./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe023_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe023_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:31:27,518 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:31:27,598 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:31:27,604 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:31:27,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:31:27,633 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:31:27,635 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:31:27,635 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:31:27,636 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:31:27,639 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:31:27,640 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:31:27,640 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:31:27,641 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:31:27,642 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:31:27,642 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:31:27,643 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:31:27,643 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:31:27,643 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:31:27,644 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:31:27,644 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:31:27,644 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:31:27,645 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:31:27,645 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:31:27,645 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:31:27,646 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:31:27,646 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:31:27,646 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:31:27,646 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:31:27,647 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:31:27,647 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:31:27,648 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:31:27,648 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:31:27,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:31:27,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:31:27,649 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:31:27,649 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:31:27,650 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:31:27,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:31:27,650 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:31:27,650 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:31:27,651 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:31:27,651 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:31:27,651 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:31:27,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:31:27,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:31:27,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:31:27,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:31:27,902 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:31:27,903 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:31:27,904 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe023_tso.yml/witness.yml [2024-06-27 19:31:28,053 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:31:28,053 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:31:28,054 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-06-27 19:31:29,128 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:31:29,381 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:31:29,382 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-06-27 19:31:29,396 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f681bcfab/59477a5d209443f7b7f953b2ab24bd1f/FLAGfce278ebc [2024-06-27 19:31:29,409 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f681bcfab/59477a5d209443f7b7f953b2ab24bd1f [2024-06-27 19:31:29,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:31:29,411 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:31:29,414 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:31:29,415 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:31:29,419 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:31:29,420 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:31:28" (1/2) ... [2024-06-27 19:31:29,421 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@663e2d2b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:31:29, skipping insertion in model container [2024-06-27 19:31:29,421 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:31:28" (1/2) ... [2024-06-27 19:31:29,423 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3175310d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:31:29, skipping insertion in model container [2024-06-27 19:31:29,423 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:31:29" (2/2) ... [2024-06-27 19:31:29,423 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@663e2d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:31:29, skipping insertion in model container [2024-06-27 19:31:29,424 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:31:29" (2/2) ... [2024-06-27 19:31:29,424 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:31:29,473 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:31:29,474 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 19:31:29,474 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 19:31:29,474 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 19:31:29,475 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:31:29,475 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-27 19:31:29,519 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:31:29,920 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:31:29,930 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:31:30,032 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:31:30,107 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:31:30,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:31:30 WrapperNode [2024-06-27 19:31:30,116 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:31:30,117 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:31:30,117 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:31:30,117 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:31:30,124 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:31:30" (1/1) ... [2024-06-27 19:31:30,142 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:31:30" (1/1) ... [2024-06-27 19:31:30,163 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-27 19:31:30,163 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:31:30,164 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:31:30,164 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:31:30,164 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:31:30,172 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:31:30" (1/1) ... [2024-06-27 19:31:30,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:31:30" (1/1) ... [2024-06-27 19:31:30,174 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:31:30" (1/1) ... [2024-06-27 19:31:30,186 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 19:31:30,187 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:31:30" (1/1) ... [2024-06-27 19:31:30,187 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:31:30" (1/1) ... [2024-06-27 19:31:30,192 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:31:30" (1/1) ... [2024-06-27 19:31:30,194 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:31:30" (1/1) ... [2024-06-27 19:31:30,196 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:31:30" (1/1) ... [2024-06-27 19:31:30,197 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:31:30" (1/1) ... [2024-06-27 19:31:30,199 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:31:30,200 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:31:30,200 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:31:30,200 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:31:30,201 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:31:30" (1/1) ... [2024-06-27 19:31:30,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:31:30,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:31:30,237 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 19:31:30,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 19:31:30,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:31:30,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:31:30,268 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:31:30,268 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:31:30,268 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:31:30,268 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:31:30,269 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:31:30,269 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:31:30,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:31:30,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:31:30,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:31:30,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:31:30,270 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:31:30,370 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:31:30,372 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:31:30,621 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:31:30,622 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:31:30,716 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:31:30,717 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:31:30,717 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:31:30 BoogieIcfgContainer [2024-06-27 19:31:30,717 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:31:30,719 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:31:30,719 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:31:30,722 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:31:30,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:31:28" (1/4) ... [2024-06-27 19:31:30,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a87591a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:31:30, skipping insertion in model container [2024-06-27 19:31:30,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:31:29" (2/4) ... [2024-06-27 19:31:30,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a87591a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:31:30, skipping insertion in model container [2024-06-27 19:31:30,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:31:30" (3/4) ... [2024-06-27 19:31:30,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a87591a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:31:30, skipping insertion in model container [2024-06-27 19:31:30,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:31:30" (4/4) ... [2024-06-27 19:31:30,724 INFO L112 eAbstractionObserver]: Analyzing ICFG safe023_tso.i [2024-06-27 19:31:30,743 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:31:30,744 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:31:30,744 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:31:30,802 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:31:30,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 19:31:30,875 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 19:31:30,875 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:31:30,877 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. [2024-06-27 19:31:30,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 19:31:30,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 19:31:30,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:31:30,903 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;@4c97489b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:31:30,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:31:30,907 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:31:30,908 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:31:30,908 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:31:30,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:30,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:31:30,909 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)] === [2024-06-27 19:31:30,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:30,914 INFO L85 PathProgramCache]: Analyzing trace with hash 219069644, now seen corresponding path program 1 times [2024-06-27 19:31:30,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:30,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804029942] [2024-06-27 19:31:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:30,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:31,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:31,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804029942] [2024-06-27 19:31:31,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804029942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:31,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:31,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:31:31,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522768846] [2024-06-27 19:31:31,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:31,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:31:31,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:31,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:31:31,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:31:31,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-06-27 19:31:31,381 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) [2024-06-27 19:31:31,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:31,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-06-27 19:31:31,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:31,575 INFO L124 PetriNetUnfolderBase]: 470/794 cut-off events. [2024-06-27 19:31:31,575 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 19:31:31,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1593 conditions, 794 events. 470/794 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3834 event pairs, 281 based on Foata normal form. 1/747 useless extension candidates. Maximal degree in co-relation 1581. Up to 736 conditions per place. [2024-06-27 19:31:31,587 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 27 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 19:31:31,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 161 flow [2024-06-27 19:31:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:31:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:31:31,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-27 19:31:31,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7154471544715447 [2024-06-27 19:31:31,600 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 88 transitions. [2024-06-27 19:31:31,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 161 flow [2024-06-27 19:31:31,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:31:31,605 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 19:31:31,607 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} [2024-06-27 19:31:31,612 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 19:31:31,613 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 19:31:31,613 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) [2024-06-27 19:31:31,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:31,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:31,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:31:31,614 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)] === [2024-06-27 19:31:31,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:31,615 INFO L85 PathProgramCache]: Analyzing trace with hash 73227933, now seen corresponding path program 1 times [2024-06-27 19:31:31,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:31,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650418997] [2024-06-27 19:31:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:31,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:31,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:31,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650418997] [2024-06-27 19:31:31,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650418997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:31,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:31,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:31:31,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343632118] [2024-06-27 19:31:31,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:31,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:31:31,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:31,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:31:31,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:31:31,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:31:31,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:31,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:31,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:31:31,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:31,952 INFO L124 PetriNetUnfolderBase]: 781/1324 cut-off events. [2024-06-27 19:31:31,952 INFO L125 PetriNetUnfolderBase]: For 253/253 co-relation queries the response was YES. [2024-06-27 19:31:31,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2966 conditions, 1324 events. 781/1324 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6753 event pairs, 376 based on Foata normal form. 5/1321 useless extension candidates. Maximal degree in co-relation 2954. Up to 1146 conditions per place. [2024-06-27 19:31:31,964 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 42 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-06-27 19:31:31,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 278 flow [2024-06-27 19:31:31,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:31:31,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:31:31,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-27 19:31:31,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7012195121951219 [2024-06-27 19:31:31,967 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 115 transitions. [2024-06-27 19:31:31,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 278 flow [2024-06-27 19:31:31,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:31:31,969 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 171 flow [2024-06-27 19:31:31,969 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=171, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2024-06-27 19:31:31,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-27 19:31:31,970 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 171 flow [2024-06-27 19:31:31,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:31,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:31,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:31,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:31:31,971 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)] === [2024-06-27 19:31:31,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:31,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1652603324, now seen corresponding path program 1 times [2024-06-27 19:31:31,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:31,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414760595] [2024-06-27 19:31:31,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:31,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:32,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:32,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414760595] [2024-06-27 19:31:32,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414760595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:32,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:32,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:31:32,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955074975] [2024-06-27 19:31:32,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:32,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:31:32,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:32,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:31:32,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:31:32,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:31:32,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 171 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:32,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:32,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:31:32,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:32,353 INFO L124 PetriNetUnfolderBase]: 789/1356 cut-off events. [2024-06-27 19:31:32,353 INFO L125 PetriNetUnfolderBase]: For 893/934 co-relation queries the response was YES. [2024-06-27 19:31:32,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3593 conditions, 1356 events. 789/1356 cut-off events. For 893/934 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7094 event pairs, 265 based on Foata normal form. 15/1360 useless extension candidates. Maximal degree in co-relation 3578. Up to 1114 conditions per place. [2024-06-27 19:31:32,366 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 50 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-27 19:31:32,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 399 flow [2024-06-27 19:31:32,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:31:32,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:31:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-27 19:31:32,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.697560975609756 [2024-06-27 19:31:32,372 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 171 flow. Second operand 5 states and 143 transitions. [2024-06-27 19:31:32,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 399 flow [2024-06-27 19:31:32,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 75 transitions, 397 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 19:31:32,377 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 246 flow [2024-06-27 19:31:32,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-06-27 19:31:32,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-27 19:31:32,379 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 246 flow [2024-06-27 19:31:32,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:32,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:32,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:32,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:31:32,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:32,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:32,381 INFO L85 PathProgramCache]: Analyzing trace with hash 627902782, now seen corresponding path program 1 times [2024-06-27 19:31:32,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:32,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432989266] [2024-06-27 19:31:32,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:32,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:32,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:32,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432989266] [2024-06-27 19:31:32,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432989266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:32,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:32,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:31:32,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543271167] [2024-06-27 19:31:32,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:32,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:31:32,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:32,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:31:32,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:31:32,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:31:32,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 246 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:32,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:32,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:31:32,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:32,720 INFO L124 PetriNetUnfolderBase]: 773/1296 cut-off events. [2024-06-27 19:31:32,720 INFO L125 PetriNetUnfolderBase]: For 1645/1660 co-relation queries the response was YES. [2024-06-27 19:31:32,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3945 conditions, 1296 events. 