, 302 based on Foata normal form. 12/2038 useless extension candidates. Maximal degree in co-relation 10128. Up to 1713 conditions per place. [2024-06-21 18:13:40,397 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 100 selfloop transitions, 35 changer transitions 0/148 dead transitions. [2024-06-21 18:13:40,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 148 transitions, 1725 flow [2024-06-21 18:13:40,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 18:13:40,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 18:13:40,398 INFO L175 Difference]: Start difference. First operand has 129 places, 126 transitions, 1371 flow. Second operand 7 states and 178 transitions. [2024-06-21 18:13:40,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 148 transitions, 1725 flow [2024-06-21 18:13:40,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 148 transitions, 1654 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:40,433 INFO L231 Difference]: Finished difference. Result has 131 places, 127 transitions, 1389 flow [2024-06-21 18:13:40,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1389, PETRI_PLACES=131, PETRI_TRANSITIONS=127} [2024-06-21 18:13:40,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-21 18:13:40,433 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 127 transitions, 1389 flow [2024-06-21 18:13:40,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:40,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:40,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:40,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 18:13:40,434 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:40,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:40,435 INFO L85 PathProgramCache]: Analyzing trace with hash 806379958, now seen corresponding path program 4 times [2024-06-21 18:13:40,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:40,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861676241] [2024-06-21 18:13:40,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:40,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:40,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:40,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861676241] [2024-06-21 18:13:40,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861676241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:40,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:40,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:40,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771618772] [2024-06-21 18:13:40,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:40,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:40,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:40,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:40,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:40,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:40,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 127 transitions, 1389 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:40,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:40,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:40,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:40,855 INFO L124 PetriNetUnfolderBase]: 1139/2009 cut-off events. [2024-06-21 18:13:40,855 INFO L125 PetriNetUnfolderBase]: For 22654/22736 co-relation queries the response was YES. [2024-06-21 18:13:40,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9908 conditions, 2009 events. 1139/2009 cut-off events. For 22654/22736 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11854 event pairs, 233 based on Foata normal form. 12/1997 useless extension candidates. Maximal degree in co-relation 9854. Up to 1266 conditions per place. [2024-06-21 18:13:40,867 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 107 selfloop transitions, 36 changer transitions 0/156 dead transitions. [2024-06-21 18:13:40,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 156 transitions, 1769 flow [2024-06-21 18:13:40,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:40,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-21 18:13:40,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6747967479674797 [2024-06-21 18:13:40,868 INFO L175 Difference]: Start difference. First operand has 131 places, 127 transitions, 1389 flow. Second operand 6 states and 166 transitions. [2024-06-21 18:13:40,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 156 transitions, 1769 flow [2024-06-21 18:13:40,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 156 transitions, 1696 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:40,901 INFO L231 Difference]: Finished difference. Result has 132 places, 127 transitions, 1405 flow [2024-06-21 18:13:40,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1405, PETRI_PLACES=132, PETRI_TRANSITIONS=127} [2024-06-21 18:13:40,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-21 18:13:40,902 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 127 transitions, 1405 flow [2024-06-21 18:13:40,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:40,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:40,906 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 18:13:40,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 18:13:40,906 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:40,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:40,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1498415145, now seen corresponding path program 1 times [2024-06-21 18:13:40,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:40,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53911506] [2024-06-21 18:13:40,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:40,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:41,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:41,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53911506] [2024-06-21 18:13:41,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53911506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:41,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:41,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:41,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443227759] [2024-06-21 18:13:41,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:41,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:41,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:41,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:41,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:41,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:41,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 127 transitions, 1405 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:41,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:41,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:41,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:41,397 INFO L124 PetriNetUnfolderBase]: 1338/2390 cut-off events. [2024-06-21 18:13:41,397 INFO L125 PetriNetUnfolderBase]: For 35882/35964 co-relation queries the response was YES. [2024-06-21 18:13:41,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11843 conditions, 2390 events. 1338/2390 cut-off events. For 35882/35964 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14633 event pairs, 370 based on Foata normal form. 32/2406 useless extension candidates. Maximal degree in co-relation 11788. Up to 1016 conditions per place. [2024-06-21 18:13:41,409 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 80 selfloop transitions, 51 changer transitions 27/171 dead transitions. [2024-06-21 18:13:41,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 171 transitions, 1943 flow [2024-06-21 18:13:41,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:41,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-21 18:13:41,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6676829268292683 [2024-06-21 18:13:41,411 INFO L175 Difference]: Start difference. First operand has 132 places, 127 transitions, 1405 flow. Second operand 8 states and 219 transitions. [2024-06-21 18:13:41,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 171 transitions, 1943 flow [2024-06-21 18:13:41,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 171 transitions, 1843 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:41,445 INFO L231 Difference]: Finished difference. Result has 133 places, 118 transitions, 1273 flow [2024-06-21 18:13:41,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1273, PETRI_PLACES=133, PETRI_TRANSITIONS=118} [2024-06-21 18:13:41,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-21 18:13:41,447 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 118 transitions, 1273 flow [2024-06-21 18:13:41,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:41,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:41,447 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 18:13:41,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 18:13:41,447 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:41,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:41,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1314267421, now seen corresponding path program 2 times [2024-06-21 18:13:41,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:41,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781551356] [2024-06-21 18:13:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:41,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:41,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:41,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781551356] [2024-06-21 18:13:41,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781551356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:41,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:41,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:41,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652975230] [2024-06-21 18:13:41,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:41,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:41,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:41,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:41,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:41,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:41,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 118 transitions, 1273 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:41,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:41,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:41,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:41,849 INFO L124 PetriNetUnfolderBase]: 1114/2020 cut-off events. [2024-06-21 18:13:41,850 INFO L125 PetriNetUnfolderBase]: For 25937/25939 co-relation queries the response was YES. [2024-06-21 18:13:41,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9804 conditions, 2020 events. 1114/2020 cut-off events. For 25937/25939 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12048 event pairs, 394 based on Foata normal form. 36/2047 useless extension candidates. Maximal degree in co-relation 9750. Up to 1491 conditions per place. [2024-06-21 18:13:41,862 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 75 selfloop transitions, 54 changer transitions 3/145 dead transitions. [2024-06-21 18:13:41,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 145 transitions, 1629 flow [2024-06-21 18:13:41,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:41,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 18:13:41,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 18:13:41,863 INFO L175 Difference]: Start difference. First operand has 133 places, 118 transitions, 1273 flow. Second operand 8 states and 205 transitions. [2024-06-21 18:13:41,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 145 transitions, 1629 flow [2024-06-21 18:13:41,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 145 transitions, 1527 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:41,894 INFO L231 Difference]: Finished difference. Result has 128 places, 117 transitions, 1278 flow [2024-06-21 18:13:41,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1278, PETRI_PLACES=128, PETRI_TRANSITIONS=117} [2024-06-21 18:13:41,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-21 18:13:41,895 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 117 transitions, 1278 flow [2024-06-21 18:13:41,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:41,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:41,895 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 18:13:41,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 18:13:41,896 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:41,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:41,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1232717865, now seen corresponding path program 3 times [2024-06-21 18:13:41,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:41,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082728627] [2024-06-21 18:13:41,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:41,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:42,007 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 18:13:42,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:42,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082728627] [2024-06-21 18:13:42,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082728627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:42,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:42,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:42,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389560041] [2024-06-21 18:13:42,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:42,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:42,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:42,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:42,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:42,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:42,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 117 transitions, 1278 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:42,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:42,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:42,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:42,286 INFO L124 PetriNetUnfolderBase]: 1180/2146 cut-off events. [2024-06-21 18:13:42,286 INFO L125 PetriNetUnfolderBase]: For 23552/23554 co-relation queries the response was YES. [2024-06-21 18:13:42,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10046 conditions, 2146 events. 1180/2146 cut-off events. For 23552/23554 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13031 event pairs, 380 based on Foata normal form. 32/2169 useless extension candidates. Maximal degree in co-relation 9994. Up to 1433 conditions per place. [2024-06-21 18:13:42,299 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 61 selfloop transitions, 43 changer transitions 34/150 dead transitions. [2024-06-21 18:13:42,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 150 transitions, 1680 flow [2024-06-21 18:13:42,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:42,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:42,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 18:13:42,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-21 18:13:42,300 INFO L175 Difference]: Start difference. First operand has 128 places, 117 transitions, 1278 flow. Second operand 8 states and 210 transitions. [2024-06-21 18:13:42,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 150 transitions, 1680 flow [2024-06-21 18:13:42,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 150 transitions, 1570 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:42,372 INFO L231 Difference]: Finished difference. Result has 130 places, 104 transitions, 1096 flow [2024-06-21 18:13:42,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1096, PETRI_PLACES=130, PETRI_TRANSITIONS=104} [2024-06-21 18:13:42,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-21 18:13:42,373 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 104 transitions, 1096 flow [2024-06-21 18:13:42,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:42,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:42,373 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 18:13:42,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 18:13:42,373 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:42,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:42,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1977077523, now seen corresponding path program 4 times [2024-06-21 18:13:42,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:42,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840751387] [2024-06-21 18:13:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:42,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:42,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:42,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840751387] [2024-06-21 18:13:42,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840751387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:42,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:42,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:42,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297128708] [2024-06-21 18:13:42,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:42,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:42,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:42,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:42,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:42,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:42,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 104 transitions, 1096 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:42,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:42,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:42,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:42,789 INFO L124 PetriNetUnfolderBase]: 1042/1864 cut-off events. [2024-06-21 18:13:42,789 INFO L125 PetriNetUnfolderBase]: For 24446/24447 co-relation queries the response was YES. [2024-06-21 18:13:42,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8968 conditions, 1864 events. 1042/1864 cut-off events. For 24446/24447 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10896 event pairs, 376 based on Foata normal form. 35/1885 useless extension candidates. Maximal degree in co-relation 8915. Up to 1423 conditions per place. [2024-06-21 18:13:42,800 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 67 selfloop transitions, 43 changer transitions 3/125 dead transitions. [2024-06-21 18:13:42,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 125 transitions, 1396 flow [2024-06-21 18:13:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:42,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 18:13:42,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 18:13:42,801 INFO L175 Difference]: Start difference. First operand has 130 places, 104 transitions, 1096 flow. Second operand 8 states and 200 transitions. [2024-06-21 18:13:42,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 125 transitions, 1396 flow [2024-06-21 18:13:42,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 125 transitions, 1252 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-21 18:13:42,825 INFO L231 Difference]: Finished difference. Result has 118 places, 103 transitions, 1035 flow [2024-06-21 18:13:42,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1035, PETRI_PLACES=118, PETRI_TRANSITIONS=103} [2024-06-21 18:13:42,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-21 18:13:42,825 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 103 transitions, 1035 flow [2024-06-21 18:13:42,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:42,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:42,826 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] [2024-06-21 18:13:42,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 18:13:42,826 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:42,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:42,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1990421907, now seen corresponding path program 1 times [2024-06-21 18:13:42,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:42,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236168276] [2024-06-21 18:13:42,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:42,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:42,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:42,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236168276] [2024-06-21 18:13:42,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236168276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:42,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:42,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:42,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737542997] [2024-06-21 18:13:42,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:42,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:42,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:42,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:42,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:43,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:43,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 103 transitions, 1035 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:43,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:43,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:43,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:43,230 INFO L124 PetriNetUnfolderBase]: 1257/2269 cut-off events. [2024-06-21 18:13:43,231 INFO L125 PetriNetUnfolderBase]: For 27045/27046 co-relation queries the response was YES. [2024-06-21 18:13:43,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10654 conditions, 2269 events. 1257/2269 cut-off events. For 27045/27046 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14063 event pairs, 479 based on Foata normal form. 31/2286 useless extension candidates. Maximal degree in co-relation 10605. Up to 1355 conditions per place. [2024-06-21 18:13:43,244 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 73 selfloop transitions, 42 changer transitions 4/131 dead transitions. [2024-06-21 18:13:43,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 131 transitions, 1421 flow [2024-06-21 18:13:43,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 18:13:43,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 18:13:43,245 INFO L175 Difference]: Start difference. First operand has 118 places, 103 transitions, 1035 flow. Second operand 8 states and 205 transitions. [2024-06-21 18:13:43,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 131 transitions, 1421 flow [2024-06-21 18:13:43,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 131 transitions, 1337 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:43,273 INFO L231 Difference]: Finished difference. Result has 120 places, 102 transitions, 1027 flow [2024-06-21 18:13:43,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1027, PETRI_PLACES=120, PETRI_TRANSITIONS=102} [2024-06-21 18:13:43,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-21 18:13:43,274 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 102 transitions, 1027 flow [2024-06-21 18:13:43,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:43,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:43,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:43,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 18:13:43,275 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:43,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:43,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1606191477, now seen corresponding path program 2 times [2024-06-21 18:13:43,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:43,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487970590] [2024-06-21 18:13:43,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:43,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:43,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:43,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487970590] [2024-06-21 18:13:43,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487970590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:43,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:43,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:43,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495832276] [2024-06-21 18:13:43,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:43,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:43,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:43,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:43,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:43,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:43,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 102 transitions, 1027 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:43,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:43,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:43,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:43,666 INFO L124 PetriNetUnfolderBase]: 1166/2116 cut-off events. [2024-06-21 18:13:43,667 INFO L125 PetriNetUnfolderBase]: For 24712/24721 co-relation queries the response was YES. [2024-06-21 18:13:43,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9671 conditions, 2116 events. 1166/2116 cut-off events. For 24712/24721 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12970 event pairs, 478 based on Foata normal form. 43/2145 useless extension candidates. Maximal degree in co-relation 9621. Up to 1655 conditions per place. [2024-06-21 18:13:43,678 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 67 selfloop transitions, 41 changer transitions 3/123 dead transitions. [2024-06-21 18:13:43,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 123 transitions, 1323 flow [2024-06-21 18:13:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 18:13:43,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 18:13:43,680 INFO L175 Difference]: Start difference. First operand has 120 places, 102 transitions, 1027 flow. Second operand 8 states and 200 transitions. [2024-06-21 18:13:43,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 123 transitions, 1323 flow [2024-06-21 18:13:43,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 123 transitions, 1240 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:43,707 INFO L231 Difference]: Finished difference. Result has 122 places, 101 transitions, 1023 flow [2024-06-21 18:13:43,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1023, PETRI_PLACES=122, PETRI_TRANSITIONS=101} [2024-06-21 18:13:43,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-21 18:13:43,707 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 101 transitions, 1023 flow [2024-06-21 18:13:43,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:43,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:43,708 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 18:13:43,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 18:13:43,708 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 18:13:43,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:43,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1605853143, now seen corresponding path program 5 times [2024-06-21 18:13:43,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:43,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886167222] [2024-06-21 18:13:43,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:43,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:43,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:43,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886167222] [2024-06-21 18:13:43,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886167222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:43,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:43,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:43,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719909351] [2024-06-21 18:13:43,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:43,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:43,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:43,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:43,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:43,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:43,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 101 transitions, 1023 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:43,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:43,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:43,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:44,101 INFO L124 PetriNetUnfolderBase]: 1232/2246 cut-off events. [2024-06-21 18:13:44,101 INFO L125 PetriNetUnfolderBase]: For 26553/26562 co-relation queries the response was YES. [2024-06-21 18:13:44,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10152 conditions, 2246 events. 1232/2246 cut-off events. For 26553/26562 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13937 event pairs, 464 based on Foata normal form. 31/2263 useless extension candidates. Maximal degree in co-relation 10101. Up to 1445 conditions per place. [2024-06-21 18:13:44,114 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 70 selfloop transitions, 40 changer transitions 6/128 dead transitions. [2024-06-21 18:13:44,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 128 transitions, 1367 flow [2024-06-21 18:13:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 18:13:44,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 18:13:44,116 INFO L175 Difference]: Start difference. First operand has 122 places, 101 transitions, 1023 flow. Second operand 8 states and 204 transitions. [2024-06-21 18:13:44,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 128 transitions, 1367 flow [2024-06-21 18:13:44,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 128 transitions, 1287 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:44,143 INFO L231 Difference]: Finished difference. Result has 124 places, 100 transitions, 1013 flow [2024-06-21 18:13:44,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1013, PETRI_PLACES=124, PETRI_TRANSITIONS=100} [2024-06-21 18:13:44,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-21 18:13:44,144 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 100 transitions, 1013 flow [2024-06-21 18:13:44,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:44,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:44,147 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 18:13:44,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 18:13:44,147 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 18:13:44,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:44,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1303415619, now seen corresponding path program 3 times [2024-06-21 18:13:44,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:44,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530828431] [2024-06-21 18:13:44,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:44,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:44,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:44,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530828431] [2024-06-21 18:13:44,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530828431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:44,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:44,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:44,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325927687] [2024-06-21 18:13:44,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:44,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:44,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:44,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:44,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:44,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:44,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 100 transitions, 1013 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:44,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:44,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:44,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:44,659 INFO L124 PetriNetUnfolderBase]: 1447/2617 cut-off events. [2024-06-21 18:13:44,659 INFO L125 PetriNetUnfolderBase]: For 37280/37281 co-relation queries the response was YES. [2024-06-21 18:13:44,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12179 conditions, 2617 events. 1447/2617 cut-off events. For 37280/37281 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16920 event pairs, 489 based on Foata normal form. 37/2632 useless extension candidates. Maximal degree in co-relation 12127. Up to 1593 conditions per place. [2024-06-21 18:13:44,675 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 87 selfloop transitions, 31 changer transitions 3/133 dead transitions. [2024-06-21 18:13:44,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 133 transitions, 1433 flow [2024-06-21 18:13:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:44,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-21 18:13:44,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6951219512195121 [2024-06-21 18:13:44,677 INFO L175 Difference]: Start difference. First operand has 124 places, 100 transitions, 1013 flow. Second operand 6 states and 171 transitions. [2024-06-21 18:13:44,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 133 transitions, 1433 flow [2024-06-21 18:13:44,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 133 transitions, 1354 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:44,711 INFO L231 Difference]: Finished difference. Result has 124 places, 100 transitions, 1000 flow [2024-06-21 18:13:44,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1000, PETRI_PLACES=124, PETRI_TRANSITIONS=100} [2024-06-21 18:13:44,711 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-21 18:13:44,711 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 100 transitions, 1000 flow [2024-06-21 18:13:44,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:44,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:44,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:44,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 18:13:44,712 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 18:13:44,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:44,712 INFO L85 PathProgramCache]: Analyzing trace with hash -106003899, now seen corresponding path program 4 times [2024-06-21 18:13:44,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:44,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065127686] [2024-06-21 18:13:44,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:44,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:44,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:44,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065127686] [2024-06-21 18:13:44,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065127686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:44,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:44,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:44,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076349259] [2024-06-21 18:13:44,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:44,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:44,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:44,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:44,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:44,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:44,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 100 transitions, 1000 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:44,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:44,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:44,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:45,133 INFO L124 PetriNetUnfolderBase]: 1505/2719 cut-off events. [2024-06-21 18:13:45,133 INFO L125 PetriNetUnfolderBase]: For 40813/40814 co-relation queries the response was YES. [2024-06-21 18:13:45,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12704 conditions, 2719 events. 1505/2719 cut-off events. For 40813/40814 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17681 event pairs, 689 based on Foata normal form. 35/2736 useless extension candidates. Maximal degree in co-relation 12651. Up to 2108 conditions per place. [2024-06-21 18:13:45,149 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 67 selfloop transitions, 38 changer transitions 3/120 dead transitions. [2024-06-21 18:13:45,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 120 transitions, 1288 flow [2024-06-21 18:13:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:45,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 18:13:45,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 18:13:45,151 INFO L175 Difference]: Start difference. First operand has 124 places, 100 transitions, 1000 flow. Second operand 7 states and 178 transitions. [2024-06-21 18:13:45,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 120 transitions, 1288 flow [2024-06-21 18:13:45,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 120 transitions, 1216 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:45,186 INFO L231 Difference]: Finished difference. Result has 125 places, 99 transitions, 1003 flow [2024-06-21 18:13:45,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1003, PETRI_PLACES=125, PETRI_TRANSITIONS=99} [2024-06-21 18:13:45,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-21 18:13:45,187 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 99 transitions, 1003 flow [2024-06-21 18:13:45,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:45,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:45,188 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 18:13:45,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 18:13:45,188 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 18:13:45,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:45,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1316748099, now seen corresponding path program 5 times [2024-06-21 18:13:45,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:45,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182075337] [2024-06-21 18:13:45,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:45,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:45,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:45,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182075337] [2024-06-21 18:13:45,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182075337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:45,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:45,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:45,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911750969] [2024-06-21 18:13:45,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:45,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:45,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:45,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:45,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:45,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:45,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 99 transitions, 1003 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:45,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:45,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:45,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:45,790 INFO L124 PetriNetUnfolderBase]: 1434/2614 cut-off events. [2024-06-21 18:13:45,790 INFO L125 PetriNetUnfolderBase]: For 30660/30669 co-relation queries the response was YES. [2024-06-21 18:13:45,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11493 conditions, 2614 events. 1434/2614 cut-off events. For 30660/30669 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17015 event pairs, 608 based on Foata normal form. 43/2643 useless extension candidates. Maximal degree in co-relation 11441. Up to 2121 conditions per place. [2024-06-21 18:13:45,806 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 77 selfloop transitions, 28 changer transitions 1/118 dead transitions. [2024-06-21 18:13:45,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 118 transitions, 1285 flow [2024-06-21 18:13:45,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 18:13:45,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-21 18:13:45,808 INFO L175 Difference]: Start difference. First operand has 125 places, 99 transitions, 1003 flow. Second operand 6 states and 157 transitions. [2024-06-21 18:13:45,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 118 transitions, 1285 flow [2024-06-21 18:13:45,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 118 transitions, 1209 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:45,843 INFO L231 Difference]: Finished difference. Result has 125 places, 98 transitions, 983 flow [2024-06-21 18:13:45,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=983, PETRI_PLACES=125, PETRI_TRANSITIONS=98} [2024-06-21 18:13:45,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-21 18:13:45,844 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 98 transitions, 983 flow [2024-06-21 18:13:45,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:45,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:45,845 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 18:13:45,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 18:13:45,845 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 18:13:45,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:45,845 INFO L85 PathProgramCache]: Analyzing trace with hash -92671419, now seen corresponding path program 6 times [2024-06-21 18:13:45,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:45,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208261401] [2024-06-21 18:13:45,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:45,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:45,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:45,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208261401] [2024-06-21 18:13:45,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208261401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:45,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:45,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:45,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379143086] [2024-06-21 18:13:45,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:45,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:45,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:45,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:45,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:46,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:46,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 98 transitions, 983 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:46,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:46,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:46,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:46,334 INFO L124 PetriNetUnfolderBase]: 1629/2999 cut-off events. [2024-06-21 18:13:46,335 INFO L125 PetriNetUnfolderBase]: For 36572/36581 co-relation queries the response was YES. [2024-06-21 18:13:46,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13283 conditions, 2999 events. 1629/2999 cut-off events. For 36572/36581 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20290 event pairs, 693 based on Foata normal form. 39/3020 useless extension candidates. Maximal degree in co-relation 13231. Up to 1599 conditions per place. [2024-06-21 18:13:46,353 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 73 selfloop transitions, 36 changer transitions 4/125 dead transitions. [2024-06-21 18:13:46,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 125 transitions, 1361 flow [2024-06-21 18:13:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:46,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 18:13:46,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-21 18:13:46,354 INFO L175 Difference]: Start difference. First operand has 125 places, 98 transitions, 983 flow. Second operand 7 states and 183 transitions. [2024-06-21 18:13:46,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 125 transitions, 1361 flow [2024-06-21 18:13:46,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 125 transitions, 1296 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:46,394 INFO L231 Difference]: Finished difference. Result has 126 places, 97 transitions, 986 flow [2024-06-21 18:13:46,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=986, PETRI_PLACES=126, PETRI_TRANSITIONS=97} [2024-06-21 18:13:46,394 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-21 18:13:46,394 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 97 transitions, 986 flow [2024-06-21 18:13:46,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:46,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:46,395 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 18:13:46,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 18:13:46,395 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 18:13:46,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:46,395 INFO L85 PathProgramCache]: Analyzing trace with hash -873531489, now seen corresponding path program 7 times [2024-06-21 18:13:46,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:46,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778461509] [2024-06-21 18:13:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:46,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:46,513 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 18:13:46,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:46,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778461509] [2024-06-21 18:13:46,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778461509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:46,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:46,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:46,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825881296] [2024-06-21 18:13:46,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:46,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:46,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:46,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:46,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:46,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:46,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 97 transitions, 986 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:46,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:46,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:46,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:46,945 INFO L124 PetriNetUnfolderBase]: 1614/3012 cut-off events. [2024-06-21 18:13:46,945 INFO L125 PetriNetUnfolderBase]: For 34346/34355 co-relation queries the response was YES. [2024-06-21 18:13:46,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12801 conditions, 3012 events. 1614/3012 cut-off events. For 34346/34355 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20669 event pairs, 503 based on Foata normal form. 45/3048 useless extension candidates. Maximal degree in co-relation 12749. Up to 1663 conditions per place. [2024-06-21 18:13:46,958 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 83 selfloop transitions, 33 changer transitions 5/133 dead transitions. [2024-06-21 18:13:46,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 133 transitions, 1382 flow [2024-06-21 18:13:46,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:46,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-21 18:13:46,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6759581881533101 [2024-06-21 18:13:46,959 INFO L175 Difference]: Start difference. First operand has 126 places, 97 transitions, 986 flow. Second operand 7 states and 194 transitions. [2024-06-21 18:13:46,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 133 transitions, 1382 flow [2024-06-21 18:13:46,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 133 transitions, 1309 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:46,985 INFO L231 Difference]: Finished difference. Result has 127 places, 96 transitions, 972 flow [2024-06-21 18:13:46,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=972, PETRI_PLACES=127, PETRI_TRANSITIONS=96} [2024-06-21 18:13:46,986 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-21 18:13:46,986 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 96 transitions, 972 flow [2024-06-21 18:13:46,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:46,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:46,986 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 18:13:46,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 18:13:46,987 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 18:13:46,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:46,987 INFO L85 PathProgramCache]: Analyzing trace with hash -476901849, now seen corresponding path program 8 times [2024-06-21 18:13:46,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:46,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973831458] [2024-06-21 18:13:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:46,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:47,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:47,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973831458] [2024-06-21 18:13:47,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973831458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:47,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:47,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:47,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579689732] [2024-06-21 18:13:47,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:47,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:47,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:47,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:47,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:47,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:47,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 96 transitions, 972 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:47,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:47,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:47,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:47,401 INFO L124 PetriNetUnfolderBase]: 1515/2817 cut-off events. [2024-06-21 18:13:47,401 INFO L125 PetriNetUnfolderBase]: For 27332/27333 co-relation queries the response was YES. [2024-06-21 18:13:47,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11629 conditions, 2817 events. 1515/2817 cut-off events. For 27332/27333 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18994 event pairs, 753 based on Foata normal form. 35/2838 useless extension candidates. Maximal degree in co-relation 11577. Up to 2174 conditions per place. [2024-06-21 18:13:47,414 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 66 selfloop transitions, 35 changer transitions 3/116 dead transitions. [2024-06-21 18:13:47,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 116 transitions, 1252 flow [2024-06-21 18:13:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 18:13:47,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 18:13:47,415 INFO L175 Difference]: Start difference. First operand has 127 places, 96 transitions, 972 flow. Second operand 7 states and 177 transitions. [2024-06-21 18:13:47,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 116 transitions, 1252 flow [2024-06-21 18:13:47,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 116 transitions, 1149 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:47,442 INFO L231 Difference]: Finished difference. Result has 126 places, 95 transitions, 938 flow [2024-06-21 18:13:47,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=938, PETRI_PLACES=126, PETRI_TRANSITIONS=95} [2024-06-21 18:13:47,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-21 18:13:47,443 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 95 transitions, 938 flow [2024-06-21 18:13:47,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:47,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:47,443 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 18:13:47,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 18:13:47,444 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 18:13:47,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:47,444 INFO L85 PathProgramCache]: Analyzing trace with hash -477240183, now seen corresponding path program 6 times [2024-06-21 18:13:47,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:47,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362728511] [2024-06-21 18:13:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:47,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:47,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:47,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362728511] [2024-06-21 18:13:47,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362728511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:47,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:47,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:47,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208922827] [2024-06-21 18:13:47,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:47,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:47,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:47,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:47,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:47,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 18:13:47,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 95 transitions, 938 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:47,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:47,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 18:13:47,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:47,850 INFO L124 PetriNetUnfolderBase]: 1452/2720 cut-off events. [2024-06-21 18:13:47,851 INFO L125 PetriNetUnfolderBase]: For 20356/20357 co-relation queries the response was YES. [2024-06-21 18:13:47,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10424 conditions, 2720 events. 1452/2720 cut-off events. For 20356/20357 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18333 event pairs, 604 based on Foata normal form. 31/2733 useless extension candidates. Maximal degree in co-relation 10374. Up to 1293 conditions per place. [2024-06-21 18:13:47,863 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 68 selfloop transitions, 34 changer transitions 7/121 dead transitions. [2024-06-21 18:13:47,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 121 transitions, 1266 flow [2024-06-21 18:13:47,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:47,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 18:13:47,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-21 18:13:47,865 INFO L175 Difference]: Start difference. First operand has 126 places, 95 transitions, 938 flow. Second operand 7 states and 181 transitions. [2024-06-21 18:13:47,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 121 transitions, 1266 flow [2024-06-21 18:13:47,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 121 transitions, 1196 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:47,886 INFO L231 Difference]: Finished difference. Result has 127 places, 93 transitions, 912 flow [2024-06-21 18:13:47,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=912, PETRI_PLACES=127, PETRI_TRANSITIONS=93} [2024-06-21 18:13:47,887 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-21 18:13:47,887 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 93 transitions, 912 flow [2024-06-21 18:13:47,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:47,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:47,887 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 18:13:47,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 18:13:47,888 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 18:13:47,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:47,888 INFO L85 PathProgramCache]: Analyzing trace with hash 754370432, now seen corresponding path program 1 times [2024-06-21 18:13:47,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:47,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627087009] [2024-06-21 18:13:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:47,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:47,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:47,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627087009] [2024-06-21 18:13:47,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627087009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:47,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:47,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:47,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500142703] [2024-06-21 18:13:47,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:47,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:47,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:47,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:47,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:48,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:48,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 93 transitions, 912 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:48,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:48,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:48,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:48,324 INFO L124 PetriNetUnfolderBase]: 1506/2721 cut-off events. [2024-06-21 18:13:48,324 INFO L125 PetriNetUnfolderBase]: For 15203/15218 co-relation queries the response was YES. [2024-06-21 18:13:48,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10171 conditions, 2721 events. 