773/1296 cut-off events. For 1645/1660 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6611 event pairs, 312 based on Foata normal form. 15/1305 useless extension candidates. Maximal degree in co-relation 3927. Up to 1140 conditions per place. [2024-06-27 19:31:32,731 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 44 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2024-06-27 19:31:32,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 395 flow [2024-06-27 19:31:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:31:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:31:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-27 19:31:32,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2024-06-27 19:31:32,734 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 246 flow. Second operand 4 states and 109 transitions. [2024-06-27 19:31:32,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 395 flow [2024-06-27 19:31:32,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 381 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 19:31:32,743 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 285 flow [2024-06-27 19:31:32,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2024-06-27 19:31:32,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-27 19:31:32,745 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 285 flow [2024-06-27 19:31:32,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:32,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:32,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:32,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:31:32,746 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:32,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:32,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1847914485, now seen corresponding path program 1 times [2024-06-27 19:31:32,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:32,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619386266] [2024-06-27 19:31:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:32,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:32,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:32,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619386266] [2024-06-27 19:31:32,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619386266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:32,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:32,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:32,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158950845] [2024-06-27 19:31:32,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:32,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:32,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:32,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:32,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:32,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:31:32,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 285 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:32,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:32,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:31:32,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:33,187 INFO L124 PetriNetUnfolderBase]: 781/1329 cut-off events. [2024-06-27 19:31:33,187 INFO L125 PetriNetUnfolderBase]: For 2268/2351 co-relation queries the response was YES. [2024-06-27 19:31:33,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4188 conditions, 1329 events. 781/1329 cut-off events. For 2268/2351 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6835 event pairs, 210 based on Foata normal form. 30/1350 useless extension candidates. Maximal degree in co-relation 4166. Up to 1064 conditions per place. [2024-06-27 19:31:33,199 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 54 selfloop transitions, 20 changer transitions 0/83 dead transitions. [2024-06-27 19:31:33,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 83 transitions, 531 flow [2024-06-27 19:31:33,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:33,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-27 19:31:33,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6747967479674797 [2024-06-27 19:31:33,201 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 285 flow. Second operand 6 states and 166 transitions. [2024-06-27 19:31:33,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 83 transitions, 531 flow [2024-06-27 19:31:33,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 83 transitions, 521 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 19:31:33,208 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 341 flow [2024-06-27 19:31:33,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-27 19:31:33,211 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-27 19:31:33,211 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 341 flow [2024-06-27 19:31:33,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:33,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:33,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:33,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:31:33,216 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:33,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:33,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2009849483, now seen corresponding path program 1 times [2024-06-27 19:31:33,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:33,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264514087] [2024-06-27 19:31:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:33,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:33,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:33,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264514087] [2024-06-27 19:31:33,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264514087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:33,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:33,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:31:33,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102753800] [2024-06-27 19:31:33,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:33,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:31:33,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:33,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:31:33,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:31:33,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:33,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 341 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:33,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:33,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:33,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:33,580 INFO L124 PetriNetUnfolderBase]: 955/1564 cut-off events. [2024-06-27 19:31:33,581 INFO L125 PetriNetUnfolderBase]: For 3559/3559 co-relation queries the response was YES. [2024-06-27 19:31:33,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5352 conditions, 1564 events. 955/1564 cut-off events. For 3559/3559 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7926 event pairs, 342 based on Foata normal form. 4/1562 useless extension candidates. Maximal degree in co-relation 5328. Up to 1371 conditions per place. [2024-06-27 19:31:33,595 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 65 selfloop transitions, 15 changer transitions 0/88 dead transitions. [2024-06-27 19:31:33,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 671 flow [2024-06-27 19:31:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:31:33,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:31:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-27 19:31:33,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-27 19:31:33,597 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 341 flow. Second operand 5 states and 131 transitions. [2024-06-27 19:31:33,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 671 flow [2024-06-27 19:31:33,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 88 transitions, 609 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:33,604 INFO L231 Difference]: Finished difference. Result has 62 places, 69 transitions, 444 flow [2024-06-27 19:31:33,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=444, PETRI_PLACES=62, PETRI_TRANSITIONS=69} [2024-06-27 19:31:33,605 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-27 19:31:33,605 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 69 transitions, 444 flow [2024-06-27 19:31:33,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:33,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:33,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:33,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:31:33,606 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)] === [2024-06-27 19:31:33,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:33,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1285390740, now seen corresponding path program 1 times [2024-06-27 19:31:33,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:33,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087989400] [2024-06-27 19:31:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:33,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:33,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:33,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087989400] [2024-06-27 19:31:33,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087989400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:33,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:33,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:31:33,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776069010] [2024-06-27 19:31:33,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:33,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:31:33,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:33,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:31:33,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:31:33,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:33,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 69 transitions, 444 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:33,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:33,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:33,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:33,944 INFO L124 PetriNetUnfolderBase]: 966/1593 cut-off events. [2024-06-27 19:31:33,944 INFO L125 PetriNetUnfolderBase]: For 4428/4434 co-relation queries the response was YES. [2024-06-27 19:31:33,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5800 conditions, 1593 events. 966/1593 cut-off events. For 4428/4434 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8114 event pairs, 343 based on Foata normal form. 2/1589 useless extension candidates. Maximal degree in co-relation 5773. Up to 1383 conditions per place. [2024-06-27 19:31:33,959 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 68 selfloop transitions, 19 changer transitions 0/95 dead transitions. [2024-06-27 19:31:33,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 95 transitions, 731 flow [2024-06-27 19:31:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:31:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:31:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-27 19:31:33,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6536585365853659 [2024-06-27 19:31:33,960 INFO L175 Difference]: Start difference. First operand has 62 places, 69 transitions, 444 flow. Second operand 5 states and 134 transitions. [2024-06-27 19:31:33,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 95 transitions, 731 flow [2024-06-27 19:31:33,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 95 transitions, 725 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 19:31:33,969 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 547 flow [2024-06-27 19:31:33,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=547, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-27 19:31:33,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-27 19:31:33,970 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 547 flow [2024-06-27 19:31:33,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:33,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:33,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:33,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:31:33,971 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:33,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:33,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1269945300, now seen corresponding path program 2 times [2024-06-27 19:31:33,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:33,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107376147] [2024-06-27 19:31:33,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:33,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:34,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:34,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107376147] [2024-06-27 19:31:34,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107376147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:34,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:34,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:31:34,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226343038] [2024-06-27 19:31:34,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:34,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:31:34,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:34,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:31:34,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:31:34,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:34,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 547 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:34,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:34,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:34,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:34,315 INFO L124 PetriNetUnfolderBase]: 961/1582 cut-off events. [2024-06-27 19:31:34,315 INFO L125 PetriNetUnfolderBase]: For 5683/5689 co-relation queries the response was YES. [2024-06-27 19:31:34,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6074 conditions, 1582 events. 961/1582 cut-off events. For 5683/5689 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8053 event pairs, 346 based on Foata normal form. 6/1581 useless extension candidates. Maximal degree in co-relation 6042. Up to 1378 conditions per place. [2024-06-27 19:31:34,330 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 65 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2024-06-27 19:31:34,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 91 transitions, 759 flow [2024-06-27 19:31:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:31:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:31:34,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 19:31:34,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-27 19:31:34,338 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 547 flow. Second operand 5 states and 127 transitions. [2024-06-27 19:31:34,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 91 transitions, 759 flow [2024-06-27 19:31:34,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 91 transitions, 742 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 19:31:34,349 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 582 flow [2024-06-27 19:31:34,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=582, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-27 19:31:34,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-27 19:31:34,352 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 582 flow [2024-06-27 19:31:34,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:34,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:34,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:34,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:31:34,353 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)] === [2024-06-27 19:31:34,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:34,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1269955220, now seen corresponding path program 1 times [2024-06-27 19:31:34,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:34,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341826346] [2024-06-27 19:31:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:34,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:34,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:34,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341826346] [2024-06-27 19:31:34,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341826346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:34,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:34,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:34,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926696269] [2024-06-27 19:31:34,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:34,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:34,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:34,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:34,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:34,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:34,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 582 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:34,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:34,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:34,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:34,785 INFO L124 PetriNetUnfolderBase]: 970/1590 cut-off events. [2024-06-27 19:31:34,785 INFO L125 PetriNetUnfolderBase]: For 6733/6733 co-relation queries the response was YES. [2024-06-27 19:31:34,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6232 conditions, 1590 events. 970/1590 cut-off events. For 6733/6733 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8048 event pairs, 316 based on Foata normal form. 8/1591 useless extension candidates. Maximal degree in co-relation 6198. Up to 1357 conditions per place. [2024-06-27 19:31:34,802 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 68 selfloop transitions, 23 changer transitions 0/99 dead transitions. [2024-06-27 19:31:34,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 99 transitions, 832 flow [2024-06-27 19:31:34,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:34,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:34,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:31:34,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-27 19:31:34,805 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 582 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:31:34,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 99 transitions, 832 flow [2024-06-27 19:31:34,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 806 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 19:31:34,818 INFO L231 Difference]: Finished difference. Result has 77 places, 79 transitions, 634 flow [2024-06-27 19:31:34,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=71, 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=6, PETRI_FLOW=634, PETRI_PLACES=77, PETRI_TRANSITIONS=79} [2024-06-27 19:31:34,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-27 19:31:34,820 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 79 transitions, 634 flow [2024-06-27 19:31:34,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:34,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:34,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:34,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:31:34,821 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)] === [2024-06-27 19:31:34,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:34,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1804174214, now seen corresponding path program 1 times [2024-06-27 19:31:34,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:34,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8457975] [2024-06-27 19:31:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:34,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:34,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:34,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8457975] [2024-06-27 19:31:34,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8457975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:34,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:34,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:34,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737292871] [2024-06-27 19:31:34,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:34,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:34,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:34,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:34,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:35,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:31:35,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 79 transitions, 634 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:35,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:35,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:31:35,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:35,232 INFO L124 PetriNetUnfolderBase]: 925/1552 cut-off events. [2024-06-27 19:31:35,232 INFO L125 PetriNetUnfolderBase]: For 9044/9077 co-relation queries the response was YES. [2024-06-27 19:31:35,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6486 conditions, 1552 events. 