1506/2721 cut-off events. For 15203/15218 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17853 event pairs, 378 based on Foata normal form. 6/2705 useless extension candidates. Maximal degree in co-relation 10121. Up to 2194 conditions per place. [2024-06-21 18:13:48,334 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 72 selfloop transitions, 21 changer transitions 45/146 dead transitions. [2024-06-21 18:13:48,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 146 transitions, 1594 flow [2024-06-21 18:13:48,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:48,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 18:13:48,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 18:13:48,335 INFO L175 Difference]: Start difference. First operand has 127 places, 93 transitions, 912 flow. Second operand 8 states and 196 transitions. [2024-06-21 18:13:48,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 146 transitions, 1594 flow [2024-06-21 18:13:48,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 146 transitions, 1421 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:48,358 INFO L231 Difference]: Finished difference. Result has 131 places, 70 transitions, 649 flow [2024-06-21 18:13:48,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=649, PETRI_PLACES=131, PETRI_TRANSITIONS=70} [2024-06-21 18:13:48,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-21 18:13:48,359 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 70 transitions, 649 flow [2024-06-21 18:13:48,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:48,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:48,359 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 18:13:48,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 18:13:48,360 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 18:13:48,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:48,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1424040106, now seen corresponding path program 2 times [2024-06-21 18:13:48,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:48,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620534259] [2024-06-21 18:13:48,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:48,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:48,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:48,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620534259] [2024-06-21 18:13:48,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620534259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:48,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:48,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:48,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525689886] [2024-06-21 18:13:48,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:48,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:48,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:48,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:48,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:48,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:48,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 70 transitions, 649 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:48,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:48,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:48,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:48,643 INFO L124 PetriNetUnfolderBase]: 565/1039 cut-off events. [2024-06-21 18:13:48,643 INFO L125 PetriNetUnfolderBase]: For 10927/10930 co-relation queries the response was YES. [2024-06-21 18:13:48,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4563 conditions, 1039 events. 565/1039 cut-off events. For 10927/10930 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5115 event pairs, 212 based on Foata normal form. 6/1036 useless extension candidates. Maximal degree in co-relation 4523. Up to 788 conditions per place. [2024-06-21 18:13:48,649 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 70 selfloop transitions, 19 changer transitions 0/97 dead transitions. [2024-06-21 18:13:48,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 97 transitions, 940 flow [2024-06-21 18:13:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-21 18:13:48,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-21 18:13:48,650 INFO L175 Difference]: Start difference. First operand has 131 places, 70 transitions, 649 flow. Second operand 8 states and 177 transitions. [2024-06-21 18:13:48,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 97 transitions, 940 flow [2024-06-21 18:13:48,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 97 transitions, 816 flow, removed 28 selfloop flow, removed 18 redundant places. [2024-06-21 18:13:48,659 INFO L231 Difference]: Finished difference. Result has 100 places, 74 transitions, 629 flow [2024-06-21 18:13:48,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=629, PETRI_PLACES=100, PETRI_TRANSITIONS=74} [2024-06-21 18:13:48,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-21 18:13:48,659 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 74 transitions, 629 flow [2024-06-21 18:13:48,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:48,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:48,660 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 18:13:48,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 18:13:48,661 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 18:13:48,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:48,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1562568256, now seen corresponding path program 3 times [2024-06-21 18:13:48,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:48,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369755147] [2024-06-21 18:13:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:48,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:48,784 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 18:13:48,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:48,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369755147] [2024-06-21 18:13:48,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369755147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:48,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:48,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:48,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102331635] [2024-06-21 18:13:48,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:48,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:48,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:48,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:48,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:48,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:48,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 74 transitions, 629 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:48,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:48,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:48,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:48,975 INFO L124 PetriNetUnfolderBase]: 602/1097 cut-off events. [2024-06-21 18:13:48,975 INFO L125 PetriNetUnfolderBase]: For 5401/5401 co-relation queries the response was YES. [2024-06-21 18:13:48,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4390 conditions, 1097 events. 602/1097 cut-off events. For 5401/5401 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5459 event pairs, 233 based on Foata normal form. 6/1089 useless extension candidates. Maximal degree in co-relation 4359. Up to 834 conditions per place. [2024-06-21 18:13:48,980 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 73 selfloop transitions, 25 changer transitions 0/106 dead transitions. [2024-06-21 18:13:48,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 106 transitions, 1009 flow [2024-06-21 18:13:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-21 18:13:48,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-21 18:13:48,981 INFO L175 Difference]: Start difference. First operand has 100 places, 74 transitions, 629 flow. Second operand 9 states and 189 transitions. [2024-06-21 18:13:48,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 106 transitions, 1009 flow [2024-06-21 18:13:48,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 106 transitions, 953 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:48,987 INFO L231 Difference]: Finished difference. Result has 107 places, 84 transitions, 772 flow [2024-06-21 18:13:48,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=772, PETRI_PLACES=107, PETRI_TRANSITIONS=84} [2024-06-21 18:13:48,988 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-21 18:13:48,988 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 84 transitions, 772 flow [2024-06-21 18:13:48,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:48,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:48,988 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 18:13:48,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 18:13:48,989 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 18:13:48,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:48,989 INFO L85 PathProgramCache]: Analyzing trace with hash -925440770, now seen corresponding path program 4 times [2024-06-21 18:13:48,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:48,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267429205] [2024-06-21 18:13:48,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:48,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:49,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:49,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267429205] [2024-06-21 18:13:49,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267429205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:49,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:49,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:49,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206007421] [2024-06-21 18:13:49,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:49,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:49,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:49,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:49,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:49,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:49,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 84 transitions, 772 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:49,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:49,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:49,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:49,327 INFO L124 PetriNetUnfolderBase]: 630/1157 cut-off events. [2024-06-21 18:13:49,327 INFO L125 PetriNetUnfolderBase]: For 6324/6327 co-relation queries the response was YES. [2024-06-21 18:13:49,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4735 conditions, 1157 events. 630/1157 cut-off events. For 6324/6327 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5791 event pairs, 218 based on Foata normal form. 6/1154 useless extension candidates. Maximal degree in co-relation 4700. Up to 848 conditions per place. [2024-06-21 18:13:49,333 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 73 selfloop transitions, 28 changer transitions 0/109 dead transitions. [2024-06-21 18:13:49,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 109 transitions, 1088 flow [2024-06-21 18:13:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:49,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-21 18:13:49,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-21 18:13:49,334 INFO L175 Difference]: Start difference. First operand has 107 places, 84 transitions, 772 flow. Second operand 8 states and 175 transitions. [2024-06-21 18:13:49,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 109 transitions, 1088 flow [2024-06-21 18:13:49,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 109 transitions, 1047 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:49,344 INFO L231 Difference]: Finished difference. Result has 115 places, 88 transitions, 871 flow [2024-06-21 18:13:49,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=871, PETRI_PLACES=115, PETRI_TRANSITIONS=88} [2024-06-21 18:13:49,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-21 18:13:49,345 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 88 transitions, 871 flow [2024-06-21 18:13:49,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:49,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:49,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:49,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 18:13:49,345 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 18:13:49,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:49,346 INFO L85 PathProgramCache]: Analyzing trace with hash 455304092, now seen corresponding path program 5 times [2024-06-21 18:13:49,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:49,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012697815] [2024-06-21 18:13:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:49,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:49,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:49,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012697815] [2024-06-21 18:13:49,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012697815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:49,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:49,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:49,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869046665] [2024-06-21 18:13:49,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:49,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:49,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:49,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:49,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:49,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:49,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 88 transitions, 871 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:49,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:49,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:49,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:49,636 INFO L124 PetriNetUnfolderBase]: 691/1251 cut-off events. [2024-06-21 18:13:49,636 INFO L125 PetriNetUnfolderBase]: For 8217/8220 co-relation queries the response was YES. [2024-06-21 18:13:49,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5322 conditions, 1251 events. 691/1251 cut-off events. For 8217/8220 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6372 event pairs, 254 based on Foata normal form. 8/1243 useless extension candidates. Maximal degree in co-relation 5284. Up to 908 conditions per place. [2024-06-21 18:13:49,643 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 84 selfloop transitions, 28 changer transitions 0/120 dead transitions. [2024-06-21 18:13:49,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 120 transitions, 1271 flow [2024-06-21 18:13:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:49,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 18:13:49,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-21 18:13:49,644 INFO L175 Difference]: Start difference. First operand has 115 places, 88 transitions, 871 flow. Second operand 8 states and 181 transitions. [2024-06-21 18:13:49,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 120 transitions, 1271 flow [2024-06-21 18:13:49,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 120 transitions, 1195 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:49,655 INFO L231 Difference]: Finished difference. Result has 121 places, 93 transitions, 949 flow [2024-06-21 18:13:49,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=949, PETRI_PLACES=121, PETRI_TRANSITIONS=93} [2024-06-21 18:13:49,655 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-21 18:13:49,656 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 93 transitions, 949 flow [2024-06-21 18:13:49,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:49,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:49,656 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 18:13:49,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 18:13:49,656 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 18:13:49,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:49,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1618055564, now seen corresponding path program 6 times [2024-06-21 18:13:49,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:49,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711715526] [2024-06-21 18:13:49,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:49,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:49,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:49,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711715526] [2024-06-21 18:13:49,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711715526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:49,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:49,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:49,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102537] [2024-06-21 18:13:49,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:49,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:49,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:49,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:49,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:49,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:49,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 93 transitions, 949 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:49,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:49,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:49,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:49,962 INFO L124 PetriNetUnfolderBase]: 719/1304 cut-off events. [2024-06-21 18:13:49,962 INFO L125 PetriNetUnfolderBase]: For 8307/8310 co-relation queries the response was YES. [2024-06-21 18:13:49,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5555 conditions, 1304 events. 719/1304 cut-off events. For 8307/8310 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6694 event pairs, 267 based on Foata normal form. 8/1301 useless extension candidates. Maximal degree in co-relation 5514. Up to 1017 conditions per place. [2024-06-21 18:13:49,969 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 82 selfloop transitions, 25 changer transitions 0/115 dead transitions. [2024-06-21 18:13:49,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 115 transitions, 1255 flow [2024-06-21 18:13:49,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:49,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:49,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-21 18:13:49,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-21 18:13:49,970 INFO L175 Difference]: Start difference. First operand has 121 places, 93 transitions, 949 flow. Second operand 8 states and 172 transitions. [2024-06-21 18:13:49,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 115 transitions, 1255 flow [2024-06-21 18:13:49,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 115 transitions, 1218 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-21 18:13:49,981 INFO L231 Difference]: Finished difference. Result has 129 places, 96 transitions, 1017 flow [2024-06-21 18:13:49,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1017, PETRI_PLACES=129, PETRI_TRANSITIONS=96} [2024-06-21 18:13:49,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-21 18:13:49,982 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 96 transitions, 1017 flow [2024-06-21 18:13:49,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:49,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:49,982 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 18:13:49,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 18:13:49,982 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 18:13:49,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:49,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1468811660, now seen corresponding path program 7 times [2024-06-21 18:13:49,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:49,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146733708] [2024-06-21 18:13:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:49,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:50,085 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 18:13:50,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:50,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146733708] [2024-06-21 18:13:50,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146733708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:50,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:50,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:50,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714068698] [2024-06-21 18:13:50,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:50,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:50,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:50,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:50,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:50,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:50,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 96 transitions, 1017 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:50,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:50,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:50,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:50,299 INFO L124 PetriNetUnfolderBase]: 747/1374 cut-off events. [2024-06-21 18:13:50,299 INFO L125 PetriNetUnfolderBase]: For 9044/9047 co-relation queries the response was YES. [2024-06-21 18:13:50,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5833 conditions, 1374 events. 747/1374 cut-off events. For 9044/9047 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7233 event pairs, 169 based on Foata normal form. 8/1376 useless extension candidates. Maximal degree in co-relation 5789. Up to 621 conditions per place. [2024-06-21 18:13:50,307 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 74 selfloop transitions, 47 changer transitions 0/129 dead transitions. [2024-06-21 18:13:50,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 129 transitions, 1427 flow [2024-06-21 18:13:50,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:50,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:50,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 18:13:50,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-21 18:13:50,309 INFO L175 Difference]: Start difference. First operand has 129 places, 96 transitions, 1017 flow. Second operand 8 states and 185 transitions. [2024-06-21 18:13:50,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 129 transitions, 1427 flow [2024-06-21 18:13:50,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 129 transitions, 1368 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:50,322 INFO L231 Difference]: Finished difference. Result has 134 places, 99 transitions, 1087 flow [2024-06-21 18:13:50,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1087, PETRI_PLACES=134, PETRI_TRANSITIONS=99} [2024-06-21 18:13:50,323 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-21 18:13:50,323 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 99 transitions, 1087 flow [2024-06-21 18:13:50,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:50,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:50,323 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 18:13:50,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 18:13:50,323 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 18:13:50,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:50,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1084581230, now seen corresponding path program 8 times [2024-06-21 18:13:50,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:50,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042974202] [2024-06-21 18:13:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:50,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:50,450 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 18:13:50,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:50,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042974202] [2024-06-21 18:13:50,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042974202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:50,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:50,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:50,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087798324] [2024-06-21 18:13:50,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:50,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:50,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:50,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:50,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:50,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:50,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 99 transitions, 1087 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:50,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:50,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:50,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:50,678 INFO L124 PetriNetUnfolderBase]: 795/1458 cut-off events. [2024-06-21 18:13:50,679 INFO L125 PetriNetUnfolderBase]: For 10887/10890 co-relation queries the response was YES. [2024-06-21 18:13:50,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6404 conditions, 1458 events. 795/1458 cut-off events. For 10887/10890 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7818 event pairs, 213 based on Foata normal form. 8/1458 useless extension candidates. Maximal degree in co-relation 6358. Up to 1151 conditions per place. [2024-06-21 18:13:50,686 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 105 selfloop transitions, 19 changer transitions 0/132 dead transitions. [2024-06-21 18:13:50,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 132 transitions, 1465 flow [2024-06-21 18:13:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-21 18:13:50,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-21 18:13:50,688 INFO L175 Difference]: Start difference. First operand has 134 places, 99 transitions, 1087 flow. Second operand 8 states and 184 transitions. [2024-06-21 18:13:50,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 132 transitions, 1465 flow [2024-06-21 18:13:50,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 132 transitions, 1328 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:50,704 INFO L231 Difference]: Finished difference. Result has 137 places, 103 transitions, 1043 flow [2024-06-21 18:13:50,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1043, PETRI_PLACES=137, PETRI_TRANSITIONS=103} [2024-06-21 18:13:50,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-21 18:13:50,704 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 103 transitions, 1043 flow [2024-06-21 18:13:50,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:50,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:50,705 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 18:13:50,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 18:13:50,705 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 18:13:50,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:50,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1898239674, now seen corresponding path program 9 times [2024-06-21 18:13:50,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:50,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052703742] [2024-06-21 18:13:50,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:50,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:50,807 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 18:13:50,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:50,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052703742] [2024-06-21 18:13:50,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052703742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:50,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:50,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:50,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669032832] [2024-06-21 18:13:50,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:50,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:50,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:50,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:50,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:50,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:50,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 103 transitions, 1043 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:50,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:50,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:50,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:51,011 INFO L124 PetriNetUnfolderBase]: 823/1509 cut-off events. [2024-06-21 18:13:51,012 INFO L125 PetriNetUnfolderBase]: For 10755/10758 co-relation queries the response was YES. [2024-06-21 18:13:51,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6175 conditions, 1509 events. 