925/1552 cut-off events. For 9044/9077 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8142 event pairs, 286 based on Foata normal form. 33/1535 useless extension candidates. Maximal degree in co-relation 6450. Up to 1266 conditions per place. [2024-06-27 19:31:35,255 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 67 selfloop transitions, 26 changer transitions 0/109 dead transitions. [2024-06-27 19:31:35,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 940 flow [2024-06-27 19:31:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:35,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-27 19:31:35,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 19:31:35,258 INFO L175 Difference]: Start difference. First operand has 77 places, 79 transitions, 634 flow. Second operand 6 states and 164 transitions. [2024-06-27 19:31:35,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 940 flow [2024-06-27 19:31:35,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 109 transitions, 886 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:35,276 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 656 flow [2024-06-27 19:31:35,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=656, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-06-27 19:31:35,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-27 19:31:35,278 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 656 flow [2024-06-27 19:31:35,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:35,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:35,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:35,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:31:35,278 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:35,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:35,279 INFO L85 PathProgramCache]: Analyzing trace with hash 166940894, now seen corresponding path program 2 times [2024-06-27 19:31:35,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:35,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521911463] [2024-06-27 19:31:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:35,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:35,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:35,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521911463] [2024-06-27 19:31:35,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521911463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:35,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:35,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:31:35,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139974196] [2024-06-27 19:31:35,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:35,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:31:35,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:35,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:31:35,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:31:35,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:31:35,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 656 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) [2024-06-27 19:31:35,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:35,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:31:35,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:35,649 INFO L124 PetriNetUnfolderBase]: 934/1552 cut-off events. [2024-06-27 19:31:35,649 INFO L125 PetriNetUnfolderBase]: For 10164/10192 co-relation queries the response was YES. [2024-06-27 19:31:35,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6631 conditions, 1552 events. 934/1552 cut-off events. For 10164/10192 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8117 event pairs, 297 based on Foata normal form. 21/1515 useless extension candidates. Maximal degree in co-relation 6594. Up to 1283 conditions per place. [2024-06-27 19:31:35,663 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-27 19:31:35,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 97 transitions, 856 flow [2024-06-27 19:31:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:31:35,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:31:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-27 19:31:35,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-27 19:31:35,665 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 656 flow. Second operand 5 states and 133 transitions. [2024-06-27 19:31:35,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 97 transitions, 856 flow [2024-06-27 19:31:35,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 97 transitions, 800 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:35,679 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 661 flow [2024-06-27 19:31:35,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=661, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2024-06-27 19:31:35,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-27 19:31:35,680 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 661 flow [2024-06-27 19:31:35,680 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) [2024-06-27 19:31:35,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:35,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:35,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:31:35,681 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:35,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:35,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1860072281, now seen corresponding path program 1 times [2024-06-27 19:31:35,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:35,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754505699] [2024-06-27 19:31:35,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:35,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:35,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:35,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754505699] [2024-06-27 19:31:35,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754505699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:35,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:35,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:35,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381726855] [2024-06-27 19:31:35,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:35,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:35,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:35,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:35,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:35,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:35,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 661 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:35,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:35,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:35,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:36,138 INFO L124 PetriNetUnfolderBase]: 1005/1660 cut-off events. [2024-06-27 19:31:36,138 INFO L125 PetriNetUnfolderBase]: For 10494/10500 co-relation queries the response was YES. [2024-06-27 19:31:36,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6973 conditions, 1660 events. 1005/1660 cut-off events. For 10494/10500 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8494 event pairs, 317 based on Foata normal form. 2/1656 useless extension candidates. Maximal degree in co-relation 6935. Up to 1356 conditions per place. [2024-06-27 19:31:36,152 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 92 selfloop transitions, 32 changer transitions 0/132 dead transitions. [2024-06-27 19:31:36,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 132 transitions, 1181 flow [2024-06-27 19:31:36,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:36,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:36,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 19:31:36,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-27 19:31:36,154 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 661 flow. Second operand 7 states and 186 transitions. [2024-06-27 19:31:36,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 132 transitions, 1181 flow [2024-06-27 19:31:36,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 132 transitions, 1100 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:36,175 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 785 flow [2024-06-27 19:31:36,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=785, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2024-06-27 19:31:36,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-27 19:31:36,177 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 785 flow [2024-06-27 19:31:36,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:36,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:36,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:36,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:31:36,178 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:36,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:36,179 INFO L85 PathProgramCache]: Analyzing trace with hash 880408563, now seen corresponding path program 2 times [2024-06-27 19:31:36,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:36,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895706362] [2024-06-27 19:31:36,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:36,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:36,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:36,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895706362] [2024-06-27 19:31:36,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895706362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:36,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:36,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:36,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534408386] [2024-06-27 19:31:36,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:36,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:36,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:36,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:36,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:36,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:36,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 785 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) [2024-06-27 19:31:36,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:36,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:36,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:36,571 INFO L124 PetriNetUnfolderBase]: 1016/1662 cut-off events. [2024-06-27 19:31:36,571 INFO L125 PetriNetUnfolderBase]: For 12293/12293 co-relation queries the response was YES. [2024-06-27 19:31:36,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7512 conditions, 1662 events. 1016/1662 cut-off events. For 12293/12293 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8463 event pairs, 327 based on Foata normal form. 2/1652 useless extension candidates. Maximal degree in co-relation 7471. Up to 1368 conditions per place. [2024-06-27 19:31:36,587 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 82 selfloop transitions, 36 changer transitions 0/126 dead transitions. [2024-06-27 19:31:36,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 126 transitions, 1215 flow [2024-06-27 19:31:36,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 19:31:36,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-27 19:31:36,590 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 785 flow. Second operand 6 states and 158 transitions. [2024-06-27 19:31:36,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 126 transitions, 1215 flow [2024-06-27 19:31:36,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 126 transitions, 1187 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 19:31:36,655 INFO L231 Difference]: Finished difference. Result has 92 places, 102 transitions, 888 flow [2024-06-27 19:31:36,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=888, PETRI_PLACES=92, PETRI_TRANSITIONS=102} [2024-06-27 19:31:36,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-27 19:31:36,656 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 102 transitions, 888 flow [2024-06-27 19:31:36,657 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) [2024-06-27 19:31:36,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:36,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:36,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:31:36,657 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:36,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:36,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1129250393, now seen corresponding path program 3 times [2024-06-27 19:31:36,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:36,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099867830] [2024-06-27 19:31:36,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:36,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:36,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:36,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099867830] [2024-06-27 19:31:36,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099867830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:36,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:36,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:36,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457635290] [2024-06-27 19:31:36,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:36,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:36,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:36,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:36,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:36,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:36,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 102 transitions, 888 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) [2024-06-27 19:31:36,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:36,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:36,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:37,061 INFO L124 PetriNetUnfolderBase]: 1011/1655 cut-off events. [2024-06-27 19:31:37,061 INFO L125 PetriNetUnfolderBase]: For 13841/13841 co-relation queries the response was YES. [2024-06-27 19:31:37,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7758 conditions, 1655 events. 1011/1655 cut-off events. For 13841/13841 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8425 event pairs, 327 based on Foata normal form. 2/1645 useless extension candidates. Maximal degree in co-relation 7713. Up to 1363 conditions per place. [2024-06-27 19:31:37,077 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 81 selfloop transitions, 35 changer transitions 0/124 dead transitions. [2024-06-27 19:31:37,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 124 transitions, 1229 flow [2024-06-27 19:31:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:37,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:37,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 19:31:37,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:31:37,079 INFO L175 Difference]: Start difference. First operand has 92 places, 102 transitions, 888 flow. Second operand 6 states and 156 transitions. [2024-06-27 19:31:37,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 124 transitions, 1229 flow [2024-06-27 19:31:37,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 124 transitions, 1172 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 19:31:37,106 INFO L231 Difference]: Finished difference. Result has 96 places, 102 transitions, 909 flow [2024-06-27 19:31:37,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=909, PETRI_PLACES=96, PETRI_TRANSITIONS=102} [2024-06-27 19:31:37,107 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-27 19:31:37,107 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 102 transitions, 909 flow [2024-06-27 19:31:37,107 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) [2024-06-27 19:31:37,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:37,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:37,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:31:37,108 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:37,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:37,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1672712781, now seen corresponding path program 4 times [2024-06-27 19:31:37,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:37,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329457051] [2024-06-27 19:31:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:37,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:37,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:37,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329457051] [2024-06-27 19:31:37,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329457051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:37,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:37,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:37,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117503192] [2024-06-27 19:31:37,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:37,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:37,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:37,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:37,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:37,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:37,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 102 transitions, 909 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) [2024-06-27 19:31:37,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:37,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:37,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:37,519 INFO L124 PetriNetUnfolderBase]: 1022/1696 cut-off events. [2024-06-27 19:31:37,519 INFO L125 PetriNetUnfolderBase]: For 15889/15895 co-relation queries the response was YES. [2024-06-27 19:31:37,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7997 conditions, 1696 events. 1022/1696 cut-off events. For 15889/15895 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8768 event pairs, 329 based on Foata normal form. 2/1691 useless extension candidates. Maximal degree in co-relation 7951. Up to 1375 conditions per place. [2024-06-27 19:31:37,535 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 86 selfloop transitions, 39 changer transitions 0/133 dead transitions. [2024-06-27 19:31:37,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 1313 flow [2024-06-27 19:31:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:37,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-27 19:31:37,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-27 19:31:37,537 INFO L175 Difference]: Start difference. First operand has 96 places, 102 transitions, 909 flow. Second operand 6 states and 162 transitions. [2024-06-27 19:31:37,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 1313 flow [2024-06-27 19:31:37,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 133 transitions, 1213 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:31:37,564 INFO L231 Difference]: Finished difference. Result has 98 places, 106 transitions, 936 flow [2024-06-27 19:31:37,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=936, PETRI_PLACES=98, PETRI_TRANSITIONS=106} [2024-06-27 19:31:37,565 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-27 19:31:37,565 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 106 transitions, 936 flow [2024-06-27 19:31:37,565 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) [2024-06-27 19:31:37,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:37,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:37,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:31:37,566 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:37,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:37,566 INFO L85 PathProgramCache]: Analyzing trace with hash 646738483, now seen corresponding path program 5 times [2024-06-27 19:31:37,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:37,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958400245] [2024-06-27 19:31:37,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:37,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:37,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:37,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958400245] [2024-06-27 19:31:37,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958400245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:37,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:37,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:37,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271379982] [2024-06-27 19:31:37,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:37,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:37,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:37,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:37,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:37,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:37,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 106 transitions, 936 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) [2024-06-27 19:31:37,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:37,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:37,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:37,892 INFO L124 PetriNetUnfolderBase]: 1033/1707 cut-off events. [2024-06-27 19:31:37,893 INFO L125 PetriNetUnfolderBase]: For 17820/17826 co-relation queries the response was YES. [2024-06-27 19:31:37,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8254 conditions, 1707 events. 1033/1707 cut-off events. For 17820/17826 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8820 event pairs, 331 based on Foata normal form. 6/1702 useless extension candidates. Maximal degree in co-relation 8207. Up to 1387 conditions per place. [2024-06-27 19:31:37,908 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 82 selfloop transitions, 41 changer transitions 0/131 dead transitions. [2024-06-27 19:31:37,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 131 transitions, 1332 flow [2024-06-27 19:31:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:37,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:37,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:31:37,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:31:37,910 INFO L175 Difference]: Start difference. First operand has 98 places, 106 transitions, 936 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:31:37,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 131 transitions, 1332 flow [2024-06-27 19:31:37,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 131 transitions, 1244 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:37,966 INFO L231 Difference]: Finished difference. Result has 100 places, 110 transitions, 976 flow [2024-06-27 19:31:37,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=976, PETRI_PLACES=100, PETRI_TRANSITIONS=110} [2024-06-27 19:31:37,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-27 19:31:37,967 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 110 transitions, 976 flow [2024-06-27 19:31:37,968 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) [2024-06-27 19:31:37,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:37,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:37,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:31:37,968 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)] === [2024-06-27 19:31:37,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:37,969 INFO L85 PathProgramCache]: Analyzing trace with hash 390237973, now seen corresponding path program 6 times [2024-06-27 19:31:37,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:37,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458922392] [2024-06-27 19:31:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:37,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:38,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:38,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458922392] [2024-06-27 19:31:38,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458922392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:38,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:38,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:38,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010929686] [2024-06-27 19:31:38,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:38,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:38,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:38,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:38,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:38,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:38,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 110 transitions, 976 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) [2024-06-27 19:31:38,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:38,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:38,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:38,329 INFO L124 PetriNetUnfolderBase]: 1028/1710 cut-off events. [2024-06-27 19:31:38,330 INFO L125 PetriNetUnfolderBase]: For 18917/18923 co-relation queries the response was YES. [2024-06-27 19:31:38,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8307 conditions, 1710 events. 1028/1710 cut-off events. For 18917/18923 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8903 event pairs, 329 based on Foata normal form. 2/1705 useless extension candidates. Maximal degree in co-relation 8259. Up to 1382 conditions per place. [2024-06-27 19:31:38,347 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 82 selfloop transitions, 42 changer transitions 0/132 dead transitions. [2024-06-27 19:31:38,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 132 transitions, 1280 flow [2024-06-27 19:31:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:38,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 19:31:38,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-27 19:31:38,348 INFO L175 Difference]: Start difference. First operand has 100 places, 110 transitions, 976 flow. Second operand 6 states and 157 transitions. [2024-06-27 19:31:38,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 132 transitions, 1280 flow [2024-06-27 19:31:38,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 132 transitions, 1232 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 19:31:38,383 INFO L231 Difference]: Finished difference. Result has 104 places, 110 transitions, 1020 flow [2024-06-27 19:31:38,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1020, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2024-06-27 19:31:38,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-27 19:31:38,384 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 1020 flow [2024-06-27 19:31:38,384 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) [2024-06-27 19:31:38,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:38,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:38,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:31:38,385 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:38,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:38,386 INFO L85 PathProgramCache]: Analyzing trace with hash 268217995, now seen corresponding path program 1 times [2024-06-27 19:31:38,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:38,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045811355] [2024-06-27 19:31:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:38,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:38,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:38,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045811355] [2024-06-27 19:31:38,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045811355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:38,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:38,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:38,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258226217] [2024-06-27 19:31:38,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:38,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:38,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:38,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:38,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:38,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:38,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 1020 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) [2024-06-27 19:31:38,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:38,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:38,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:38,796 INFO L124 PetriNetUnfolderBase]: 1045/1736 cut-off events. [2024-06-27 19:31:38,796 INFO L125 PetriNetUnfolderBase]: For 21539/21545 co-relation queries the response was YES. [2024-06-27 19:31:38,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8555 conditions, 1736 events. 1045/1736 cut-off events. For 21539/21545 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9004 event pairs, 309 based on Foata normal form. 4/1734 useless extension candidates. Maximal degree in co-relation 8505. Up to 1487 conditions per place. [2024-06-27 19:31:38,814 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 105 selfloop transitions, 22 changer transitions 0/135 dead transitions. [2024-06-27 19:31:38,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 135 transitions, 1348 flow [2024-06-27 19:31:38,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:38,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 19:31:38,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-27 19:31:38,816 INFO L175 Difference]: Start difference. First operand has 104 places, 110 transitions, 1020 flow. Second operand 6 states and 154 transitions. [2024-06-27 19:31:38,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 135 transitions, 1348 flow [2024-06-27 19:31:38,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 135 transitions, 1258 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:38,854 INFO L231 Difference]: Finished difference. Result has 106 places, 112 transitions, 1001 flow [2024-06-27 19:31:38,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1001, PETRI_PLACES=106, PETRI_TRANSITIONS=112} [2024-06-27 19:31:38,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-27 19:31:38,855 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 112 transitions, 1001 flow [2024-06-27 19:31:38,855 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) [2024-06-27 19:31:38,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:38,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:38,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:31:38,856 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)] === [2024-06-27 19:31:38,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:38,856 INFO L85 PathProgramCache]: Analyzing trace with hash 397395749, now seen corresponding path program 2 times [2024-06-27 19:31:38,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:38,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621281967] [2024-06-27 19:31:38,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:38,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:38,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:38,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621281967] [2024-06-27 19:31:38,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621281967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:38,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:38,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:38,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116869729] [2024-06-27 19:31:38,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:38,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:38,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:38,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:39,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:39,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 112 transitions, 1001 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) [2024-06-27 19:31:39,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:39,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:39,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:39,251 INFO L124 PetriNetUnfolderBase]: 1062/1764 cut-off events. [2024-06-27 19:31:39,252 INFO L125 PetriNetUnfolderBase]: For 24166/24172 co-relation queries the response was YES. [2024-06-27 19:31:39,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8834 conditions, 1764 events. 1062/1764 cut-off events. For 24166/24172 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9229 event pairs, 317 based on Foata normal form. 8/1765 useless extension candidates. Maximal degree in co-relation 8783. Up to 1514 conditions per place. [2024-06-27 19:31:39,269 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 106 selfloop transitions, 20 changer transitions 0/134 dead transitions. [2024-06-27 19:31:39,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 134 transitions, 1323 flow [2024-06-27 19:31:39,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:31:39,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-27 19:31:39,271 INFO L175 Difference]: Start difference. First operand has 106 places, 112 transitions, 1001 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:31:39,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 134 transitions, 1323 flow [2024-06-27 19:31:39,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 134 transitions, 1280 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 19:31:39,305 INFO L231 Difference]: Finished difference. Result has 109 places, 114 transitions, 1029 flow [2024-06-27 19:31:39,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1029, PETRI_PLACES=109, PETRI_TRANSITIONS=114} [2024-06-27 19:31:39,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-27 19:31:39,306 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 114 transitions, 1029 flow [2024-06-27 19:31:39,307 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) [2024-06-27 19:31:39,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:39,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:39,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:31:39,307 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)] === [2024-06-27 19:31:39,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:39,308 INFO L85 PathProgramCache]: Analyzing trace with hash 656269619, now seen corresponding path program 3 times [2024-06-27 19:31:39,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:39,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734516414] [2024-06-27 19:31:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:39,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:39,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:39,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734516414] [2024-06-27 19:31:39,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734516414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:39,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:39,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:39,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699946038] [2024-06-27 19:31:39,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:39,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:39,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:39,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:39,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:39,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 114 transitions, 1029 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) [2024-06-27 19:31:39,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:39,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:39,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:39,684 INFO L124 PetriNetUnfolderBase]: 1054/1751 cut-off events. [2024-06-27 19:31:39,685 INFO L125 PetriNetUnfolderBase]: For 26155/26161 co-relation queries the response was YES. [2024-06-27 19:31:39,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8918 conditions, 1751 events. 1054/1751 cut-off events. For 26155/26161 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9153 event pairs, 286 based on Foata normal form. 8/1752 useless extension candidates. Maximal degree in co-relation 8866. Up to 1425 conditions per place. [2024-06-27 19:31:39,702 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 103 selfloop transitions, 26 changer transitions 0/137 dead transitions. [2024-06-27 19:31:39,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 137 transitions, 1363 flow [2024-06-27 19:31:39,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:39,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:31:39,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:31:39,704 INFO L175 Difference]: Start difference. First operand has 109 places, 114 transitions, 1029 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:31:39,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 137 transitions, 1363 flow [2024-06-27 19:31:39,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 137 transitions, 1310 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:39,743 INFO L231 Difference]: Finished difference. Result has 111 places, 116 transitions, 1063 flow [2024-06-27 19:31:39,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1063, PETRI_PLACES=111, PETRI_TRANSITIONS=116} [2024-06-27 19:31:39,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-27 19:31:39,744 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 116 transitions, 1063 flow [2024-06-27 19:31:39,744 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) [2024-06-27 19:31:39,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:39,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:39,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:31:39,744 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:39,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1358205659, now seen corresponding path program 1 times [2024-06-27 19:31:39,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:39,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023010271] [2024-06-27 19:31:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:39,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:39,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:39,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023010271] [2024-06-27 19:31:39,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023010271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:39,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:39,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:39,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63496316] [2024-06-27 19:31:39,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:39,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:39,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:39,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:39,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:39,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:31:39,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 116 transitions, 1063 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:39,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:39,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:31:39,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:40,278 INFO L124 PetriNetUnfolderBase]: 1055/1777 cut-off events. [2024-06-27 19:31:40,278 INFO L125 PetriNetUnfolderBase]: For 31339/31373 co-relation queries the response was YES. [2024-06-27 19:31:40,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9407 conditions, 1777 events. 1055/1777 cut-off events. For 31339/31373 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9483 event pairs, 183 based on Foata normal form. 10/1730 useless extension candidates. Maximal degree in co-relation 9354. Up to 1341 conditions per place. [2024-06-27 19:31:40,296 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 89 selfloop transitions, 40 changer transitions 0/157 dead transitions. [2024-06-27 19:31:40,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 157 transitions, 1525 flow [2024-06-27 19:31:40,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:31:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:31:40,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 19:31:40,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432926829268293 [2024-06-27 19:31:40,299 INFO L175 Difference]: Start difference. First operand has 111 places, 116 transitions, 1063 flow. Second operand 8 states and 211 transitions. [2024-06-27 19:31:40,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 157 transitions, 1525 flow [2024-06-27 19:31:40,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 157 transitions, 1456 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:40,347 INFO L231 Difference]: Finished difference. Result has 115 places, 120 transitions, 1117 flow [2024-06-27 19:31:40,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1117, PETRI_PLACES=115, PETRI_TRANSITIONS=120} [2024-06-27 19:31:40,348 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-27 19:31:40,348 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 120 transitions, 1117 flow [2024-06-27 19:31:40,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:40,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:40,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:40,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:31:40,349 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:40,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:40,349 INFO L85 PathProgramCache]: Analyzing trace with hash 577333285, now seen corresponding path program 2 times [2024-06-27 19:31:40,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:40,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884855408] [2024-06-27 19:31:40,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:40,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:40,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:40,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884855408] [2024-06-27 19:31:40,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884855408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:40,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:40,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:40,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654622929] [2024-06-27 19:31:40,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:40,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:40,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:40,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:40,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:40,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:31:40,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 120 transitions, 1117 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:40,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:40,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:31:40,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:40,808 INFO L124 PetriNetUnfolderBase]: 1043/1757 cut-off events. [2024-06-27 19:31:40,808 INFO L125 PetriNetUnfolderBase]: For 33070/33105 co-relation queries the response was YES. [2024-06-27 19:31:40,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9480 conditions, 1757 events. 1043/1757 cut-off events. For 33070/33105 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9405 event pairs, 250 based on Foata normal form. 8/1707 useless extension candidates. Maximal degree in co-relation 9426. Up to 1409 conditions per place. [2024-06-27 19:31:40,827 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 87 selfloop transitions, 35 changer transitions 0/150 dead transitions. [2024-06-27 19:31:40,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 150 transitions, 1437 flow [2024-06-27 19:31:40,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:40,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-27 19:31:40,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-27 19:31:40,829 INFO L175 Difference]: Start difference. First operand has 115 places, 120 transitions, 1117 flow. Second operand 7 states and 185 transitions. [2024-06-27 19:31:40,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 150 transitions, 1437 flow [2024-06-27 19:31:40,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 150 transitions, 1374 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:40,874 INFO L231 Difference]: Finished difference. Result has 118 places, 120 transitions, 1132 flow [2024-06-27 19:31:40,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1132, PETRI_PLACES=118, PETRI_TRANSITIONS=120} [2024-06-27 19:31:40,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-27 19:31:40,875 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 120 transitions, 1132 flow [2024-06-27 19:31:40,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:40,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:40,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:40,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:31:40,876 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:40,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:40,876 INFO L85 PathProgramCache]: Analyzing trace with hash 81360923, now seen corresponding path program 3 times [2024-06-27 19:31:40,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:40,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208518619] [2024-06-27 19:31:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:40,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:40,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:40,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208518619] [2024-06-27 19:31:40,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208518619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:40,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:40,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:40,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057798335] [2024-06-27 19:31:40,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:40,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:40,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:40,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:40,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:41,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:31:41,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 120 transitions, 1132 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:41,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:41,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:31:41,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:41,255 INFO L124 PetriNetUnfolderBase]: 1035/1729 cut-off events. [2024-06-27 19:31:41,255 INFO L125 PetriNetUnfolderBase]: For 34703/34732 co-relation queries the response was YES. [2024-06-27 19:31:41,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9469 conditions, 1729 events. 