823/1509 cut-off events. For 10755/10758 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8196 event pairs, 179 based on Foata normal form. 8/1511 useless extension candidates. Maximal degree in co-relation 6129. Up to 649 conditions per place. [2024-06-21 18:13:51,020 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 74 selfloop transitions, 52 changer transitions 0/134 dead transitions. [2024-06-21 18:13:51,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 134 transitions, 1441 flow [2024-06-21 18:13:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:51,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:51,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 18:13:51,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-21 18:13:51,022 INFO L175 Difference]: Start difference. First operand has 137 places, 103 transitions, 1043 flow. Second operand 8 states and 183 transitions. [2024-06-21 18:13:51,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 134 transitions, 1441 flow [2024-06-21 18:13:51,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 134 transitions, 1348 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:51,040 INFO L231 Difference]: Finished difference. Result has 140 places, 106 transitions, 1093 flow [2024-06-21 18:13:51,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1093, PETRI_PLACES=140, PETRI_TRANSITIONS=106} [2024-06-21 18:13:51,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-21 18:13:51,040 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 106 transitions, 1093 flow [2024-06-21 18:13:51,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:51,041 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 18:13:51,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 18:13:51,041 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 18:13:51,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:51,041 INFO L85 PathProgramCache]: Analyzing trace with hash 716284720, now seen corresponding path program 10 times [2024-06-21 18:13:51,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:51,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175901716] [2024-06-21 18:13:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:51,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:51,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:51,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175901716] [2024-06-21 18:13:51,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175901716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:51,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:51,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:51,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010520651] [2024-06-21 18:13:51,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:51,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:51,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:51,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:51,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:51,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:51,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 106 transitions, 1093 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:51,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:51,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:51,416 INFO L124 PetriNetUnfolderBase]: 874/1598 cut-off events. [2024-06-21 18:13:51,417 INFO L125 PetriNetUnfolderBase]: For 12140/12143 co-relation queries the response was YES. [2024-06-21 18:13:51,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6733 conditions, 1598 events. 874/1598 cut-off events. For 12140/12143 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8819 event pairs, 286 based on Foata normal form. 8/1598 useless extension candidates. Maximal degree in co-relation 6687. Up to 1325 conditions per place. [2024-06-21 18:13:51,424 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 109 selfloop transitions, 18 changer transitions 0/135 dead transitions. [2024-06-21 18:13:51,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 135 transitions, 1482 flow [2024-06-21 18:13:51,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:51,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-21 18:13:51,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-21 18:13:51,425 INFO L175 Difference]: Start difference. First operand has 140 places, 106 transitions, 1093 flow. Second operand 8 states and 178 transitions. [2024-06-21 18:13:51,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 135 transitions, 1482 flow [2024-06-21 18:13:51,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 135 transitions, 1402 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:51,442 INFO L231 Difference]: Finished difference. Result has 146 places, 112 transitions, 1135 flow [2024-06-21 18:13:51,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1135, PETRI_PLACES=146, PETRI_TRANSITIONS=112} [2024-06-21 18:13:51,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-21 18:13:51,442 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 112 transitions, 1135 flow [2024-06-21 18:13:51,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:51,443 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 18:13:51,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 18:13:51,443 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 18:13:51,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:51,443 INFO L85 PathProgramCache]: Analyzing trace with hash 715839250, now seen corresponding path program 11 times [2024-06-21 18:13:51,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:51,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53117542] [2024-06-21 18:13:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:51,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:51,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:51,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:51,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53117542] [2024-06-21 18:13:51,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53117542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:51,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:51,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:51,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622373210] [2024-06-21 18:13:51,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:51,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:51,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:51,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:51,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:51,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:51,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 112 transitions, 1135 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:51,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:51,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:51,754 INFO L124 PetriNetUnfolderBase]: 944/1721 cut-off events. [2024-06-21 18:13:51,755 INFO L125 PetriNetUnfolderBase]: For 14936/14939 co-relation queries the response was YES. [2024-06-21 18:13:51,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7196 conditions, 1721 events. 944/1721 cut-off events. For 14936/14939 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9656 event pairs, 336 based on Foata normal form. 8/1716 useless extension candidates. Maximal degree in co-relation 7147. Up to 1201 conditions per place. [2024-06-21 18:13:51,764 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 97 selfloop transitions, 36 changer transitions 0/141 dead transitions. [2024-06-21 18:13:51,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 141 transitions, 1599 flow [2024-06-21 18:13:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:51,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:51,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-21 18:13:51,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-21 18:13:51,765 INFO L175 Difference]: Start difference. First operand has 146 places, 112 transitions, 1135 flow. Second operand 8 states and 177 transitions. [2024-06-21 18:13:51,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 141 transitions, 1599 flow [2024-06-21 18:13:51,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 141 transitions, 1552 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:51,787 INFO L231 Difference]: Finished difference. Result has 153 places, 118 transitions, 1271 flow [2024-06-21 18:13:51,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1271, PETRI_PLACES=153, PETRI_TRANSITIONS=118} [2024-06-21 18:13:51,788 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-21 18:13:51,788 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 118 transitions, 1271 flow [2024-06-21 18:13:51,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:51,788 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 18:13:51,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 18:13:51,788 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 18:13:51,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:51,789 INFO L85 PathProgramCache]: Analyzing trace with hash 705719920, now seen corresponding path program 12 times [2024-06-21 18:13:51,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:51,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607828476] [2024-06-21 18:13:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:51,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:51,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:51,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607828476] [2024-06-21 18:13:51,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607828476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:51,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:51,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:51,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617922001] [2024-06-21 18:13:51,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:51,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:51,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:51,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:51,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:51,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:51,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 118 transitions, 1271 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:51,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:51,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:52,124 INFO L124 PetriNetUnfolderBase]: 931/1700 cut-off events. [2024-06-21 18:13:52,124 INFO L125 PetriNetUnfolderBase]: For 15203/15206 co-relation queries the response was YES. [2024-06-21 18:13:52,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7223 conditions, 1700 events. 931/1700 cut-off events. For 15203/15206 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9565 event pairs, 345 based on Foata normal form. 8/1697 useless extension candidates. Maximal degree in co-relation 7171. Up to 1349 conditions per place. [2024-06-21 18:13:52,133 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 99 selfloop transitions, 28 changer transitions 0/135 dead transitions. [2024-06-21 18:13:52,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 135 transitions, 1583 flow [2024-06-21 18:13:52,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:52,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-21 18:13:52,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2024-06-21 18:13:52,134 INFO L175 Difference]: Start difference. First operand has 153 places, 118 transitions, 1271 flow. Second operand 8 states and 169 transitions. [2024-06-21 18:13:52,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 135 transitions, 1583 flow [2024-06-21 18:13:52,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 135 transitions, 1532 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:52,157 INFO L231 Difference]: Finished difference. Result has 160 places, 119 transitions, 1301 flow [2024-06-21 18:13:52,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1301, PETRI_PLACES=160, PETRI_TRANSITIONS=119} [2024-06-21 18:13:52,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-21 18:13:52,158 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 119 transitions, 1301 flow [2024-06-21 18:13:52,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:52,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:52,158 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 18:13:52,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 18:13:52,158 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 18:13:52,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:52,159 INFO L85 PathProgramCache]: Analyzing trace with hash -404956450, now seen corresponding path program 13 times [2024-06-21 18:13:52,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:52,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18873656] [2024-06-21 18:13:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:52,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:52,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:52,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18873656] [2024-06-21 18:13:52,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18873656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:52,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:52,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:52,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242952224] [2024-06-21 18:13:52,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:52,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:52,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:52,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:52,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:52,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:52,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 119 transitions, 1301 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:52,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:52,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:52,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:52,661 INFO L124 PetriNetUnfolderBase]: 918/1680 cut-off events. [2024-06-21 18:13:52,661 INFO L125 PetriNetUnfolderBase]: For 14541/14544 co-relation queries the response was YES. [2024-06-21 18:13:52,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6971 conditions, 1680 events. 918/1680 cut-off events. For 14541/14544 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9408 event pairs, 294 based on Foata normal form. 6/1672 useless extension candidates. Maximal degree in co-relation 6917. Up to 1190 conditions per place. [2024-06-21 18:13:52,673 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 95 selfloop transitions, 42 changer transitions 0/145 dead transitions. [2024-06-21 18:13:52,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 145 transitions, 1661 flow [2024-06-21 18:13:52,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:52,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:52,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 18:13:52,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 18:13:52,676 INFO L175 Difference]: Start difference. First operand has 160 places, 119 transitions, 1301 flow. Second operand 7 states and 164 transitions. [2024-06-21 18:13:52,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 145 transitions, 1661 flow [2024-06-21 18:13:52,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 145 transitions, 1573 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:52,700 INFO L231 Difference]: Finished difference. Result has 162 places, 120 transitions, 1345 flow [2024-06-21 18:13:52,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1345, PETRI_PLACES=162, PETRI_TRANSITIONS=120} [2024-06-21 18:13:52,701 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-21 18:13:52,701 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 120 transitions, 1345 flow [2024-06-21 18:13:52,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:52,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:52,701 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 18:13:52,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 18:13:52,701 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 18:13:52,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:52,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1070949230, now seen corresponding path program 14 times [2024-06-21 18:13:52,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:52,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84352348] [2024-06-21 18:13:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:52,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:52,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:52,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84352348] [2024-06-21 18:13:52,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84352348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:52,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:52,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:52,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818954330] [2024-06-21 18:13:52,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:52,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:52,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:52,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:52,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:52,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:52,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 120 transitions, 1345 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:52,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:52,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:52,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:53,091 INFO L124 PetriNetUnfolderBase]: 957/1755 cut-off events. [2024-06-21 18:13:53,092 INFO L125 PetriNetUnfolderBase]: For 16310/16310 co-relation queries the response was YES. [2024-06-21 18:13:53,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7568 conditions, 1755 events. 957/1755 cut-off events. For 16310/16310 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10026 event pairs, 343 based on Foata normal form. 6/1746 useless extension candidates. Maximal degree in co-relation 7512. Up to 1382 conditions per place. [2024-06-21 18:13:53,103 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 107 selfloop transitions, 36 changer transitions 0/151 dead transitions. [2024-06-21 18:13:53,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 151 transitions, 1884 flow [2024-06-21 18:13:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:53,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-21 18:13:53,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-21 18:13:53,104 INFO L175 Difference]: Start difference. First operand has 162 places, 120 transitions, 1345 flow. Second operand 9 states and 187 transitions. [2024-06-21 18:13:53,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 151 transitions, 1884 flow [2024-06-21 18:13:53,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 151 transitions, 1784 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:53,131 INFO L231 Difference]: Finished difference. Result has 169 places, 133 transitions, 1552 flow [2024-06-21 18:13:53,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1552, PETRI_PLACES=169, PETRI_TRANSITIONS=133} [2024-06-21 18:13:53,132 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-21 18:13:53,132 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 133 transitions, 1552 flow [2024-06-21 18:13:53,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:53,132 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 18:13:53,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 18:13:53,132 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 18:13:53,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:53,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1209260124, now seen corresponding path program 15 times [2024-06-21 18:13:53,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:53,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578951642] [2024-06-21 18:13:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:53,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:53,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:53,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578951642] [2024-06-21 18:13:53,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578951642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:53,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:53,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:53,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485761497] [2024-06-21 18:13:53,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:53,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:53,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:53,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:53,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:53,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:53,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 133 transitions, 1552 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:53,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:53,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:53,493 INFO L124 PetriNetUnfolderBase]: 944/1740 cut-off events. [2024-06-21 18:13:53,493 INFO L125 PetriNetUnfolderBase]: For 13809/13815 co-relation queries the response was YES. [2024-06-21 18:13:53,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7296 conditions, 1740 events. 944/1740 cut-off events. For 13809/13815 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9977 event pairs, 307 based on Foata normal form. 10/1734 useless extension candidates. Maximal degree in co-relation 7237. Up to 1223 conditions per place. [2024-06-21 18:13:53,505 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 98 selfloop transitions, 48 changer transitions 0/154 dead transitions. [2024-06-21 18:13:53,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 154 transitions, 1900 flow [2024-06-21 18:13:53,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:53,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:53,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-21 18:13:53,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-21 18:13:53,506 INFO L175 Difference]: Start difference. First operand has 169 places, 133 transitions, 1552 flow. Second operand 7 states and 159 transitions. [2024-06-21 18:13:53,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 154 transitions, 1900 flow [2024-06-21 18:13:53,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 154 transitions, 1842 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-21 18:13:53,533 INFO L231 Difference]: Finished difference. Result has 175 places, 133 transitions, 1602 flow [2024-06-21 18:13:53,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1602, PETRI_PLACES=175, PETRI_TRANSITIONS=133} [2024-06-21 18:13:53,533 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-21 18:13:53,533 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 133 transitions, 1602 flow [2024-06-21 18:13:53,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:53,534 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 18:13:53,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 18:13:53,534 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 18:13:53,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:53,534 INFO L85 PathProgramCache]: Analyzing trace with hash 111347506, now seen corresponding path program 16 times [2024-06-21 18:13:53,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:53,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768286855] [2024-06-21 18:13:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:53,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:53,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:53,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768286855] [2024-06-21 18:13:53,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768286855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:53,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:53,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:53,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599327095] [2024-06-21 18:13:53,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:53,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:53,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:53,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:53,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:53,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:53,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 133 transitions, 1602 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:53,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:53,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:53,946 INFO L124 PetriNetUnfolderBase]: 964/1808 cut-off events. [2024-06-21 18:13:53,946 INFO L125 PetriNetUnfolderBase]: For 14815/14821 co-relation queries the response was YES. [2024-06-21 18:13:53,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7592 conditions, 1808 events. 964/1808 cut-off events. For 14815/14821 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10492 event pairs, 204 based on Foata normal form. 10/1815 useless extension candidates. Maximal degree in co-relation 7532. Up to 1329 conditions per place. [2024-06-21 18:13:53,956 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 122 selfloop transitions, 29 changer transitions 0/159 dead transitions. [2024-06-21 18:13:53,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 159 transitions, 1997 flow [2024-06-21 18:13:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:53,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 18:13:53,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-21 18:13:53,957 INFO L175 Difference]: Start difference. First operand has 175 places, 133 transitions, 1602 flow. Second operand 7 states and 163 transitions. [2024-06-21 18:13:53,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 159 transitions, 1997 flow [2024-06-21 18:13:53,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 159 transitions, 1859 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:53,984 INFO L231 Difference]: Finished difference. Result has 174 places, 134 transitions, 1550 flow [2024-06-21 18:13:53,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1550, PETRI_PLACES=174, PETRI_TRANSITIONS=134} [2024-06-21 18:13:53,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-21 18:13:53,985 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 134 transitions, 1550 flow [2024-06-21 18:13:53,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:53,985 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 18:13:53,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 18:13:53,985 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 18:13:53,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:53,986 INFO L85 PathProgramCache]: Analyzing trace with hash 111334486, now seen corresponding path program 17 times [2024-06-21 18:13:53,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:53,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759965166] [2024-06-21 18:13:53,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:53,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:54,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:54,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759965166] [2024-06-21 18:13:54,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759965166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:54,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:54,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:54,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550422251] [2024-06-21 18:13:54,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:54,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:54,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:54,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:54,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:54,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 134 transitions, 1550 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:54,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:54,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:54,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:54,373 INFO L124 PetriNetUnfolderBase]: 951/1784 cut-off events. [2024-06-21 18:13:54,373 INFO L125 PetriNetUnfolderBase]: For 12487/12493 co-relation queries the response was YES. [2024-06-21 18:13:54,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7249 conditions, 1784 events. 951/1784 cut-off events. For 12487/12493 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10365 event pairs, 178 based on Foata normal form. 10/1788 useless extension candidates. Maximal degree in co-relation 7191. Up to 703 conditions per place. [2024-06-21 18:13:54,381 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 79 selfloop transitions, 73 changer transitions 0/160 dead transitions. [2024-06-21 18:13:54,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 160 transitions, 1932 flow [2024-06-21 18:13:54,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:54,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 18:13:54,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 18:13:54,382 INFO L175 Difference]: Start difference. First operand has 174 places, 134 transitions, 1550 flow. Second operand 7 states and 164 transitions. [2024-06-21 18:13:54,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 160 transitions, 1932 flow [2024-06-21 18:13:54,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 160 transitions, 1775 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:54,406 INFO L231 Difference]: Finished difference. Result has 174 places, 134 transitions, 1549 flow [2024-06-21 18:13:54,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1549, PETRI_PLACES=174, PETRI_TRANSITIONS=134} [2024-06-21 18:13:54,407 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-21 18:13:54,407 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 134 transitions, 1549 flow [2024-06-21 18:13:54,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:54,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:54,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:54,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 18:13:54,407 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 18:13:54,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash -476898989, now seen corresponding path program 1 times [2024-06-21 18:13:54,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:54,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115301610] [2024-06-21 18:13:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:54,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:54,515 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 18:13:54,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:54,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115301610] [2024-06-21 18:13:54,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115301610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:54,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:54,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:54,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993492173] [2024-06-21 18:13:54,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:54,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:54,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:54,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:54,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:54,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:54,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 134 transitions, 1549 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:54,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:54,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:54,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:54,779 INFO L124 PetriNetUnfolderBase]: 1120/2077 cut-off events. [2024-06-21 18:13:54,779 INFO L125 PetriNetUnfolderBase]: For 16124/16130 co-relation queries the response was YES. [2024-06-21 18:13:54,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8397 conditions, 2077 events. 