1035/1729 cut-off events. For 34703/34732 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9234 event pairs, 255 based on Foata normal form. 6/1667 useless extension candidates. Maximal degree in co-relation 9413. Up to 1397 conditions per place. [2024-06-27 19:31:41,274 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 79 selfloop transitions, 35 changer transitions 0/142 dead transitions. [2024-06-27 19:31:41,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 142 transitions, 1430 flow [2024-06-27 19:31:41,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 19:31:41,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:31:41,276 INFO L175 Difference]: Start difference. First operand has 118 places, 120 transitions, 1132 flow. Second operand 6 states and 156 transitions. [2024-06-27 19:31:41,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 142 transitions, 1430 flow [2024-06-27 19:31:41,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 142 transitions, 1351 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:31:41,326 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 1155 flow [2024-06-27 19:31:41,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1155, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2024-06-27 19:31:41,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-27 19:31:41,326 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 1155 flow [2024-06-27 19:31:41,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:41,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:41,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:41,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:31:41,327 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)] === [2024-06-27 19:31:41,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:41,328 INFO L85 PathProgramCache]: Analyzing trace with hash 643570273, now seen corresponding path program 1 times [2024-06-27 19:31:41,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:41,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202633346] [2024-06-27 19:31:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:41,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:41,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:41,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202633346] [2024-06-27 19:31:41,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202633346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:41,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:41,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:41,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921929605] [2024-06-27 19:31:41,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:41,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:41,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:41,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:41,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:41,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:41,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 1155 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:41,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:41,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:41,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:41,717 INFO L124 PetriNetUnfolderBase]: 1119/1866 cut-off events. [2024-06-27 19:31:41,717 INFO L125 PetriNetUnfolderBase]: For 33990/33996 co-relation queries the response was YES. [2024-06-27 19:31:41,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10069 conditions, 1866 events. 1119/1866 cut-off events. For 33990/33996 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9873 event pairs, 280 based on Foata normal form. 6/1868 useless extension candidates. Maximal degree in co-relation 10012. Up to 1590 conditions per place. [2024-06-27 19:31:41,736 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 114 selfloop transitions, 34 changer transitions 0/156 dead transitions. [2024-06-27 19:31:41,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 156 transitions, 1756 flow [2024-06-27 19:31:41,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:31:41,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:31:41,738 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 1155 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:31:41,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 156 transitions, 1756 flow [2024-06-27 19:31:41,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 156 transitions, 1668 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:41,796 INFO L231 Difference]: Finished difference. Result has 122 places, 138 transitions, 1348 flow [2024-06-27 19:31:41,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1348, PETRI_PLACES=122, PETRI_TRANSITIONS=138} [2024-06-27 19:31:41,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-27 19:31:41,797 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 138 transitions, 1348 flow [2024-06-27 19:31:41,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:41,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:41,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:41,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:31:41,797 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)] === [2024-06-27 19:31:41,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:41,798 INFO L85 PathProgramCache]: Analyzing trace with hash 208208865, now seen corresponding path program 2 times [2024-06-27 19:31:41,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:41,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885448279] [2024-06-27 19:31:41,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:41,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:41,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:41,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885448279] [2024-06-27 19:31:41,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885448279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:41,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:41,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:41,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458709002] [2024-06-27 19:31:41,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:41,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:41,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:41,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:41,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:41,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:41,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 138 transitions, 1348 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:41,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:41,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:41,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:42,184 INFO L124 PetriNetUnfolderBase]: 1129/1884 cut-off events. [2024-06-27 19:31:42,184 INFO L125 PetriNetUnfolderBase]: For 36944/36950 co-relation queries the response was YES. [2024-06-27 19:31:42,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10505 conditions, 1884 events. 1129/1884 cut-off events. For 36944/36950 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10010 event pairs, 280 based on Foata normal form. 6/1886 useless extension candidates. Maximal degree in co-relation 10445. Up to 1600 conditions per place. [2024-06-27 19:31:42,207 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 113 selfloop transitions, 38 changer transitions 0/159 dead transitions. [2024-06-27 19:31:42,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 159 transitions, 1837 flow [2024-06-27 19:31:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:31:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:31:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-27 19:31:42,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-27 19:31:42,209 INFO L175 Difference]: Start difference. First operand has 122 places, 138 transitions, 1348 flow. Second operand 5 states and 133 transitions. [2024-06-27 19:31:42,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 159 transitions, 1837 flow [2024-06-27 19:31:42,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 159 transitions, 1797 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-06-27 19:31:42,307 INFO L231 Difference]: Finished difference. Result has 127 places, 142 transitions, 1445 flow [2024-06-27 19:31:42,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1445, PETRI_PLACES=127, PETRI_TRANSITIONS=142} [2024-06-27 19:31:42,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-27 19:31:42,308 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 142 transitions, 1445 flow [2024-06-27 19:31:42,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:42,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:42,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:42,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:31:42,308 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)] === [2024-06-27 19:31:42,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:42,309 INFO L85 PathProgramCache]: Analyzing trace with hash 208654335, now seen corresponding path program 3 times [2024-06-27 19:31:42,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:42,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710826210] [2024-06-27 19:31:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:42,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:42,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:42,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710826210] [2024-06-27 19:31:42,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710826210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:42,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:42,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:42,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702116681] [2024-06-27 19:31:42,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:42,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:42,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:42,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:42,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:42,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:42,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 142 transitions, 1445 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:42,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:42,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:42,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:42,763 INFO L124 PetriNetUnfolderBase]: 1149/1913 cut-off events. [2024-06-27 19:31:42,763 INFO L125 PetriNetUnfolderBase]: For 39567/39567 co-relation queries the response was YES. [2024-06-27 19:31:42,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10916 conditions, 1913 events. 1149/1913 cut-off events. For 39567/39567 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10095 event pairs, 271 based on Foata normal form. 2/1913 useless extension candidates. Maximal degree in co-relation 10853. Up to 1651 conditions per place. [2024-06-27 19:31:42,786 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 126 selfloop transitions, 34 changer transitions 0/168 dead transitions. [2024-06-27 19:31:42,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 168 transitions, 1965 flow [2024-06-27 19:31:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:31:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:31:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-27 19:31:42,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-27 19:31:42,788 INFO L175 Difference]: Start difference. First operand has 127 places, 142 transitions, 1445 flow. Second operand 5 states and 135 transitions. [2024-06-27 19:31:42,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 168 transitions, 1965 flow [2024-06-27 19:31:42,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 168 transitions, 1869 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 19:31:42,864 INFO L231 Difference]: Finished difference. Result has 130 places, 149 transitions, 1576 flow [2024-06-27 19:31:42,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1576, PETRI_PLACES=130, PETRI_TRANSITIONS=149} [2024-06-27 19:31:42,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-27 19:31:42,865 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 149 transitions, 1576 flow [2024-06-27 19:31:42,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:42,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:42,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:42,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:31:42,866 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)] === [2024-06-27 19:31:42,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:42,866 INFO L85 PathProgramCache]: Analyzing trace with hash 8050793, now seen corresponding path program 1 times [2024-06-27 19:31:42,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:42,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856342789] [2024-06-27 19:31:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:42,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:42,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:42,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856342789] [2024-06-27 19:31:42,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856342789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:42,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:42,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:42,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487331193] [2024-06-27 19:31:42,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:42,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:42,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:42,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:42,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:42,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:42,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 149 transitions, 1576 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:42,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:42,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:42,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:43,273 INFO L124 PetriNetUnfolderBase]: 1167/1943 cut-off events. [2024-06-27 19:31:43,273 INFO L125 PetriNetUnfolderBase]: For 41823/41823 co-relation queries the response was YES. [2024-06-27 19:31:43,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11165 conditions, 1943 events. 1167/1943 cut-off events. For 41823/41823 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10331 event pairs, 292 based on Foata normal form. 2/1938 useless extension candidates. Maximal degree in co-relation 11101. Up to 1629 conditions per place. [2024-06-27 19:31:43,294 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 132 selfloop transitions, 38 changer transitions 0/178 dead transitions. [2024-06-27 19:31:43,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 178 transitions, 2182 flow [2024-06-27 19:31:43,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:43,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:31:43,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:31:43,295 INFO L175 Difference]: Start difference. First operand has 130 places, 149 transitions, 1576 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:31:43,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 178 transitions, 2182 flow [2024-06-27 19:31:43,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 178 transitions, 2133 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 19:31:43,369 INFO L231 Difference]: Finished difference. Result has 134 places, 160 transitions, 1740 flow [2024-06-27 19:31:43,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1740, PETRI_PLACES=134, PETRI_TRANSITIONS=160} [2024-06-27 19:31:43,370 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-27 19:31:43,370 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 160 transitions, 1740 flow [2024-06-27 19:31:43,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:43,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:43,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:43,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:31:43,371 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)] === [2024-06-27 19:31:43,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:43,371 INFO L85 PathProgramCache]: Analyzing trace with hash 397412073, now seen corresponding path program 2 times [2024-06-27 19:31:43,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:43,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89373929] [2024-06-27 19:31:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:43,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:43,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:43,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89373929] [2024-06-27 19:31:43,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89373929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:43,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:43,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:43,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912850590] [2024-06-27 19:31:43,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:43,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:43,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:43,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:43,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:43,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:43,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 160 transitions, 1740 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:43,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:43,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:43,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:43,772 INFO L124 PetriNetUnfolderBase]: 1187/1978 cut-off events. [2024-06-27 19:31:43,772 INFO L125 PetriNetUnfolderBase]: For 45469/45469 co-relation queries the response was YES. [2024-06-27 19:31:43,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11740 conditions, 1978 events. 1187/1978 cut-off events. For 45469/45469 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10570 event pairs, 283 based on Foata normal form. 2/1974 useless extension candidates. Maximal degree in co-relation 11675. Up to 1712 conditions per place. [2024-06-27 19:31:43,793 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 142 selfloop transitions, 31 changer transitions 0/181 dead transitions. [2024-06-27 19:31:43,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 181 transitions, 2241 flow [2024-06-27 19:31:43,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:31:43,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-27 19:31:43,795 INFO L175 Difference]: Start difference. First operand has 134 places, 160 transitions, 1740 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:31:43,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 181 transitions, 2241 flow [2024-06-27 19:31:43,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 181 transitions, 2165 flow, removed 30 selfloop flow, removed 1 redundant places. [2024-06-27 19:31:43,891 INFO L231 Difference]: Finished difference. Result has 139 places, 168 transitions, 1864 flow [2024-06-27 19:31:43,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1864, PETRI_PLACES=139, PETRI_TRANSITIONS=168} [2024-06-27 19:31:43,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-27 19:31:43,892 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 168 transitions, 1864 flow [2024-06-27 19:31:43,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:43,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:43,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:43,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:31:43,893 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)] === [2024-06-27 19:31:43,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:43,893 INFO L85 PathProgramCache]: Analyzing trace with hash 397412259, now seen corresponding path program 1 times [2024-06-27 19:31:43,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:43,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130032208] [2024-06-27 19:31:43,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:43,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:43,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:43,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130032208] [2024-06-27 19:31:43,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130032208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:43,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:43,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:43,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320194374] [2024-06-27 19:31:43,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:43,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:43,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:43,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:43,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:44,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:44,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 168 transitions, 1864 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:44,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:44,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:44,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:44,288 INFO L124 PetriNetUnfolderBase]: 1197/1993 cut-off events. [2024-06-27 19:31:44,288 INFO L125 PetriNetUnfolderBase]: For 48890/48890 co-relation queries the response was YES. [2024-06-27 19:31:44,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11989 conditions, 1993 events. 1197/1993 cut-off events. For 48890/48890 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10633 event pairs, 288 based on Foata normal form. 2/1989 useless extension candidates. Maximal degree in co-relation 11921. Up to 1677 conditions per place. [2024-06-27 19:31:44,308 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 127 selfloop transitions, 52 changer transitions 0/187 dead transitions. [2024-06-27 19:31:44,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 187 transitions, 2427 flow [2024-06-27 19:31:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:31:44,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:31:44,309 INFO L175 Difference]: Start difference. First operand has 139 places, 168 transitions, 1864 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:31:44,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 187 transitions, 2427 flow [2024-06-27 19:31:44,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 187 transitions, 2342 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 19:31:44,444 INFO L231 Difference]: Finished difference. Result has 142 places, 172 transitions, 1951 flow [2024-06-27 19:31:44,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1779, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1951, PETRI_PLACES=142, PETRI_TRANSITIONS=172} [2024-06-27 19:31:44,445 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-27 19:31:44,445 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 172 transitions, 1951 flow [2024-06-27 19:31:44,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:44,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:44,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:44,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:31:44,446 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)] === [2024-06-27 19:31:44,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:44,446 INFO L85 PathProgramCache]: Analyzing trace with hash 208423943, now seen corresponding path program 3 times [2024-06-27 19:31:44,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:44,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869333364] [2024-06-27 19:31:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:44,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:44,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:44,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869333364] [2024-06-27 19:31:44,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869333364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:44,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:44,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:44,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103264658] [2024-06-27 19:31:44,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:44,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:44,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:44,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:44,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:44,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:44,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 172 transitions, 1951 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:44,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:44,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:44,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:44,891 INFO L124 PetriNetUnfolderBase]: 1199/2001 cut-off events. [2024-06-27 19:31:44,891 INFO L125 PetriNetUnfolderBase]: For 51206/51206 co-relation queries the response was YES. [2024-06-27 19:31:44,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12150 conditions, 2001 events. 1199/2001 cut-off events. For 51206/51206 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10695 event pairs, 280 based on Foata normal form. 2/1997 useless extension candidates. Maximal degree in co-relation 12081. Up to 1677 conditions per place. [2024-06-27 19:31:44,913 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 140 selfloop transitions, 47 changer transitions 0/195 dead transitions. [2024-06-27 19:31:44,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 195 transitions, 2471 flow [2024-06-27 19:31:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 19:31:44,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-27 19:31:44,915 INFO L175 Difference]: Start difference. First operand has 142 places, 172 transitions, 1951 flow. Second operand 6 states and 154 transitions. [2024-06-27 19:31:44,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 195 transitions, 2471 flow [2024-06-27 19:31:45,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 195 transitions, 2308 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:45,044 INFO L231 Difference]: Finished difference. Result has 145 places, 175 transitions, 1960 flow [2024-06-27 19:31:45,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1960, PETRI_PLACES=145, PETRI_TRANSITIONS=175} [2024-06-27 19:31:45,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-27 19:31:45,045 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 175 transitions, 1960 flow [2024-06-27 19:31:45,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:45,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:45,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:45,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:31:45,046 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)] === [2024-06-27 19:31:45,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:45,046 INFO L85 PathProgramCache]: Analyzing trace with hash 208424129, now seen corresponding path program 2 times [2024-06-27 19:31:45,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:45,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867906092] [2024-06-27 19:31:45,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:45,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:45,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:45,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867906092] [2024-06-27 19:31:45,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867906092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:45,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:45,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:45,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905775819] [2024-06-27 19:31:45,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:45,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:45,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:45,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:45,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:45,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:45,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 175 transitions, 1960 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:45,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:45,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:45,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:45,427 INFO L124 PetriNetUnfolderBase]: 1201/2003 cut-off events. [2024-06-27 19:31:45,428 INFO L125 PetriNetUnfolderBase]: For 53678/53678 co-relation queries the response was YES. [2024-06-27 19:31:45,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12266 conditions, 2003 events. 1201/2003 cut-off events. For 53678/53678 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10744 event pairs, 288 based on Foata normal form. 2/1999 useless extension candidates. Maximal degree in co-relation 12196. Up to 1684 conditions per place. [2024-06-27 19:31:45,445 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 129 selfloop transitions, 55 changer transitions 0/192 dead transitions. [2024-06-27 19:31:45,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 192 transitions, 2523 flow [2024-06-27 19:31:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:31:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:31:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-27 19:31:45,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:31:45,447 INFO L175 Difference]: Start difference. First operand has 145 places, 175 transitions, 1960 flow. Second operand 5 states and 130 transitions. [2024-06-27 19:31:45,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 192 transitions, 2523 flow [2024-06-27 19:31:45,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 192 transitions, 2428 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:45,561 INFO L231 Difference]: Finished difference. Result has 146 places, 178 transitions, 2036 flow [2024-06-27 19:31:45,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1869, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2036, PETRI_PLACES=146, PETRI_TRANSITIONS=178} [2024-06-27 19:31:45,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-27 19:31:45,562 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 178 transitions, 2036 flow [2024-06-27 19:31:45,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:45,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:45,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:45,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:31:45,563 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)] === [2024-06-27 19:31:45,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:45,564 INFO L85 PathProgramCache]: Analyzing trace with hash 208661279, now seen corresponding path program 3 times [2024-06-27 19:31:45,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:45,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506410641] [2024-06-27 19:31:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:45,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:45,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:45,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506410641] [2024-06-27 19:31:45,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506410641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:45,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:45,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:45,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173470486] [2024-06-27 19:31:45,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:45,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:45,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:45,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:45,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:45,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:45,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 178 transitions, 2036 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:45,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:45,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:45,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:46,049 INFO L124 PetriNetUnfolderBase]: 1193/2001 cut-off events. [2024-06-27 19:31:46,050 INFO L125 PetriNetUnfolderBase]: For 51395/51395 co-relation queries the response was YES. [2024-06-27 19:31:46,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12173 conditions, 2001 events. 1193/2001 cut-off events. For 51395/51395 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10740 event pairs, 266 based on Foata normal form. 2/2001 useless extension candidates. Maximal degree in co-relation 12102. Up to 1712 conditions per place. [2024-06-27 19:31:46,068 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 150 selfloop transitions, 38 changer transitions 0/196 dead transitions. [2024-06-27 19:31:46,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 196 transitions, 2458 flow [2024-06-27 19:31:46,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:31:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:31:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-27 19:31:46,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6536585365853659 [2024-06-27 19:31:46,070 INFO L175 Difference]: Start difference. First operand has 146 places, 178 transitions, 2036 flow. Second operand 5 states and 134 transitions. [2024-06-27 19:31:46,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 196 transitions, 2458 flow [2024-06-27 19:31:46,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 196 transitions, 2318 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 19:31:46,160 INFO L231 Difference]: Finished difference. Result has 148 places, 178 transitions, 1996 flow [2024-06-27 19:31:46,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1996, PETRI_PLACES=148, PETRI_TRANSITIONS=178} [2024-06-27 19:31:46,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-27 19:31:46,161 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 178 transitions, 1996 flow [2024-06-27 19:31:46,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:46,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:46,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:46,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:31:46,162 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)] === [2024-06-27 19:31:46,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:46,162 INFO L85 PathProgramCache]: Analyzing trace with hash 208670207, now seen corresponding path program 1 times [2024-06-27 19:31:46,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:46,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011826242] [2024-06-27 19:31:46,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:46,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:46,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:46,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011826242] [2024-06-27 19:31:46,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011826242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:46,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:46,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:31:46,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056100250] [2024-06-27 19:31:46,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:46,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:31:46,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:46,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:31:46,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:31:46,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:31:46,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 178 transitions, 1996 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) [2024-06-27 19:31:46,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:46,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:31:46,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:46,503 INFO L124 PetriNetUnfolderBase]: 1129/1935 cut-off events. [2024-06-27 19:31:46,503 INFO L125 PetriNetUnfolderBase]: For 50002/50002 co-relation queries the response was YES. [2024-06-27 19:31:46,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11647 conditions, 1935 events. 1129/1935 cut-off events. For 50002/50002 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10547 event pairs, 265 based on Foata normal form. 2/1935 useless extension candidates. Maximal degree in co-relation 11576. Up to 1588 conditions per place. [2024-06-27 19:31:46,518 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 144 selfloop transitions, 10 changer transitions 0/189 dead transitions. [2024-06-27 19:31:46,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 189 transitions, 2350 flow [2024-06-27 19:31:46,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:31:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:31:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-27 19:31:46,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-27 19:31:46,519 INFO L175 Difference]: Start difference. First operand has 148 places, 178 transitions, 1996 flow. Second operand 4 states and 103 transitions. [2024-06-27 19:31:46,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 189 transitions, 2350 flow [2024-06-27 19:31:46,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 189 transitions, 2274 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:46,598 INFO L231 Difference]: Finished difference. Result has 148 places, 180 transitions, 1973 flow [2024-06-27 19:31:46,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1920, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1973, PETRI_PLACES=148, PETRI_TRANSITIONS=180} [2024-06-27 19:31:46,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-27 19:31:46,599 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 180 transitions, 1973 flow [2024-06-27 19:31:46,599 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) [2024-06-27 19:31:46,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:46,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:46,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:31:46,600 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:46,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:46,601 INFO L85 PathProgramCache]: Analyzing trace with hash 668824790, now seen corresponding path program 1 times [2024-06-27 19:31:46,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:46,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531591381] [2024-06-27 19:31:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:46,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:46,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:46,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531591381] [2024-06-27 19:31:46,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531591381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:46,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:46,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:31:46,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013091297] [2024-06-27 19:31:46,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:46,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:31:46,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:46,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:31:46,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:31:46,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:46,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 180 transitions, 1973 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:46,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:46,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:46,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:47,237 INFO L124 PetriNetUnfolderBase]: 1315/2217 cut-off events. [2024-06-27 19:31:47,237 INFO L125 PetriNetUnfolderBase]: For 64934/64940 co-relation queries the response was YES. [2024-06-27 19:31:47,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13301 conditions, 2217 events. 1315/2217 cut-off events. For 64934/64940 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12290 event pairs, 224 based on Foata normal form. 12/2223 useless extension candidates. Maximal degree in co-relation 13229. Up to 1496 conditions per place. [2024-06-27 19:31:47,264 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 47 changer transitions 0/234 dead transitions. [2024-06-27 19:31:47,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 234 transitions, 2724 flow [2024-06-27 19:31:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:31:47,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:31:47,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 19:31:47,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:31:47,266 INFO L175 Difference]: Start difference. First operand has 148 places, 180 transitions, 1973 flow. Second operand 9 states and 234 transitions. [2024-06-27 19:31:47,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 234 transitions, 2724 flow [2024-06-27 19:31:47,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 234 transitions, 2687 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 19:31:47,370 INFO L231 Difference]: Finished difference. Result has 157 places, 185 transitions, 2110 flow [2024-06-27 19:31:47,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2110, PETRI_PLACES=157, PETRI_TRANSITIONS=185} [2024-06-27 19:31:47,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-27 19:31:47,371 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 185 transitions, 2110 flow [2024-06-27 19:31:47,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:47,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:47,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:47,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:31:47,372 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:47,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:47,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1550537272, now seen corresponding path program 2 times [2024-06-27 19:31:47,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:47,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184189172] [2024-06-27 19:31:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:47,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:47,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:47,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184189172] [2024-06-27 19:31:47,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184189172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:47,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:47,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:31:47,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421587383] [2024-06-27 19:31:47,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:47,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:31:47,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:47,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:31:47,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:31:47,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:47,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 185 transitions, 2110 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:47,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:47,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:47,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:47,915 INFO L124 PetriNetUnfolderBase]: 1373/2325 cut-off events. [2024-06-27 19:31:47,915 INFO L125 PetriNetUnfolderBase]: For 71154/71160 co-relation queries the response was YES. [2024-06-27 19:31:47,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14125 conditions, 2325 events. 