1120/2077 cut-off events. For 16124/16130 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12325 event pairs, 322 based on Foata normal form. 19/2087 useless extension candidates. Maximal degree in co-relation 8341. Up to 1071 conditions per place. [2024-06-21 18:13:54,790 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 112 selfloop transitions, 43 changer transitions 16/179 dead transitions. [2024-06-21 18:13:54,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 179 transitions, 2074 flow [2024-06-21 18:13:54,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-21 18:13:54,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-21 18:13:54,791 INFO L175 Difference]: Start difference. First operand has 174 places, 134 transitions, 1549 flow. Second operand 9 states and 214 transitions. [2024-06-21 18:13:54,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 179 transitions, 2074 flow [2024-06-21 18:13:54,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 179 transitions, 1912 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:54,814 INFO L231 Difference]: Finished difference. Result has 177 places, 132 transitions, 1469 flow [2024-06-21 18:13:54,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1469, PETRI_PLACES=177, PETRI_TRANSITIONS=132} [2024-06-21 18:13:54,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-21 18:13:54,815 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 132 transitions, 1469 flow [2024-06-21 18:13:54,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:54,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:54,815 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, 1, 1] [2024-06-21 18:13:54,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 18:13:54,816 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 18:13:54,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:54,816 INFO L85 PathProgramCache]: Analyzing trace with hash -899461025, now seen corresponding path program 2 times [2024-06-21 18:13:54,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:54,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835618216] [2024-06-21 18:13:54,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:54,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:54,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:54,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835618216] [2024-06-21 18:13:54,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835618216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:54,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:54,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:54,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765003732] [2024-06-21 18:13:54,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:54,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:54,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:54,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:54,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:54,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:54,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 132 transitions, 1469 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:54,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:54,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:54,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:55,220 INFO L124 PetriNetUnfolderBase]: 1150/2133 cut-off events. [2024-06-21 18:13:55,220 INFO L125 PetriNetUnfolderBase]: For 14272/14278 co-relation queries the response was YES. [2024-06-21 18:13:55,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8388 conditions, 2133 events. 1150/2133 cut-off events. For 14272/14278 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12738 event pairs, 395 based on Foata normal form. 19/2143 useless extension candidates. Maximal degree in co-relation 8332. Up to 1071 conditions per place. [2024-06-21 18:13:55,231 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 126 selfloop transitions, 35 changer transitions 8/177 dead transitions. [2024-06-21 18:13:55,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 177 transitions, 2018 flow [2024-06-21 18:13:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:55,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:55,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-21 18:13:55,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-21 18:13:55,232 INFO L175 Difference]: Start difference. First operand has 177 places, 132 transitions, 1469 flow. Second operand 9 states and 214 transitions. [2024-06-21 18:13:55,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 177 transitions, 2018 flow [2024-06-21 18:13:55,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 177 transitions, 1930 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:55,253 INFO L231 Difference]: Finished difference. Result has 177 places, 131 transitions, 1454 flow [2024-06-21 18:13:55,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1454, PETRI_PLACES=177, PETRI_TRANSITIONS=131} [2024-06-21 18:13:55,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-21 18:13:55,254 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 131 transitions, 1454 flow [2024-06-21 18:13:55,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:55,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:55,254 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, 1, 1] [2024-06-21 18:13:55,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 18:13:55,254 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 18:13:55,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:55,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1215333665, now seen corresponding path program 3 times [2024-06-21 18:13:55,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:55,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002584592] [2024-06-21 18:13:55,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:55,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:55,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:55,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002584592] [2024-06-21 18:13:55,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002584592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:55,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:55,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:55,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314554590] [2024-06-21 18:13:55,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:55,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:55,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:55,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:55,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:55,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:55,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 131 transitions, 1454 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:55,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:55,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:55,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:55,679 INFO L124 PetriNetUnfolderBase]: 1045/1946 cut-off events. [2024-06-21 18:13:55,679 INFO L125 PetriNetUnfolderBase]: For 12212/12218 co-relation queries the response was YES. [2024-06-21 18:13:55,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7640 conditions, 1946 events. 1045/1946 cut-off events. For 12212/12218 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11408 event pairs, 383 based on Foata normal form. 19/1956 useless extension candidates. Maximal degree in co-relation 7584. Up to 1071 conditions per place. [2024-06-21 18:13:55,688 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 111 selfloop transitions, 32 changer transitions 19/170 dead transitions. [2024-06-21 18:13:55,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 170 transitions, 1933 flow [2024-06-21 18:13:55,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:55,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:55,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 18:13:55,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-21 18:13:55,690 INFO L175 Difference]: Start difference. First operand has 177 places, 131 transitions, 1454 flow. Second operand 9 states and 208 transitions. [2024-06-21 18:13:55,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 170 transitions, 1933 flow [2024-06-21 18:13:55,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 170 transitions, 1862 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:55,710 INFO L231 Difference]: Finished difference. Result has 178 places, 127 transitions, 1404 flow [2024-06-21 18:13:55,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1404, PETRI_PLACES=178, PETRI_TRANSITIONS=127} [2024-06-21 18:13:55,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-21 18:13:55,710 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 127 transitions, 1404 flow [2024-06-21 18:13:55,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:55,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:55,711 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, 1, 1] [2024-06-21 18:13:55,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 18:13:55,711 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 18:13:55,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:55,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1275330127, now seen corresponding path program 4 times [2024-06-21 18:13:55,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:55,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884133382] [2024-06-21 18:13:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:55,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:55,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:55,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884133382] [2024-06-21 18:13:55,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884133382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:55,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:55,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:55,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149136901] [2024-06-21 18:13:55,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:55,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:55,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:55,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:55,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:55,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:55,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 127 transitions, 1404 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:55,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:55,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:55,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:56,171 INFO L124 PetriNetUnfolderBase]: 1110/2061 cut-off events. [2024-06-21 18:13:56,172 INFO L125 PetriNetUnfolderBase]: For 13571/13577 co-relation queries the response was YES. [2024-06-21 18:13:56,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8108 conditions, 2061 events. 1110/2061 cut-off events. For 13571/13577 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12303 event pairs, 395 based on Foata normal form. 19/2071 useless extension candidates. Maximal degree in co-relation 8052. Up to 1380 conditions per place. [2024-06-21 18:13:56,185 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 112 selfloop transitions, 34 changer transitions 8/162 dead transitions. [2024-06-21 18:13:56,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 162 transitions, 1857 flow [2024-06-21 18:13:56,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:56,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 18:13:56,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-21 18:13:56,187 INFO L175 Difference]: Start difference. First operand has 178 places, 127 transitions, 1404 flow. Second operand 9 states and 203 transitions. [2024-06-21 18:13:56,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 162 transitions, 1857 flow [2024-06-21 18:13:56,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 162 transitions, 1773 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:56,209 INFO L231 Difference]: Finished difference. Result has 172 places, 126 transitions, 1383 flow [2024-06-21 18:13:56,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1383, PETRI_PLACES=172, PETRI_TRANSITIONS=126} [2024-06-21 18:13:56,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-21 18:13:56,210 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 126 transitions, 1383 flow [2024-06-21 18:13:56,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:56,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:56,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:56,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 18:13:56,211 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 18:13:56,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:56,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1274944177, now seen corresponding path program 5 times [2024-06-21 18:13:56,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:56,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18328770] [2024-06-21 18:13:56,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:56,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:56,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:56,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18328770] [2024-06-21 18:13:56,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18328770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:56,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:56,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:56,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119937826] [2024-06-21 18:13:56,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:56,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:56,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:56,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:56,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:56,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:56,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 126 transitions, 1383 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:56,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:56,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:56,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:56,636 INFO L124 PetriNetUnfolderBase]: 1005/1876 cut-off events. [2024-06-21 18:13:56,637 INFO L125 PetriNetUnfolderBase]: For 11481/11487 co-relation queries the response was YES. [2024-06-21 18:13:56,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7326 conditions, 1876 events. 1005/1876 cut-off events. For 11481/11487 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10962 event pairs, 377 based on Foata normal form. 19/1886 useless extension candidates. Maximal degree in co-relation 7272. Up to 1380 conditions per place. [2024-06-21 18:13:56,647 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 96 selfloop transitions, 29 changer transitions 22/155 dead transitions. [2024-06-21 18:13:56,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 155 transitions, 1766 flow [2024-06-21 18:13:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:56,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-21 18:13:56,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-21 18:13:56,649 INFO L175 Difference]: Start difference. First operand has 172 places, 126 transitions, 1383 flow. Second operand 9 states and 197 transitions. [2024-06-21 18:13:56,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 155 transitions, 1766 flow [2024-06-21 18:13:56,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 155 transitions, 1697 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:56,667 INFO L231 Difference]: Finished difference. Result has 172 places, 120 transitions, 1296 flow [2024-06-21 18:13:56,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1296, PETRI_PLACES=172, PETRI_TRANSITIONS=120} [2024-06-21 18:13:56,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-21 18:13:56,667 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 120 transitions, 1296 flow [2024-06-21 18:13:56,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:56,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:56,668 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, 1, 1, 1] [2024-06-21 18:13:56,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 18:13:56,668 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 18:13:56,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:56,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1294077267, now seen corresponding path program 6 times [2024-06-21 18:13:56,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:56,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599995316] [2024-06-21 18:13:56,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:56,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:56,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:56,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599995316] [2024-06-21 18:13:56,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599995316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:56,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:56,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:56,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480268541] [2024-06-21 18:13:56,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:56,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:56,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:56,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:56,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:56,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:56,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 120 transitions, 1296 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:56,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:56,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:56,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:57,098 INFO L124 PetriNetUnfolderBase]: 1070/1989 cut-off events. [2024-06-21 18:13:57,099 INFO L125 PetriNetUnfolderBase]: For 12974/12980 co-relation queries the response was YES. [2024-06-21 18:13:57,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7724 conditions, 1989 events. 1070/1989 cut-off events. For 12974/12980 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11806 event pairs, 383 based on Foata normal form. 19/1999 useless extension candidates. Maximal degree in co-relation 7671. Up to 1286 conditions per place. [2024-06-21 18:13:57,110 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 104 selfloop transitions, 31 changer transitions 10/153 dead transitions. [2024-06-21 18:13:57,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 153 transitions, 1730 flow [2024-06-21 18:13:57,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:57,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-21 18:13:57,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-21 18:13:57,112 INFO L175 Difference]: Start difference. First operand has 172 places, 120 transitions, 1296 flow. Second operand 9 states and 201 transitions. [2024-06-21 18:13:57,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 153 transitions, 1730 flow [2024-06-21 18:13:57,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 153 transitions, 1658 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:57,131 INFO L231 Difference]: Finished difference. Result has 166 places, 117 transitions, 1254 flow [2024-06-21 18:13:57,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1254, PETRI_PLACES=166, PETRI_TRANSITIONS=117} [2024-06-21 18:13:57,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-21 18:13:57,132 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 117 transitions, 1254 flow [2024-06-21 18:13:57,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:57,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:57,132 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, 1, 1] [2024-06-21 18:13:57,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 18:13:57,132 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 18:13:57,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:57,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1646803633, now seen corresponding path program 7 times [2024-06-21 18:13:57,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:57,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289477196] [2024-06-21 18:13:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:57,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:57,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:57,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289477196] [2024-06-21 18:13:57,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289477196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:57,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:57,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:13:57,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98165152] [2024-06-21 18:13:57,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:57,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:13:57,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:57,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:13:57,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:13:57,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:57,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 117 transitions, 1254 flow. Second operand has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:57,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:57,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:57,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:57,577 INFO L124 PetriNetUnfolderBase]: 1046/1959 cut-off events. [2024-06-21 18:13:57,578 INFO L125 PetriNetUnfolderBase]: For 12630/12636 co-relation queries the response was YES. [2024-06-21 18:13:57,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7557 conditions, 1959 events. 1046/1959 cut-off events. For 12630/12636 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11597 event pairs, 446 based on Foata normal form. 19/1969 useless extension candidates. Maximal degree in co-relation 7505. Up to 1473 conditions per place. [2024-06-21 18:13:57,590 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 94 selfloop transitions, 25 changer transitions 22/149 dead transitions. [2024-06-21 18:13:57,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 149 transitions, 1648 flow [2024-06-21 18:13:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:57,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:57,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-21 18:13:57,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-21 18:13:57,591 INFO L175 Difference]: Start difference. First operand has 166 places, 117 transitions, 1254 flow. Second operand 10 states and 214 transitions. [2024-06-21 18:13:57,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 149 transitions, 1648 flow [2024-06-21 18:13:57,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 149 transitions, 1587 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:57,610 INFO L231 Difference]: Finished difference. Result has 169 places, 115 transitions, 1231 flow [2024-06-21 18:13:57,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1231, PETRI_PLACES=169, PETRI_TRANSITIONS=115} [2024-06-21 18:13:57,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-21 18:13:57,611 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 115 transitions, 1231 flow [2024-06-21 18:13:57,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:57,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:57,611 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, 1, 1] [2024-06-21 18:13:57,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 18:13:57,611 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 18:13:57,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:57,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1336186191, now seen corresponding path program 8 times [2024-06-21 18:13:57,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:57,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845121971] [2024-06-21 18:13:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:57,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:57,736 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 18:13:57,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:57,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845121971] [2024-06-21 18:13:57,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845121971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:57,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:57,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:57,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674569259] [2024-06-21 18:13:57,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:57,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:57,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:57,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:57,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:57,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:57,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 115 transitions, 1231 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:57,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:57,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:57,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:58,032 INFO L124 PetriNetUnfolderBase]: 937/1758 cut-off events. [2024-06-21 18:13:58,032 INFO L125 PetriNetUnfolderBase]: For 10996/11002 co-relation queries the response was YES. [2024-06-21 18:13:58,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6751 conditions, 1758 events. 937/1758 cut-off events. For 10996/11002 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10168 event pairs, 365 based on Foata normal form. 19/1768 useless extension candidates. Maximal degree in co-relation 6697. Up to 1286 conditions per place. [2024-06-21 18:13:58,043 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 86 selfloop transitions, 19 changer transitions 28/141 dead transitions. [2024-06-21 18:13:58,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 141 transitions, 1581 flow [2024-06-21 18:13:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-21 18:13:58,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-21 18:13:58,044 INFO L175 Difference]: Start difference. First operand has 169 places, 115 transitions, 1231 flow. Second operand 9 states and 195 transitions. [2024-06-21 18:13:58,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 141 transitions, 1581 flow [2024-06-21 18:13:58,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 141 transitions, 1530 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:58,061 INFO L231 Difference]: Finished difference. Result has 167 places, 104 transitions, 1054 flow [2024-06-21 18:13:58,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1054, PETRI_PLACES=167, PETRI_TRANSITIONS=104} [2024-06-21 18:13:58,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-21 18:13:58,062 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 104 transitions, 1054 flow [2024-06-21 18:13:58,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:58,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:58,062 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, 1, 1] [2024-06-21 18:13:58,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 18:13:58,063 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 18:13:58,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:58,063 INFO L85 PathProgramCache]: Analyzing trace with hash 2015462863, now seen corresponding path program 9 times [2024-06-21 18:13:58,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:58,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253777645] [2024-06-21 18:13:58,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:58,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:58,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:58,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253777645] [2024-06-21 18:13:58,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253777645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:58,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:58,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:58,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966138467] [2024-06-21 18:13:58,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:58,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:58,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:58,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:58,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:58,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 104 transitions, 1054 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:58,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:58,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:58,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:58,440 INFO L124 PetriNetUnfolderBase]: 986/1821 cut-off events. [2024-06-21 18:13:58,440 INFO L125 PetriNetUnfolderBase]: For 11727/11733 co-relation queries the response was YES. [2024-06-21 18:13:58,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6915 conditions, 1821 events. 