1373/2325 cut-off events. For 71154/71160 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13120 event pairs, 329 based on Foata normal form. 16/2335 useless extension candidates. Maximal degree in co-relation 14050. Up to 1838 conditions per place. [2024-06-27 19:31:47,933 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 171 selfloop transitions, 44 changer transitions 0/223 dead transitions. [2024-06-27 19:31:47,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 223 transitions, 2659 flow [2024-06-27 19:31:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:31:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:31:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:31:47,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-27 19:31:47,934 INFO L175 Difference]: Start difference. First operand has 157 places, 185 transitions, 2110 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:31:47,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 223 transitions, 2659 flow [2024-06-27 19:31:48,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 223 transitions, 2589 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:48,040 INFO L231 Difference]: Finished difference. Result has 161 places, 186 transitions, 2154 flow [2024-06-27 19:31:48,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2040, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2154, PETRI_PLACES=161, PETRI_TRANSITIONS=186} [2024-06-27 19:31:48,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-27 19:31:48,041 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 186 transitions, 2154 flow [2024-06-27 19:31:48,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:48,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:48,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:48,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:31:48,042 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:48,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:48,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1550389402, now seen corresponding path program 3 times [2024-06-27 19:31:48,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:48,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436132183] [2024-06-27 19:31:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:48,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:48,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:48,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:48,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436132183] [2024-06-27 19:31:48,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436132183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:48,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:48,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:31:48,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177394223] [2024-06-27 19:31:48,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:48,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:31:48,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:48,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:31:48,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:31:48,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:48,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 186 transitions, 2154 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:48,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:48,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:48,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:48,618 INFO L124 PetriNetUnfolderBase]: 1414/2406 cut-off events. [2024-06-27 19:31:48,618 INFO L125 PetriNetUnfolderBase]: For 74566/74572 co-relation queries the response was YES. [2024-06-27 19:31:48,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14689 conditions, 2406 events. 1414/2406 cut-off events. For 74566/74572 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13766 event pairs, 327 based on Foata normal form. 12/2412 useless extension candidates. Maximal degree in co-relation 14612. Up to 1822 conditions per place. [2024-06-27 19:31:48,636 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 46 changer transitions 0/229 dead transitions. [2024-06-27 19:31:48,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 229 transitions, 2753 flow [2024-06-27 19:31:48,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:31:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:31:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 19:31:48,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-27 19:31:48,637 INFO L175 Difference]: Start difference. First operand has 161 places, 186 transitions, 2154 flow. Second operand 8 states and 209 transitions. [2024-06-27 19:31:48,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 229 transitions, 2753 flow [2024-06-27 19:31:48,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 229 transitions, 2660 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:31:48,741 INFO L231 Difference]: Finished difference. Result has 164 places, 189 transitions, 2212 flow [2024-06-27 19:31:48,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2212, PETRI_PLACES=164, PETRI_TRANSITIONS=189} [2024-06-27 19:31:48,742 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-27 19:31:48,742 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 189 transitions, 2212 flow [2024-06-27 19:31:48,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:48,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:48,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:48,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:31:48,743 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:48,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:48,743 INFO L85 PathProgramCache]: Analyzing trace with hash -35909038, now seen corresponding path program 4 times [2024-06-27 19:31:48,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:48,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143279573] [2024-06-27 19:31:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:48,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:48,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:48,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143279573] [2024-06-27 19:31:48,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143279573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:48,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:48,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:48,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865324935] [2024-06-27 19:31:48,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:48,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:48,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:48,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:48,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:48,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:48,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 189 transitions, 2212 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) [2024-06-27 19:31:48,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:48,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:48,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:49,230 INFO L124 PetriNetUnfolderBase]: 1472/2482 cut-off events. [2024-06-27 19:31:49,230 INFO L125 PetriNetUnfolderBase]: For 81643/81643 co-relation queries the response was YES. [2024-06-27 19:31:49,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15206 conditions, 2482 events. 1472/2482 cut-off events. For 81643/81643 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14320 event pairs, 370 based on Foata normal form. 16/2484 useless extension candidates. Maximal degree in co-relation 15127. Up to 2007 conditions per place. [2024-06-27 19:31:49,256 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 44 changer transitions 0/217 dead transitions. [2024-06-27 19:31:49,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 217 transitions, 2722 flow [2024-06-27 19:31:49,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:49,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:31:49,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:31:49,257 INFO L175 Difference]: Start difference. First operand has 164 places, 189 transitions, 2212 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:31:49,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 217 transitions, 2722 flow [2024-06-27 19:31:49,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 217 transitions, 2654 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:49,390 INFO L231 Difference]: Finished difference. Result has 167 places, 190 transitions, 2257 flow [2024-06-27 19:31:49,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2257, PETRI_PLACES=167, PETRI_TRANSITIONS=190} [2024-06-27 19:31:49,390 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-27 19:31:49,390 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 190 transitions, 2257 flow [2024-06-27 19:31:49,391 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) [2024-06-27 19:31:49,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:49,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:49,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:31:49,391 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:49,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:49,391 INFO L85 PathProgramCache]: Analyzing trace with hash -724088216, now seen corresponding path program 5 times [2024-06-27 19:31:49,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:49,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502342711] [2024-06-27 19:31:49,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:49,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:49,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:49,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502342711] [2024-06-27 19:31:49,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502342711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:49,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:49,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:49,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104025861] [2024-06-27 19:31:49,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:49,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:49,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:49,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:49,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 190 transitions, 2257 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) [2024-06-27 19:31:49,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:49,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:49,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:49,912 INFO L124 PetriNetUnfolderBase]: 1530/2590 cut-off events. [2024-06-27 19:31:49,912 INFO L125 PetriNetUnfolderBase]: For 85886/85886 co-relation queries the response was YES. [2024-06-27 19:31:49,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15850 conditions, 2590 events. 1530/2590 cut-off events. For 85886/85886 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15116 event pairs, 385 based on Foata normal form. 16/2592 useless extension candidates. Maximal degree in co-relation 15769. Up to 2105 conditions per place. [2024-06-27 19:31:49,933 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 43 changer transitions 0/218 dead transitions. [2024-06-27 19:31:49,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 218 transitions, 2771 flow [2024-06-27 19:31:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:49,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:31:49,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:31:49,934 INFO L175 Difference]: Start difference. First operand has 167 places, 190 transitions, 2257 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:31:49,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 218 transitions, 2771 flow [2024-06-27 19:31:50,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 218 transitions, 2676 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:31:50,077 INFO L231 Difference]: Finished difference. Result has 169 places, 191 transitions, 2275 flow [2024-06-27 19:31:50,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2162, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2275, PETRI_PLACES=169, PETRI_TRANSITIONS=191} [2024-06-27 19:31:50,077 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-27 19:31:50,077 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 191 transitions, 2275 flow [2024-06-27 19:31:50,078 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) [2024-06-27 19:31:50,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:50,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:50,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:31:50,078 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:50,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:50,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1417226854, now seen corresponding path program 6 times [2024-06-27 19:31:50,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:50,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683851011] [2024-06-27 19:31:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:50,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:50,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:50,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683851011] [2024-06-27 19:31:50,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683851011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:50,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:50,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:50,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579348721] [2024-06-27 19:31:50,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:50,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:50,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:50,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:50,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:50,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:50,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 191 transitions, 2275 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) [2024-06-27 19:31:50,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:50,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:50,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:50,606 INFO L124 PetriNetUnfolderBase]: 1546/2622 cut-off events. [2024-06-27 19:31:50,606 INFO L125 PetriNetUnfolderBase]: For 86505/86505 co-relation queries the response was YES. [2024-06-27 19:31:50,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15921 conditions, 2622 events. 1546/2622 cut-off events. For 86505/86505 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15379 event pairs, 376 based on Foata normal form. 12/2620 useless extension candidates. Maximal degree in co-relation 15839. Up to 1958 conditions per place. [2024-06-27 19:31:50,623 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 46 changer transitions 0/224 dead transitions. [2024-06-27 19:31:50,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 224 transitions, 2839 flow [2024-06-27 19:31:50,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:50,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:31:50,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-27 19:31:50,625 INFO L175 Difference]: Start difference. First operand has 169 places, 191 transitions, 2275 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:31:50,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 224 transitions, 2839 flow [2024-06-27 19:31:50,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 224 transitions, 2744 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:31:50,764 INFO L231 Difference]: Finished difference. Result has 172 places, 194 transitions, 2335 flow [2024-06-27 19:31:50,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2180, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2335, PETRI_PLACES=172, PETRI_TRANSITIONS=194} [2024-06-27 19:31:50,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-27 19:31:50,764 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 194 transitions, 2335 flow [2024-06-27 19:31:50,764 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) [2024-06-27 19:31:50,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:50,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:50,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:31:50,765 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:50,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:50,765 INFO L85 PathProgramCache]: Analyzing trace with hash -517161914, now seen corresponding path program 1 times [2024-06-27 19:31:50,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:50,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248125966] [2024-06-27 19:31:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:50,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:50,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:50,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248125966] [2024-06-27 19:31:50,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248125966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:50,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:50,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:50,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101142436] [2024-06-27 19:31:50,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:50,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:50,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:50,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:50,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:50,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:50,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 194 transitions, 2335 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) [2024-06-27 19:31:50,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:50,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:50,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:51,317 INFO L124 PetriNetUnfolderBase]: 1587/2703 cut-off events. [2024-06-27 19:31:51,317 INFO L125 PetriNetUnfolderBase]: For 91475/91475 co-relation queries the response was YES. [2024-06-27 19:31:51,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16372 conditions, 2703 events. 1587/2703 cut-off events. For 91475/91475 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 16075 event pairs, 352 based on Foata normal form. 12/2701 useless extension candidates. Maximal degree in co-relation 16288. Up to 1919 conditions per place. [2024-06-27 19:31:51,338 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 168 selfloop transitions, 49 changer transitions 0/225 dead transitions. [2024-06-27 19:31:51,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 225 transitions, 2877 flow [2024-06-27 19:31:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:31:51,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-27 19:31:51,340 INFO L175 Difference]: Start difference. First operand has 172 places, 194 transitions, 2335 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:31:51,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 225 transitions, 2877 flow [2024-06-27 19:31:51,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 225 transitions, 2805 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 19:31:51,485 INFO L231 Difference]: Finished difference. Result has 176 places, 195 transitions, 2391 flow [2024-06-27 19:31:51,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2391, PETRI_PLACES=176, PETRI_TRANSITIONS=195} [2024-06-27 19:31:51,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-27 19:31:51,486 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 195 transitions, 2391 flow [2024-06-27 19:31:51,486 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) [2024-06-27 19:31:51,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:51,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:51,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:31:51,486 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:51,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:51,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1159342476, now seen corresponding path program 7 times [2024-06-27 19:31:51,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:51,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712665600] [2024-06-27 19:31:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:51,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:51,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:51,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712665600] [2024-06-27 19:31:51,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712665600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:51,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:51,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:51,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526501255] [2024-06-27 19:31:51,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:51,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:51,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:51,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:51,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:51,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:51,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 195 transitions, 2391 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) [2024-06-27 19:31:51,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:51,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:51,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:52,023 INFO L124 PetriNetUnfolderBase]: 1628/2797 cut-off events. [2024-06-27 19:31:52,023 INFO L125 PetriNetUnfolderBase]: For 95950/95956 co-relation queries the response was YES. [2024-06-27 19:31:52,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16980 conditions, 2797 events. 1628/2797 cut-off events. For 95950/95956 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16752 event pairs, 317 based on Foata normal form. 12/2802 useless extension candidates. Maximal degree in co-relation 16894. Up to 2106 conditions per place. [2024-06-27 19:31:52,047 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 181 selfloop transitions, 46 changer transitions 0/235 dead transitions. [2024-06-27 19:31:52,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 235 transitions, 3113 flow [2024-06-27 19:31:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:52,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:52,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 19:31:52,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-27 19:31:52,049 INFO L175 Difference]: Start difference. First operand has 176 places, 195 transitions, 2391 flow. Second operand 7 states and 189 transitions. [2024-06-27 19:31:52,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 235 transitions, 3113 flow [2024-06-27 19:31:52,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 235 transitions, 2999 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:31:52,219 INFO L231 Difference]: Finished difference. Result has 179 places, 197 transitions, 2413 flow [2024-06-27 19:31:52,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2277, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2413, PETRI_PLACES=179, PETRI_TRANSITIONS=197} [2024-06-27 19:31:52,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-27 19:31:52,220 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 197 transitions, 2413 flow [2024-06-27 19:31:52,220 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) [2024-06-27 19:31:52,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:52,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:52,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:31:52,220 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:52,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:52,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1157110592, now seen corresponding path program 8 times [2024-06-27 19:31:52,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:52,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498275064] [2024-06-27 19:31:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:52,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:52,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:52,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498275064] [2024-06-27 19:31:52,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498275064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:52,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:52,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:52,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016800166] [2024-06-27 19:31:52,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:52,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:52,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:52,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:52,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:52,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:52,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 197 transitions, 2413 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) [2024-06-27 19:31:52,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:52,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:52,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:52,825 INFO L124 PetriNetUnfolderBase]: 1686/2895 cut-off events. [2024-06-27 19:31:52,825 INFO L125 PetriNetUnfolderBase]: For 103511/103517 co-relation queries the response was YES. [2024-06-27 19:31:52,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17502 conditions, 2895 events. 1686/2895 cut-off events. For 103511/103517 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 17508 event pairs, 422 based on Foata normal form. 16/2904 useless extension candidates. Maximal degree in co-relation 17414. Up to 2377 conditions per place. [2024-06-27 19:31:52,845 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 44 changer transitions 0/231 dead transitions. [2024-06-27 19:31:52,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 231 transitions, 2975 flow [2024-06-27 19:31:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:52,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:31:52,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-27 19:31:52,846 INFO L175 Difference]: Start difference. First operand has 179 places, 197 transitions, 2413 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:31:52,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 231 transitions, 2975 flow [2024-06-27 19:31:53,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 231 transitions, 2827 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:31:53,032 INFO L231 Difference]: Finished difference. Result has 180 places, 198 transitions, 2386 flow [2024-06-27 19:31:53,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2386, PETRI_PLACES=180, PETRI_TRANSITIONS=198} [2024-06-27 19:31:53,032 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-27 19:31:53,032 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 198 transitions, 2386 flow [2024-06-27 19:31:53,040 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) [2024-06-27 19:31:53,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:53,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:53,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:31:53,041 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:53,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:53,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1254556526, now seen corresponding path program 9 times [2024-06-27 19:31:53,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:53,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106225502] [2024-06-27 19:31:53,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:53,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:53,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:53,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106225502] [2024-06-27 19:31:53,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106225502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:53,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:53,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:53,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015675127] [2024-06-27 19:31:53,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:53,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:53,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:53,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:53,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:53,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:53,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 198 transitions, 2386 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) [2024-06-27 19:31:53,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:53,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:53,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:53,575 INFO L124 PetriNetUnfolderBase]: 1744/2983 cut-off events. [2024-06-27 19:31:53,575 INFO L125 PetriNetUnfolderBase]: For 109283/109289 co-relation queries the response was YES. [2024-06-27 19:31:53,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17750 conditions, 2983 events. 1744/2983 cut-off events. For 109283/109289 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18221 event pairs, 434 based on Foata normal form. 20/2992 useless extension candidates. Maximal degree in co-relation 17662. Up to 2475 conditions per place. [2024-06-27 19:31:53,600 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 176 selfloop transitions, 42 changer transitions 0/226 dead transitions. [2024-06-27 19:31:53,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 226 transitions, 2920 flow [2024-06-27 19:31:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:53,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:31:53,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:31:53,602 INFO L175 Difference]: Start difference. First operand has 180 places, 198 transitions, 2386 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:31:53,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 226 transitions, 2920 flow [2024-06-27 19:31:53,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 226 transitions, 2825 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:31:53,814 INFO L231 Difference]: Finished difference. Result has 182 places, 199 transitions, 2406 flow [2024-06-27 19:31:53,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2406, PETRI_PLACES=182, PETRI_TRANSITIONS=199} [2024-06-27 19:31:53,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-27 19:31:53,815 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 199 transitions, 2406 flow [2024-06-27 19:31:53,815 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) [2024-06-27 19:31:53,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:53,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:53,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:31:53,815 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:53,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:53,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1356556532, now seen corresponding path program 10 times [2024-06-27 19:31:53,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:53,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650744238] [2024-06-27 19:31:53,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:53,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:53,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:53,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650744238] [2024-06-27 19:31:53,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650744238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:53,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:53,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:53,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996056995] [2024-06-27 19:31:53,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:53,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:53,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:53,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:53,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:53,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:53,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 199 transitions, 2406 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) [2024-06-27 19:31:53,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:53,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:53,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:54,333 INFO L124 PetriNetUnfolderBase]: 1716/2949 cut-off events. [2024-06-27 19:31:54,333 INFO L125 PetriNetUnfolderBase]: For 101906/101912 co-relation queries the response was YES. [2024-06-27 19:31:54,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17049 conditions, 2949 events. 1716/2949 cut-off events. For 101906/101912 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17918 event pairs, 416 based on Foata normal form. 16/2958 useless extension candidates. Maximal degree in co-relation 16960. Up to 2431 conditions per place. [2024-06-27 19:31:54,357 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 43 changer transitions 0/230 dead transitions. [2024-06-27 19:31:54,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 230 transitions, 2958 flow [2024-06-27 19:31:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:54,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:54,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:31:54,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-27 19:31:54,358 INFO L175 Difference]: Start difference. First operand has 182 places, 199 transitions, 2406 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:31:54,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 230 transitions, 2958 flow [2024-06-27 19:31:54,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 230 transitions, 2845 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:31:54,534 INFO L231 Difference]: Finished difference. Result has 184 places, 200 transitions, 2412 flow [2024-06-27 19:31:54,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2412, PETRI_PLACES=184, PETRI_TRANSITIONS=200} [2024-06-27 19:31:54,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-27 19:31:54,535 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 200 transitions, 2412 flow [2024-06-27 19:31:54,535 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) [2024-06-27 19:31:54,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:54,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:54,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:31:54,535 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:54,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:54,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1364181044, now seen corresponding path program 2 times [2024-06-27 19:31:54,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:54,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248380817] [2024-06-27 19:31:54,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:54,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:54,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:54,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248380817] [2024-06-27 19:31:54,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248380817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:54,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:54,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:54,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260817199] [2024-06-27 19:31:54,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:54,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:54,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:54,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:54,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:54,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:54,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 200 transitions, 2412 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) [2024-06-27 19:31:54,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:54,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:54,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:55,121 INFO L124 PetriNetUnfolderBase]: 1757/3030 cut-off events. [2024-06-27 19:31:55,121 INFO L125 PetriNetUnfolderBase]: For 102838/102844 co-relation queries the response was YES. [2024-06-27 19:31:55,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17285 conditions, 3030 events. 1757/3030 cut-off events. For 102838/102844 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 18624 event pairs, 416 based on Foata normal form. 12/3035 useless extension candidates. Maximal degree in co-relation 17195. Up to 2323 conditions per place. [2024-06-27 19:31:55,144 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 180 selfloop transitions, 46 changer transitions 0/234 dead transitions. [2024-06-27 19:31:55,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 234 transitions, 2982 flow [2024-06-27 19:31:55,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 19:31:55,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-27 19:31:55,145 INFO L175 Difference]: Start difference. First operand has 184 places, 200 transitions, 2412 flow. Second operand 7 states and 183 transitions. [2024-06-27 19:31:55,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 234 transitions, 2982 flow [2024-06-27 19:31:55,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 234 transitions, 2895 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:31:55,447 INFO L231 Difference]: Finished difference. Result has 186 places, 201 transitions, 2449 flow [2024-06-27 19:31:55,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2449, PETRI_PLACES=186, PETRI_TRANSITIONS=201} [2024-06-27 19:31:55,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-27 19:31:55,448 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 201 transitions, 2449 flow [2024-06-27 19:31:55,448 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) [2024-06-27 19:31:55,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:55,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:55,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:31:55,448 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:55,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:55,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1246932014, now seen corresponding path program 3 times [2024-06-27 19:31:55,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:55,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915019288] [2024-06-27 19:31:55,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:55,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:55,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:55,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915019288] [2024-06-27 19:31:55,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915019288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:55,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:55,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:55,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852769237] [2024-06-27 19:31:55,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:55,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:55,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:55,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:55,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:55,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:55,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 201 transitions, 2449 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) [2024-06-27 19:31:55,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:55,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:55,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:56,021 INFO L124 PetriNetUnfolderBase]: 1798/3096 cut-off events. [2024-06-27 19:31:56,021 INFO L125 PetriNetUnfolderBase]: For 109641/109647 co-relation queries the response was YES. [2024-06-27 19:31:56,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17742 conditions, 3096 events. 1798/3096 cut-off events. For 109641/109647 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19247 event pairs, 433 based on Foata normal form. 16/3101 useless extension candidates. Maximal degree in co-relation 17651. Up to 2486 conditions per place. [2024-06-27 19:31:56,057 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 44 changer transitions 0/232 dead transitions. [2024-06-27 19:31:56,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 232 transitions, 3009 flow [2024-06-27 19:31:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:56,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:31:56,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:31:56,058 INFO L175 Difference]: Start difference. First operand has 186 places, 201 transitions, 2449 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:31:56,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 232 transitions, 3009 flow [2024-06-27 19:31:56,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 232 transitions, 2899 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:31:56,244 INFO L231 Difference]: Finished difference. Result has 188 places, 202 transitions, 2461 flow [2024-06-27 19:31:56,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2339, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2461, PETRI_PLACES=188, PETRI_TRANSITIONS=202} [2024-06-27 19:31:56,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-27 19:31:56,245 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 202 transitions, 2461 flow [2024-06-27 19:31:56,245 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) [2024-06-27 19:31:56,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:56,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:56,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:31:56,245 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:56,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:56,246 INFO L85 PathProgramCache]: Analyzing trace with hash -685071406, now seen corresponding path program 4 times [2024-06-27 19:31:56,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:56,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468744228] [2024-06-27 19:31:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:56,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:56,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:56,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468744228] [2024-06-27 19:31:56,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468744228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:56,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:56,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:56,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212286099] [2024-06-27 19:31:56,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:56,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:56,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:56,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:56,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:56,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:56,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 202 transitions, 2461 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) [2024-06-27 19:31:56,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:56,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:56,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:56,911 INFO L124 PetriNetUnfolderBase]: 1778/3074 cut-off events. [2024-06-27 19:31:56,911 INFO L125 PetriNetUnfolderBase]: For 103777/103783 co-relation queries the response was YES. [2024-06-27 19:31:56,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17128 conditions, 3074 events. 1778/3074 cut-off events. For 103777/103783 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19080 event pairs, 378 based on Foata normal form. 16/3079 useless extension candidates. Maximal degree in co-relation 17036. Up to 1710 conditions per place. [2024-06-27 19:31:56,936 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 169 selfloop transitions, 55 changer transitions 0/232 dead transitions. [2024-06-27 19:31:56,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 232 transitions, 2923 flow [2024-06-27 19:31:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:56,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:31:56,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-27 19:31:56,937 INFO L175 Difference]: Start difference. First operand has 188 places, 202 transitions, 2461 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:31:56,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 232 transitions, 2923 flow [2024-06-27 19:31:57,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 232 transitions, 2797 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 19:31:57,135 INFO L231 Difference]: Finished difference. Result has 188 places, 201 transitions, 2375 flow [2024-06-27 19:31:57,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2375, PETRI_PLACES=188, PETRI_TRANSITIONS=201} [2024-06-27 19:31:57,136 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-27 19:31:57,136 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 201 transitions, 2375 flow [2024-06-27 19:31:57,136 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) [2024-06-27 19:31:57,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:57,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:57,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:31:57,137 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)] === [2024-06-27 19:31:57,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:57,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2016186254, now seen corresponding path program 1 times [2024-06-27 19:31:57,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:57,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604698371] [2024-06-27 19:31:57,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:57,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:57,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:57,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604698371] [2024-06-27 19:31:57,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604698371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:57,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:57,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:57,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963681861] [2024-06-27 19:31:57,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:57,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:57,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:57,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:57,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:57,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:57,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 201 transitions, 2375 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:57,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:57,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:57,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:57,615 INFO L124 PetriNetUnfolderBase]: 1796/3078 cut-off events. [2024-06-27 19:31:57,615 INFO L125 PetriNetUnfolderBase]: For 95710/95710 co-relation queries the response was YES. [2024-06-27 19:31:57,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17270 conditions, 3078 events. 1796/3078 cut-off events. For 95710/95710 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19042 event pairs, 430 based on Foata normal form. 2/3073 useless extension candidates. Maximal degree in co-relation 17178. Up to 2581 conditions per place. [2024-06-27 19:31:57,641 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 145 selfloop transitions, 79