986/1821 cut-off events. For 11727/11733 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10687 event pairs, 381 based on Foata normal form. 22/1835 useless extension candidates. Maximal degree in co-relation 6863. Up to 923 conditions per place. [2024-06-21 18:13:58,451 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 89 selfloop transitions, 32 changer transitions 16/145 dead transitions. [2024-06-21 18:13:58,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 145 transitions, 1494 flow [2024-06-21 18:13:58,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:58,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:58,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-21 18:13:58,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-21 18:13:58,453 INFO L175 Difference]: Start difference. First operand has 167 places, 104 transitions, 1054 flow. Second operand 9 states and 209 transitions. [2024-06-21 18:13:58,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 145 transitions, 1494 flow [2024-06-21 18:13:58,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 145 transitions, 1386 flow, removed 10 selfloop flow, removed 15 redundant places. [2024-06-21 18:13:58,469 INFO L231 Difference]: Finished difference. Result has 151 places, 102 transitions, 1004 flow [2024-06-21 18:13:58,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1004, PETRI_PLACES=151, PETRI_TRANSITIONS=102} [2024-06-21 18:13:58,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-21 18:13:58,470 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 102 transitions, 1004 flow [2024-06-21 18:13:58,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:58,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:58,470 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, 1, 1] [2024-06-21 18:13:58,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 18:13:58,471 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 18:13:58,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:58,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1488859825, now seen corresponding path program 10 times [2024-06-21 18:13:58,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:58,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038773746] [2024-06-21 18:13:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:58,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:58,580 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 18:13:58,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:58,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038773746] [2024-06-21 18:13:58,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038773746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:58,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:58,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:58,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854205957] [2024-06-21 18:13:58,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:58,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:58,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:58,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:58,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:58,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:58,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 102 transitions, 1004 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:58,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:58,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:58,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:58,859 INFO L124 PetriNetUnfolderBase]: 1016/1877 cut-off events. [2024-06-21 18:13:58,859 INFO L125 PetriNetUnfolderBase]: For 13273/13279 co-relation queries the response was YES. [2024-06-21 18:13:58,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7288 conditions, 1877 events. 1016/1877 cut-off events. For 13273/13279 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11167 event pairs, 418 based on Foata normal form. 22/1891 useless extension candidates. Maximal degree in co-relation 7240. Up to 923 conditions per place. [2024-06-21 18:13:58,870 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 103 selfloop transitions, 24 changer transitions 8/143 dead transitions. [2024-06-21 18:13:58,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 143 transitions, 1470 flow [2024-06-21 18:13:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-21 18:13:58,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-21 18:13:58,871 INFO L175 Difference]: Start difference. First operand has 151 places, 102 transitions, 1004 flow. Second operand 9 states and 209 transitions. [2024-06-21 18:13:58,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 143 transitions, 1470 flow [2024-06-21 18:13:58,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 143 transitions, 1404 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:58,886 INFO L231 Difference]: Finished difference. Result has 151 places, 101 transitions, 990 flow [2024-06-21 18:13:58,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=990, PETRI_PLACES=151, PETRI_TRANSITIONS=101} [2024-06-21 18:13:58,887 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-21 18:13:58,887 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 101 transitions, 990 flow [2024-06-21 18:13:58,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:58,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:58,887 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, 1, 1] [2024-06-21 18:13:58,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 18:13:58,887 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 18:13:58,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:58,888 INFO L85 PathProgramCache]: Analyzing trace with hash 614441555, now seen corresponding path program 11 times [2024-06-21 18:13:58,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:58,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619793463] [2024-06-21 18:13:58,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:58,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:58,996 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 18:13:58,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:58,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619793463] [2024-06-21 18:13:58,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619793463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:58,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:58,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:58,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50335133] [2024-06-21 18:13:58,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:58,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:58,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:58,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:58,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:59,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:59,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 101 transitions, 990 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:59,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:59,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:59,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:59,243 INFO L124 PetriNetUnfolderBase]: 911/1690 cut-off events. [2024-06-21 18:13:59,243 INFO L125 PetriNetUnfolderBase]: For 11281/11287 co-relation queries the response was YES. [2024-06-21 18:13:59,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6540 conditions, 1690 events. 911/1690 cut-off events. For 11281/11287 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9832 event pairs, 406 based on Foata normal form. 22/1704 useless extension candidates. Maximal degree in co-relation 6492. Up to 923 conditions per place. [2024-06-21 18:13:59,253 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 88 selfloop transitions, 21 changer transitions 19/136 dead transitions. [2024-06-21 18:13:59,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 136 transitions, 1386 flow [2024-06-21 18:13:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 18:13:59,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-21 18:13:59,255 INFO L175 Difference]: Start difference. First operand has 151 places, 101 transitions, 990 flow. Second operand 9 states and 203 transitions. [2024-06-21 18:13:59,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 136 transitions, 1386 flow [2024-06-21 18:13:59,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 136 transitions, 1330 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:59,269 INFO L231 Difference]: Finished difference. Result has 151 places, 97 transitions, 937 flow [2024-06-21 18:13:59,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=937, PETRI_PLACES=151, PETRI_TRANSITIONS=97} [2024-06-21 18:13:59,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-21 18:13:59,269 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 97 transitions, 937 flow [2024-06-21 18:13:59,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:59,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:59,270 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, 1, 1] [2024-06-21 18:13:59,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 18:13:59,270 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 18:13:59,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:59,270 INFO L85 PathProgramCache]: Analyzing trace with hash -543150159, now seen corresponding path program 12 times [2024-06-21 18:13:59,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:59,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704409092] [2024-06-21 18:13:59,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:59,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:59,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:59,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704409092] [2024-06-21 18:13:59,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704409092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:59,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:59,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:59,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795193295] [2024-06-21 18:13:59,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:59,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:59,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:59,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:59,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:59,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:59,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 97 transitions, 937 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:59,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:59,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:59,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:59,625 INFO L124 PetriNetUnfolderBase]: 976/1805 cut-off events. [2024-06-21 18:13:59,625 INFO L125 PetriNetUnfolderBase]: For 12701/12707 co-relation queries the response was YES. [2024-06-21 18:13:59,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6966 conditions, 1805 events. 976/1805 cut-off events. For 12701/12707 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10690 event pairs, 418 based on Foata normal form. 22/1819 useless extension candidates. Maximal degree in co-relation 6919. Up to 1228 conditions per place. [2024-06-21 18:13:59,659 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 89 selfloop transitions, 23 changer transitions 8/128 dead transitions. [2024-06-21 18:13:59,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 128 transitions, 1305 flow [2024-06-21 18:13:59,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:59,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:59,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-21 18:13:59,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-21 18:13:59,660 INFO L175 Difference]: Start difference. First operand has 151 places, 97 transitions, 937 flow. Second operand 9 states and 198 transitions. [2024-06-21 18:13:59,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 128 transitions, 1305 flow [2024-06-21 18:13:59,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 128 transitions, 1247 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:59,675 INFO L231 Difference]: Finished difference. Result has 146 places, 96 transitions, 921 flow [2024-06-21 18:13:59,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=921, PETRI_PLACES=146, PETRI_TRANSITIONS=96} [2024-06-21 18:13:59,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-21 18:13:59,676 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 96 transitions, 921 flow [2024-06-21 18:13:59,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:59,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:59,676 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, 1, 1] [2024-06-21 18:13:59,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 18:13:59,676 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 18:13:59,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:59,677 INFO L85 PathProgramCache]: Analyzing trace with hash -542764209, now seen corresponding path program 13 times [2024-06-21 18:13:59,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:59,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207455274] [2024-06-21 18:13:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:59,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:59,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:59,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207455274] [2024-06-21 18:13:59,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207455274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:59,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:59,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:59,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764317060] [2024-06-21 18:13:59,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:59,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:59,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:59,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:59,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:59,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:13:59,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 96 transitions, 921 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:59,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:59,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:13:59,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:00,022 INFO L124 PetriNetUnfolderBase]: 871/1620 cut-off events. [2024-06-21 18:14:00,022 INFO L125 PetriNetUnfolderBase]: For 10815/10821 co-relation queries the response was YES. [2024-06-21 18:14:00,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6241 conditions, 1620 events. 871/1620 cut-off events. For 10815/10821 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9378 event pairs, 400 based on Foata normal form. 22/1634 useless extension candidates. Maximal degree in co-relation 6195. Up to 1228 conditions per place. [2024-06-21 18:14:00,031 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 73 selfloop transitions, 19 changer transitions 21/121 dead transitions. [2024-06-21 18:14:00,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 121 transitions, 1221 flow [2024-06-21 18:14:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:00,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-21 18:14:00,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-21 18:14:00,032 INFO L175 Difference]: Start difference. First operand has 146 places, 96 transitions, 921 flow. Second operand 9 states and 192 transitions. [2024-06-21 18:14:00,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 121 transitions, 1221 flow [2024-06-21 18:14:00,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 121 transitions, 1171 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:00,046 INFO L231 Difference]: Finished difference. Result has 146 places, 91 transitions, 855 flow [2024-06-21 18:14:00,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=855, PETRI_PLACES=146, PETRI_TRANSITIONS=91} [2024-06-21 18:14:00,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-21 18:14:00,047 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 91 transitions, 855 flow [2024-06-21 18:14:00,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:00,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:00,047 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, 1, 1] [2024-06-21 18:14:00,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 18:14:00,048 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 18:14:00,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1191134901, now seen corresponding path program 14 times [2024-06-21 18:14:00,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:00,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105631711] [2024-06-21 18:14:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:00,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:00,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:00,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105631711] [2024-06-21 18:14:00,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105631711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:00,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:00,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:00,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273343045] [2024-06-21 18:14:00,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:00,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:00,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:00,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:00,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:00,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:00,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 91 transitions, 855 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:00,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:00,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:00,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:00,408 INFO L124 PetriNetUnfolderBase]: 860/1611 cut-off events. [2024-06-21 18:14:00,408 INFO L125 PetriNetUnfolderBase]: For 10567/10573 co-relation queries the response was YES. [2024-06-21 18:14:00,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6075 conditions, 1611 events. 860/1611 cut-off events. For 10567/10573 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9332 event pairs, 265 based on Foata normal form. 22/1630 useless extension candidates. Maximal degree in co-relation 6030. Up to 632 conditions per place. [2024-06-21 18:14:00,417 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 69 selfloop transitions, 34 changer transitions 16/127 dead transitions. [2024-06-21 18:14:00,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 127 transitions, 1239 flow [2024-06-21 18:14:00,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:00,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:00,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 18:14:00,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-21 18:14:00,419 INFO L175 Difference]: Start difference. First operand has 146 places, 91 transitions, 855 flow. Second operand 9 states and 203 transitions. [2024-06-21 18:14:00,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 127 transitions, 1239 flow [2024-06-21 18:14:00,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 127 transitions, 1191 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:00,431 INFO L231 Difference]: Finished difference. Result has 140 places, 89 transitions, 865 flow [2024-06-21 18:14:00,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=865, PETRI_PLACES=140, PETRI_TRANSITIONS=89} [2024-06-21 18:14:00,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-21 18:14:00,432 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 89 transitions, 865 flow [2024-06-21 18:14:00,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:00,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:00,432 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, 1, 1] [2024-06-21 18:14:00,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 18:14:00,433 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 18:14:00,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:00,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1466520403, now seen corresponding path program 15 times [2024-06-21 18:14:00,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:00,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698300278] [2024-06-21 18:14:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:00,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:00,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:00,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698300278] [2024-06-21 18:14:00,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698300278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:00,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:00,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:00,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200169522] [2024-06-21 18:14:00,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:00,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:00,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:00,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:00,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:00,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:00,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 89 transitions, 865 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:00,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:00,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:00,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:00,797 INFO L124 PetriNetUnfolderBase]: 890/1671 cut-off events. [2024-06-21 18:14:00,798 INFO L125 PetriNetUnfolderBase]: For 12829/12835 co-relation queries the response was YES. [2024-06-21 18:14:00,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6602 conditions, 1671 events. 890/1671 cut-off events. For 12829/12835 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9831 event pairs, 241 based on Foata normal form. 22/1686 useless extension candidates. Maximal degree in co-relation 6558. Up to 632 conditions per place. [2024-06-21 18:14:00,807 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 84 selfloop transitions, 25 changer transitions 8/125 dead transitions. [2024-06-21 18:14:00,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 125 transitions, 1277 flow [2024-06-21 18:14:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 18:14:00,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-21 18:14:00,808 INFO L175 Difference]: Start difference. First operand has 140 places, 89 transitions, 865 flow. Second operand 9 states and 203 transitions. [2024-06-21 18:14:00,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 125 transitions, 1277 flow [2024-06-21 18:14:00,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 125 transitions, 1210 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:00,822 INFO L231 Difference]: Finished difference. Result has 140 places, 88 transitions, 850 flow [2024-06-21 18:14:00,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=850, PETRI_PLACES=140, PETRI_TRANSITIONS=88} [2024-06-21 18:14:00,823 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-21 18:14:00,823 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 88 transitions, 850 flow [2024-06-21 18:14:00,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:00,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:00,823 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, 1, 1] [2024-06-21 18:14:00,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 18:14:00,824 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 18:14:00,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:00,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1516261971, now seen corresponding path program 16 times [2024-06-21 18:14:00,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:00,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29017662] [2024-06-21 18:14:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:00,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:00,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:00,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29017662] [2024-06-21 18:14:00,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29017662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:00,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:00,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:00,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199074373] [2024-06-21 18:14:00,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:00,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:00,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:00,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:00,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:01,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:01,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 88 transitions, 850 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:01,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:01,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:01,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:01,167 INFO L124 PetriNetUnfolderBase]: 785/1484 cut-off events. [2024-06-21 18:14:01,168 INFO L125 PetriNetUnfolderBase]: For 10665/10671 co-relation queries the response was YES. [2024-06-21 18:14:01,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5854 conditions, 1484 events. 785/1484 cut-off events. For 10665/10671 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8495 event pairs, 229 based on Foata normal form. 22/1499 useless extension candidates. Maximal degree in co-relation 5810. Up to 632 conditions per place. [2024-06-21 18:14:01,176 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 69 selfloop transitions, 22 changer transitions 19/118 dead transitions. [2024-06-21 18:14:01,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 118 transitions, 1192 flow [2024-06-21 18:14:01,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:01,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:01,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-21 18:14:01,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-21 18:14:01,177 INFO L175 Difference]: Start difference. First operand has 140 places, 88 transitions, 850 flow. Second operand 9 states and 197 transitions. [2024-06-21 18:14:01,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 118 transitions, 1192 flow [2024-06-21 18:14:01,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 118 transitions, 1136 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:01,190 INFO L231 Difference]: Finished difference. Result has 140 places, 84 transitions, 804 flow [2024-06-21 18:14:01,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=804, PETRI_PLACES=140, PETRI_TRANSITIONS=84} [2024-06-21 18:14:01,190 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-21 18:14:01,190 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 84 transitions, 804 flow [2024-06-21 18:14:01,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:01,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:01,190 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, 1, 1] [2024-06-21 18:14:01,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 18:14:01,191 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 18:14:01,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:01,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1394517745, now seen corresponding path program 17 times [2024-06-21 18:14:01,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:01,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628352878] [2024-06-21 18:14:01,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:01,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:01,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:01,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628352878] [2024-06-21 18:14:01,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628352878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:01,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:01,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:01,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847226710] [2024-06-21 18:14:01,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:01,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:01,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:01,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:01,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:01,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:01,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 84 transitions, 804 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:01,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:01,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:01,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:01,576 INFO L124 PetriNetUnfolderBase]: 744/1399 cut-off events. [2024-06-21 18:14:01,576 INFO L125 PetriNetUnfolderBase]: For 10405/10411 co-relation queries the response was YES. [2024-06-21 18:14:01,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5537 conditions, 1399 events. 744/1399 cut-off events. For 10405/10411 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7898 event pairs, 253 based on Foata normal form. 22/1418 useless extension candidates. Maximal degree in co-relation 5494. Up to 949 conditions per place. [2024-06-21 18:14:01,583 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 68 selfloop transitions, 19 changer transitions 17/112 dead transitions. [2024-06-21 18:14:01,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 112 transitions, 1102 flow [2024-06-21 18:14:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:01,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-21 18:14:01,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-21 18:14:01,584 INFO L175 Difference]: Start difference. First operand has 140 places, 84 transitions, 804 flow. Second operand 9 states and 198 transitions. [2024-06-21 18:14:01,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 112 transitions, 1102 flow [2024-06-21 18:14:01,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 112 transitions, 1043 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:01,597 INFO L231 Difference]: Finished difference. Result has 134 places, 81 transitions, 755 flow [2024-06-21 18:14:01,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=755, PETRI_PLACES=134, PETRI_TRANSITIONS=81} [2024-06-21 18:14:01,597 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-21 18:14:01,597 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 81 transitions, 755 flow [2024-06-21 18:14:01,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:01,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:01,598 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, 1, 1] [2024-06-21 18:14:01,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 18:14:01,598 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 18:14:01,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:01,598 INFO L85 PathProgramCache]: Analyzing trace with hash 966421075, now seen corresponding path program 18 times [2024-06-21 18:14:01,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:01,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540235694] [2024-06-21 18:14:01,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:01,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:01,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:01,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540235694] [2024-06-21 18:14:01,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540235694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:01,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:01,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:01,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485498928] [2024-06-21 18:14:01,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:01,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:01,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:01,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:01,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:01,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:01,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 81 transitions, 755 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:01,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:01,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:01,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:01,939 INFO L124 PetriNetUnfolderBase]: 801/1482 cut-off events. [2024-06-21 18:14:01,939 INFO L125 PetriNetUnfolderBase]: For 11357/11371 co-relation queries the response was YES. [2024-06-21 18:14:01,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5919 conditions, 1482 events. 801/1482 cut-off events. For 11357/11371 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8408 event pairs, 374 based on Foata normal form. 22/1493 useless extension candidates. Maximal degree in co-relation 5878. Up to 951 conditions per place. [2024-06-21 18:14:01,947 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 74 selfloop transitions, 19 changer transitions 8/109 dead transitions. [2024-06-21 18:14:01,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 109 transitions, 1077 flow [2024-06-21 18:14:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-21 18:14:01,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-21 18:14:01,948 INFO L175 Difference]: Start difference. First operand has 134 places, 81 transitions, 755 flow. Second operand 9 states and 193 transitions. [2024-06-21 18:14:01,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 109 transitions, 1077 flow [2024-06-21 18:14:01,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 109 transitions, 1035 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:01,960 INFO L231 Difference]: Finished difference. Result has 133 places, 80 transitions, 748 flow [2024-06-21 18:14:01,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=748, PETRI_PLACES=133, PETRI_TRANSITIONS=80} [2024-06-21 18:14:01,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-21 18:14:01,960 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 80 transitions, 748 flow [2024-06-21 18:14:01,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:01,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:01,961 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, 1, 1, 1] [2024-06-21 18:14:01,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 18:14:01,961 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 18:14:01,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:01,961 INFO L85 PathProgramCache]: Analyzing trace with hash 966035125, now seen corresponding path program 19 times [2024-06-21 18:14:01,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:01,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4536966] [2024-06-21 18:14:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:01,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:02,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:02,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4536966] [2024-06-21 18:14:02,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4536966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:02,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:02,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:02,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37972336] [2024-06-21 18:14:02,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:02,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:02,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:02,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:02,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:02,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:02,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 80 transitions, 748 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:02,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:02,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:02,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:02,247 INFO L124 PetriNetUnfolderBase]: 696/1303 cut-off events. [2024-06-21 18:14:02,247 INFO L125 PetriNetUnfolderBase]: For 9511/9517 co-relation queries the response was YES. [2024-06-21 18:14:02,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5172 conditions, 1303 events. 696/1303 cut-off events. For 9511/9517 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7212 event pairs, 334 based on Foata normal form. 22/1314 useless extension candidates. Maximal degree in co-relation 5130. Up to 951 conditions per place. [2024-06-21 18:14:02,254 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 57 selfloop transitions, 15 changer transitions 22/102 dead transitions. [2024-06-21 18:14:02,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 102 transitions, 1002 flow [2024-06-21 18:14:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:02,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-21 18:14:02,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-21 18:14:02,255 INFO L175 Difference]: Start difference. First operand has 133 places, 80 transitions, 748 flow. Second operand 9 states and 187 transitions. [2024-06-21 18:14:02,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 102 transitions, 1002 flow [2024-06-21 18:14:02,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 102 transitions, 965 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:02,266 INFO L231 Difference]: Finished difference. Result has 134 places, 75 transitions, 687 flow [2024-06-21 18:14:02,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=687, PETRI_PLACES=134, PETRI_TRANSITIONS=75} [2024-06-21 18:14:02,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-21 18:14:02,266 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 75 transitions, 687 flow [2024-06-21 18:14:02,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:02,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:02,267 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, 1, 1] [2024-06-21 18:14:02,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 18:14:02,267 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 18:14:02,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:02,267 INFO L85 PathProgramCache]: Analyzing trace with hash 376573681, now seen corresponding path program 20 times [2024-06-21 18:14:02,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:02,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331700853] [2024-06-21 18:14:02,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:02,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:02,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:02,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331700853] [2024-06-21 18:14:02,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331700853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:02,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:02,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:02,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599474311] [2024-06-21 18:14:02,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:02,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:02,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:02,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:02,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:02,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:02,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 75 transitions, 687 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:02,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:02,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:02,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:02,609 INFO L124 PetriNetUnfolderBase]: 656/1225 cut-off events. [2024-06-21 18:14:02,609 INFO L125 PetriNetUnfolderBase]: For 9231/9237 co-relation queries the response was YES. [2024-06-21 18:14:02,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4858 conditions, 1225 events. 656/1225 cut-off events. For 9231/9237 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6703 event pairs, 269 based on Foata normal form. 22/1234 useless extension candidates. Maximal degree in co-relation 4816. Up to 889 conditions per place. [2024-06-21 18:14:02,614 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 58 selfloop transitions, 14 changer transitions 17/97 dead transitions. [2024-06-21 18:14:02,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 97 transitions, 935 flow [2024-06-21 18:14:02,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-21 18:14:02,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-21 18:14:02,615 INFO L175 Difference]: Start difference. First operand has 134 places, 75 transitions, 687 flow. Second operand 9 states and 192 transitions. [2024-06-21 18:14:02,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 97 transitions, 935 flow [2024-06-21 18:14:02,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 97 transitions, 861 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 18:14:02,624 INFO L231 Difference]: Finished difference. Result has 123 places, 72 transitions, 609 flow [2024-06-21 18:14:02,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=609, PETRI_PLACES=123, PETRI_TRANSITIONS=72} [2024-06-21 18:14:02,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-21 18:14:02,624 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 72 transitions, 609 flow [2024-06-21 18:14:02,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:02,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:02,625 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, 1, 1] [2024-06-21 18:14:02,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 18:14:02,625 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 18:14:02,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:02,625 INFO L85 PathProgramCache]: Analyzing trace with hash 726778737, now seen corresponding path program 21 times [2024-06-21 18:14:02,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:02,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173938689] [2024-06-21 18:14:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:02,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:02,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:02,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173938689] [2024-06-21 18:14:02,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173938689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:02,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:02,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:02,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882092] [2024-06-21 18:14:02,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:02,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:02,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:02,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:02,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:02,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:02,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 72 transitions, 609 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:02,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:02,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:02,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:02,933 INFO L124 PetriNetUnfolderBase]: 814/1503 cut-off events. [2024-06-21 18:14:02,933 INFO L125 PetriNetUnfolderBase]: For 11509/11515 co-relation queries the response was YES. [2024-06-21 18:14:02,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5928 conditions, 1503 events. 814/1503 cut-off events. For 11509/11515 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8732 event pairs, 399 based on Foata normal form. 22/1516 useless extension candidates. Maximal degree in co-relation 5890. Up to 766 conditions per place. [2024-06-21 18:14:02,939 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 70 selfloop transitions, 18 changer transitions 8/104 dead transitions. [2024-06-21 18:14:02,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 104 transitions, 967 flow [2024-06-21 18:14:02,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:02,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-21 18:14:02,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-21 18:14:02,940 INFO L175 Difference]: Start difference. First operand has 123 places, 72 transitions, 609 flow. Second operand 9 states and 199 transitions. [2024-06-21 18:14:02,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 104 transitions, 967 flow [2024-06-21 18:14:02,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 104 transitions, 929 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:02,949 INFO L231 Difference]: Finished difference. Result has 120 places, 71 transitions, 604 flow [2024-06-21 18:14:02,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=604, PETRI_PLACES=120, PETRI_TRANSITIONS=71} [2024-06-21 18:14:02,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-21 18:14:02,950 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 71 transitions, 604 flow [2024-06-21 18:14:02,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:02,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:02,950 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, 1, 1] [2024-06-21 18:14:02,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 18:14:02,951 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 18:14:02,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:02,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1692635633, now seen corresponding path program 22 times [2024-06-21 18:14:02,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:02,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761007162] [2024-06-21 18:14:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:02,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:03,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:03,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761007162] [2024-06-21 18:14:03,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761007162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:03,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:03,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:03,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942435717] [2024-06-21 18:14:03,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:03,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:03,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:03,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:03,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:03,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:03,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 71 transitions, 604 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:03,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:03,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:03,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:03,269 INFO L124 PetriNetUnfolderBase]: 790/1461 cut-off events. [2024-06-21 18:14:03,269 INFO L125 PetriNetUnfolderBase]: For 11443/11449 co-relation queries the response was YES. [2024-06-21 18:14:03,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5789 conditions, 1461 events. 790/1461 cut-off events. For 11443/11449 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8460 event pairs, 401 based on Foata normal form. 22/1472 useless extension candidates. Maximal degree in co-relation 5752. Up to 951 conditions per place. [2024-06-21 18:14:03,276 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 62 selfloop transitions, 18 changer transitions 8/96 dead transitions. [2024-06-21 18:14:03,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 96 transitions, 891 flow [2024-06-21 18:14:03,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-21 18:14:03,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-21 18:14:03,277 INFO L175 Difference]: Start difference. First operand has 120 places, 71 transitions, 604 flow. Second operand 9 states and 191 transitions. [2024-06-21 18:14:03,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 96 transitions, 891 flow [2024-06-21 18:14:03,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 96 transitions, 852 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:03,286 INFO L231 Difference]: Finished difference. Result has 121 places, 70 transitions, 597 flow [2024-06-21 18:14:03,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=597, PETRI_PLACES=121, PETRI_TRANSITIONS=70} [2024-06-21 18:14:03,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-21 18:14:03,287 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 70 transitions, 597 flow [2024-06-21 18:14:03,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:03,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:03,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:03,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 18:14:03,287 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 18:14:03,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:03,288 INFO L85 PathProgramCache]: Analyzing trace with hash -51908939, now seen corresponding path program 23 times [2024-06-21 18:14:03,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:03,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849071981] [2024-06-21 18:14:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:03,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:03,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:03,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849071981] [2024-06-21 18:14:03,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849071981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:03,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:03,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:03,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474947840] [2024-06-21 18:14:03,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:03,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:03,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:03,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:03,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:03,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:03,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 70 transitions, 597 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:03,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:03,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:03,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:03,600 INFO L124 PetriNetUnfolderBase]: 685/1276 cut-off events. [2024-06-21 18:14:03,600 INFO L125 PetriNetUnfolderBase]: For 9749/9755 co-relation queries the response was YES. [2024-06-21 18:14:03,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5053 conditions, 1276 events. 685/1276 cut-off events. For 9749/9755 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7145 event pairs, 381 based on Foata normal form. 22/1289 useless extension candidates. Maximal degree in co-relation 5016. Up to 766 conditions per place. [2024-06-21 18:14:03,606 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 56 selfloop transitions, 15 changer transitions 16/95 dead transitions. [2024-06-21 18:14:03,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 95 transitions, 879 flow [2024-06-21 18:14:03,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-21 18:14:03,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-21 18:14:03,607 INFO L175 Difference]: Start difference. First operand has 121 places, 70 transitions, 597 flow. Second operand 9 states and 193 transitions. [2024-06-21 18:14:03,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 95 transitions, 879 flow [2024-06-21 18:14:03,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 95 transitions, 840 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:03,616 INFO L231 Difference]: Finished difference. Result has 122 places, 66 transitions, 547 flow [2024-06-21 18:14:03,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=547, PETRI_PLACES=122, PETRI_TRANSITIONS=66} [2024-06-21 18:14:03,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-21 18:14:03,616 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 66 transitions, 547 flow [2024-06-21 18:14:03,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:03,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:03,617 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, 1, 1] [2024-06-21 18:14:03,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 18:14:03,617 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 18:14:03,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:03,617 INFO L85 PathProgramCache]: Analyzing trace with hash -73976159, now seen corresponding path program 24 times [2024-06-21 18:14:03,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:03,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202375476] [2024-06-21 18:14:03,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:03,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:03,735 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 18:14:03,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:03,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202375476] [2024-06-21 18:14:03,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202375476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:03,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:03,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:03,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231384070] [2024-06-21 18:14:03,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:03,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:03,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:03,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:03,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:03,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:03,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 66 transitions, 547 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:03,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:03,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:03,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:03,917 INFO L124 PetriNetUnfolderBase]: 574/1075 cut-off events. [2024-06-21 18:14:03,917 INFO L125 PetriNetUnfolderBase]: For 7901/7915 co-relation queries the response was YES. [2024-06-21 18:14:03,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4193 conditions, 1075 events. 574/1075 cut-off events. For 7901/7915 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5755 event pairs, 300 based on Foata normal form. 22/1088 useless extension candidates. Maximal degree in co-relation 4156. Up to 766 conditions per place. [2024-06-21 18:14:03,922 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 12 changer transitions 23/85 dead transitions. [2024-06-21 18:14:03,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 85 transitions, 759 flow [2024-06-21 18:14:03,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:03,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 18:14:03,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986449864498645 [2024-06-21 18:14:03,923 INFO L175 Difference]: Start difference. First operand has 122 places, 66 transitions, 547 flow. Second operand 9 states and 184 transitions. [2024-06-21 18:14:03,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 85 transitions, 759 flow [2024-06-21 18:14:03,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 85 transitions, 718 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:03,930 INFO L231 Difference]: Finished difference. Result has 116 places, 60 transitions, 466 flow [2024-06-21 18:14:03,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=466, PETRI_PLACES=116, PETRI_TRANSITIONS=60} [2024-06-21 18:14:03,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-21 18:14:03,931 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 60 transitions, 466 flow [2024-06-21 18:14:03,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:03,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:03,931 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, 1, 1] [2024-06-21 18:14:03,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 18:14:03,931 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 18:14:03,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash -318199601, now seen corresponding path program 25 times [2024-06-21 18:14:03,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:03,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664783850] [2024-06-21 18:14:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:03,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:04,049 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 18:14:04,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:04,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664783850] [2024-06-21 18:14:04,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664783850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:04,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:04,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:04,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431796550] [2024-06-21 18:14:04,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:04,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:04,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:04,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:04,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:04,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:04,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 60 transitions, 466 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:04,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:04,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:04,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:04,248 INFO L124 PetriNetUnfolderBase]: 542/1007 cut-off events. [2024-06-21 18:14:04,249 INFO L125 PetriNetUnfolderBase]: For 7650/7650 co-relation queries the response was YES. [2024-06-21 18:14:04,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3881 conditions, 1007 events. 542/1007 cut-off events. For 7650/7650 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5303 event pairs, 231 based on Foata normal form. 18/1014 useless extension candidates. Maximal degree in co-relation 3847. Up to 507 conditions per place. [2024-06-21 18:14:04,254 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 48 selfloop transitions, 16 changer transitions 9/81 dead transitions. [2024-06-21 18:14:04,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 81 transitions, 715 flow [2024-06-21 18:14:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-21 18:14:04,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2024-06-21 18:14:04,255 INFO L175 Difference]: Start difference. First operand has 116 places, 60 transitions, 466 flow. Second operand 8 states and 169 transitions. [2024-06-21 18:14:04,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 81 transitions, 715 flow [2024-06-21 18:14:04,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 81 transitions, 661 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:04,261 INFO L231 Difference]: Finished difference. Result has 104 places, 58 transitions, 436 flow [2024-06-21 18:14:04,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=436, PETRI_PLACES=104, PETRI_TRANSITIONS=58} [2024-06-21 18:14:04,261 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-21 18:14:04,261 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 58 transitions, 436 flow [2024-06-21 18:14:04,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:04,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:04,262 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, 1, 1] [2024-06-21 18:14:04,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 18:14:04,262 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 18:14:04,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:04,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1516456045, now seen corresponding path program 26 times [2024-06-21 18:14:04,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:04,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658526673] [2024-06-21 18:14:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:04,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:04,379 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 18:14:04,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:04,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658526673] [2024-06-21 18:14:04,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658526673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:04,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:04,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:04,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416613621] [2024-06-21 18:14:04,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:04,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:04,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:04,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:04,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:04,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:04,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 58 transitions, 436 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:04,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:04,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:04,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:04,551 INFO L124 PetriNetUnfolderBase]: 433/818 cut-off events. [2024-06-21 18:14:04,552 INFO L125 PetriNetUnfolderBase]: For 5970/5970 co-relation queries the response was YES. [2024-06-21 18:14:04,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3098 conditions, 818 events. 433/818 cut-off events. For 5970/5970 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4098 event pairs, 207 based on Foata normal form. 18/825 useless extension candidates. Maximal degree in co-relation 3066. Up to 507 conditions per place. [2024-06-21 18:14:04,555 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 10 changer transitions 21/73 dead transitions. [2024-06-21 18:14:04,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 73 transitions, 614 flow [2024-06-21 18:14:04,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:04,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:04,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 18:14:04,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4969512195121951 [2024-06-21 18:14:04,556 INFO L175 Difference]: Start difference. First operand has 104 places, 58 transitions, 436 flow. Second operand 8 states and 163 transitions. [2024-06-21 18:14:04,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 73 transitions, 614 flow [2024-06-21 18:14:04,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 73 transitions, 578 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:04,560 INFO L231 Difference]: Finished difference. Result has 104 places, 50 transitions, 335 flow [2024-06-21 18:14:04,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=335, PETRI_PLACES=104, PETRI_TRANSITIONS=50} [2024-06-21 18:14:04,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-21 18:14:04,561 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 50 transitions, 335 flow [2024-06-21 18:14:04,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:04,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:04,561 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, 1, 1] [2024-06-21 18:14:04,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 18:14:04,562 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 18:14:04,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:04,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1049268745, now seen corresponding path program 27 times [2024-06-21 18:14:04,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:04,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099561014] [2024-06-21 18:14:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:04,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:04,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:04,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099561014] [2024-06-21 18:14:04,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099561014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:04,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:04,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:04,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669389951] [2024-06-21 18:14:04,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:04,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:04,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:04,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:04,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:04,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:04,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 50 transitions, 335 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:04,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:04,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:04,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:04,878 INFO L124 PetriNetUnfolderBase]: 379/722 cut-off events. [2024-06-21 18:14:04,878 INFO L125 PetriNetUnfolderBase]: For 5584/5584 co-relation queries the response was YES. [2024-06-21 18:14:04,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2667 conditions, 722 events. 379/722 cut-off events. For 5584/5584 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3508 event pairs, 142 based on Foata normal form. 18/735 useless extension candidates. Maximal degree in co-relation 2636. Up to 451 conditions per place. [2024-06-21 18:14:04,882 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 35 selfloop transitions, 8 changer transitions 17/68 dead transitions. [2024-06-21 18:14:04,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 68 transitions, 515 flow [2024-06-21 18:14:04,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:04,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 18:14:04,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-21 18:14:04,883 INFO L175 Difference]: Start difference. First operand has 104 places, 50 transitions, 335 flow. Second operand 8 states and 168 transitions. [2024-06-21 18:14:04,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 68 transitions, 515 flow [2024-06-21 18:14:04,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 68 transitions, 487 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:04,887 INFO L231 Difference]: Finished difference. Result has 93 places, 47 transitions, 306 flow [2024-06-21 18:14:04,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=306, PETRI_PLACES=93, PETRI_TRANSITIONS=47} [2024-06-21 18:14:04,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-21 18:14:04,888 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 47 transitions, 306 flow [2024-06-21 18:14:04,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:04,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:04,888 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, 1, 1] [2024-06-21 18:14:04,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 18:14:04,888 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 18:14:04,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:04,889 INFO L85 PathProgramCache]: Analyzing trace with hash 916863517, now seen corresponding path program 28 times [2024-06-21 18:14:04,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:04,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508671724] [2024-06-21 18:14:04,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:04,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:05,004 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 18:14:05,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:05,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508671724] [2024-06-21 18:14:05,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508671724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:05,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:05,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:05,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723478065] [2024-06-21 18:14:05,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:05,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:05,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:05,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:05,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:05,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:05,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 47 transitions, 306 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:05,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:05,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:05,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:05,190 INFO L124 PetriNetUnfolderBase]: 335/640 cut-off events. [2024-06-21 18:14:05,190 INFO L125 PetriNetUnfolderBase]: For 4747/4747 co-relation queries the response was YES. [2024-06-21 18:14:05,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2363 conditions, 640 events. 335/640 cut-off events. For 4747/4747 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3011 event pairs, 116 based on Foata normal form. 18/651 useless extension candidates. Maximal degree in co-relation 2334. Up to 224 conditions per place. [2024-06-21 18:14:05,193 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 40 selfloop transitions, 11 changer transitions 8/67 dead transitions. [2024-06-21 18:14:05,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 67 transitions, 518 flow [2024-06-21 18:14:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-21 18:14:05,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-21 18:14:05,194 INFO L175 Difference]: Start difference. First operand has 93 places, 47 transitions, 306 flow. Second operand 8 states and 170 transitions. [2024-06-21 18:14:05,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 67 transitions, 518 flow [2024-06-21 18:14:05,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 67 transitions, 494 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:05,198 INFO L231 Difference]: Finished difference. Result has 90 places, 45 transitions, 298 flow [2024-06-21 18:14:05,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=298, PETRI_PLACES=90, PETRI_TRANSITIONS=45} [2024-06-21 18:14:05,198 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-21 18:14:05,198 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 45 transitions, 298 flow [2024-06-21 18:14:05,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:05,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:05,199 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, 1, 1] [2024-06-21 18:14:05,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 18:14:05,199 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 18:14:05,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:05,199 INFO L85 PathProgramCache]: Analyzing trace with hash -381714507, now seen corresponding path program 29 times [2024-06-21 18:14:05,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:05,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752013338] [2024-06-21 18:14:05,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:05,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:05,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:05,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752013338] [2024-06-21 18:14:05,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752013338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:05,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:05,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:05,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245303980] [2024-06-21 18:14:05,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:05,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:05,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:05,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:05,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:05,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:05,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 45 transitions, 298 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:05,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:05,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:05,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:05,460 INFO L124 PetriNetUnfolderBase]: 311/598 cut-off events. [2024-06-21 18:14:05,460 INFO L125 PetriNetUnfolderBase]: For 4156/4164 co-relation queries the response was YES. [2024-06-21 18:14:05,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2214 conditions, 598 events. 311/598 cut-off events. For 4156/4164 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2723 event pairs, 132 based on Foata normal form. 18/613 useless extension candidates. Maximal degree in co-relation 2186. Up to 187 conditions per place. [2024-06-21 18:14:05,462 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 36 selfloop transitions, 12 changer transitions 8/64 dead transitions. [2024-06-21 18:14:05,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 64 transitions, 500 flow [2024-06-21 18:14:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:05,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 18:14:05,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-21 18:14:05,463 INFO L175 Difference]: Start difference. First operand has 90 places, 45 transitions, 298 flow. Second operand 8 states and 166 transitions. [2024-06-21 18:14:05,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 64 transitions, 500 flow [2024-06-21 18:14:05,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 64 transitions, 471 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:05,466 INFO L231 Difference]: Finished difference. Result has 89 places, 43 transitions, 287 flow [2024-06-21 18:14:05,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=287, PETRI_PLACES=89, PETRI_TRANSITIONS=43} [2024-06-21 18:14:05,467 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-21 18:14:05,467 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 43 transitions, 287 flow [2024-06-21 18:14:05,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:05,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:05,467 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, 1, 1] [2024-06-21 18:14:05,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 18:14:05,467 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 18:14:05,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:05,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1266188325, now seen corresponding path program 30 times [2024-06-21 18:14:05,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:05,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381288444] [2024-06-21 18:14:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:05,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:05,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:05,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381288444] [2024-06-21 18:14:05,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381288444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:05,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:05,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:05,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212496622] [2024-06-21 18:14:05,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:05,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:05,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:05,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:05,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:05,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:05,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 43 transitions, 287 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:05,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:05,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:05,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:05,714 INFO L124 PetriNetUnfolderBase]: 206/411 cut-off events. [2024-06-21 18:14:05,714 INFO L125 PetriNetUnfolderBase]: For 2491/2499 co-relation queries the response was YES. [2024-06-21 18:14:05,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 411 events. 206/411 cut-off events. For 2491/2499 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1647 event pairs, 108 based on Foata normal form. 18/426 useless extension candidates. Maximal degree in co-relation 1462. Up to 187 conditions per place. [2024-06-21 18:14:05,715 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 24 selfloop transitions, 6 changer transitions 19/57 dead transitions. [2024-06-21 18:14:05,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 57 transitions, 431 flow [2024-06-21 18:14:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 18:14:05,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-21 18:14:05,716 INFO L175 Difference]: Start difference. First operand has 89 places, 43 transitions, 287 flow. Second operand 8 states and 160 transitions. [2024-06-21 18:14:05,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 57 transitions, 431 flow [2024-06-21 18:14:05,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 57 transitions, 404 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:05,718 INFO L231 Difference]: Finished difference. Result has 88 places, 36 transitions, 215 flow [2024-06-21 18:14:05,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=215, PETRI_PLACES=88, PETRI_TRANSITIONS=36} [2024-06-21 18:14:05,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-21 18:14:05,719 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 36 transitions, 215 flow [2024-06-21 18:14:05,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:05,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:05,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:05,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 18:14:05,719 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 18:14:05,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:05,720 INFO L85 PathProgramCache]: Analyzing trace with hash 917249467, now seen corresponding path program 31 times [2024-06-21 18:14:05,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:05,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089633029] [2024-06-21 18:14:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:05,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:05,839 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 18:14:05,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:05,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089633029] [2024-06-21 18:14:05,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089633029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:05,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:05,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:05,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362298554] [2024-06-21 18:14:05,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:05,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:05,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:05,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:05,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:05,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 18:14:05,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 36 transitions, 215 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:05,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:05,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 18:14:05,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:05,966 INFO L124 PetriNetUnfolderBase]: 91/206 cut-off events. [2024-06-21 18:14:05,966 INFO L125 PetriNetUnfolderBase]: For 1079/1079 co-relation queries the response was YES. [2024-06-21 18:14:05,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 206 events. 91/206 cut-off events. For 1079/1079 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 637 event pairs, 7 based on Foata normal form. 18/221 useless extension candidates. Maximal degree in co-relation 652. Up to 96 conditions per place. [2024-06-21 18:14:05,967 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 0 selfloop transitions, 0 changer transitions 44/44 dead transitions. [2024-06-21 18:14:05,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 44 transitions, 291 flow [2024-06-21 18:14:05,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:05,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 18:14:05,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 18:14:05,968 INFO L175 Difference]: Start difference. First operand has 88 places, 36 transitions, 215 flow. Second operand 8 states and 152 transitions. [2024-06-21 18:14:05,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 44 transitions, 291 flow [2024-06-21 18:14:05,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 44 transitions, 247 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 18:14:05,969 INFO L231 Difference]: Finished difference. Result has 72 places, 0 transitions, 0 flow [2024-06-21 18:14:05,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=72, PETRI_TRANSITIONS=0} [2024-06-21 18:14:05,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-21 18:14:05,970 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 0 transitions, 0 flow [2024-06-21 18:14:05,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:05,972 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-21 18:14:05,973 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-21 18:14:05,973 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-21 18:14:05,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-21 18:14:05,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-21 18:14:05,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-21 18:14:05,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 18:14:05,977 INFO L445 BasicCegarLoop]: Path program histogram: [31, 17, 8, 6, 6, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:05,979 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 18:14:05,981 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 18:14:05,985 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-21 18:14:05,985 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-21 18:14:05,986 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 06:14:05 BasicIcfg [2024-06-21 18:14:05,986 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 18:14:05,986 INFO L158 Benchmark]: Toolchain (without parser) took 39670.77ms. Allocated memory was 176.2MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 97.2MB in the beginning and 540.3MB in the end (delta: -443.1MB). Peak memory consumption was 645.5MB. Max. memory is 16.1GB. [2024-06-21 18:14:05,986 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 176.2MB. Free memory is still 127.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 18:14:05,987 INFO L158 Benchmark]: Witness Parser took 0.43ms. Allocated memory is still 176.2MB. Free memory is still 99.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 18:14:05,987 INFO L158 Benchmark]: CACSL2BoogieTranslator took 530.37ms. Allocated memory was 176.2MB in the beginning and 257.9MB in the end (delta: 81.8MB). Free memory was 96.9MB in the beginning and 214.6MB in the end (delta: -117.8MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2024-06-21 18:14:05,987 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.95ms. Allocated memory is still 257.9MB. Free memory was 214.6MB in the beginning and 212.2MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 18:14:05,987 INFO L158 Benchmark]: Boogie Preprocessor took 33.38ms. Allocated memory is still 257.9MB. Free memory was 212.2MB in the beginning and 209.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 18:14:05,987 INFO L158 Benchmark]: RCFGBuilder took 487.14ms. Allocated memory is still 257.9MB. Free memory was 209.4MB in the beginning and 185.3MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-21 18:14:05,988 INFO L158 Benchmark]: TraceAbstraction took 38542.42ms. Allocated memory was 257.9MB in the beginning and 1.3GB in the end (delta: 1.0GB). Free memory was 184.2MB in the beginning and 540.3MB in the end (delta: -356.0MB). Peak memory consumption was 650.6MB. Max. memory is 16.1GB. [2024-06-21 18:14:05,989 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 176.2MB. Free memory is still 127.8MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.43ms. Allocated memory is still 176.2MB. Free memory is still 99.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 530.37ms. Allocated memory was 176.2MB in the beginning and 257.9MB in the end (delta: 81.8MB). Free memory was 96.9MB in the beginning and 214.6MB in the end (delta: -117.8MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.95ms. Allocated memory is still 257.9MB. Free memory was 214.6MB in the beginning and 212.2MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.38ms. Allocated memory is still 257.9MB. Free memory was 212.2MB in the beginning and 209.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 487.14ms. Allocated memory is still 257.9MB. Free memory was 209.4MB in the beginning and 185.3MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 38542.42ms. Allocated memory was 257.9MB in the beginning and 1.3GB in the end (delta: 1.0GB). Free memory was 184.2MB in the beginning and 540.3MB in the end (delta: -356.0MB). Peak memory consumption was 650.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 783]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 785]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 786]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 67 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 38.5s, OverallIterations: 97, TraceHistogramMax: 1, PathProgramHistogramMax: 31, EmptinessCheckTime: 0.0s, AutomataDifference: 25.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6764 SdHoareTripleChecker+Valid, 11.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5206 mSDsluCounter, 1053 SdHoareTripleChecker+Invalid, 9.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 591 mSDsCounter, 1470 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23653 IncrementalHoareTripleChecker+Invalid, 25123 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1470 mSolverCounterUnsat, 462 mSDtfsCounter, 23653 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 678 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 585 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1602occurred in iteration=64, InterpolantAutomatonStates: 709, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 1905 NumberOfCodeBlocks, 1905 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 1808 ConstructedInterpolants, 0 QuantifiedInterpolants, 18481 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 97 InterpolantComputations, 97 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 18:14:06,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE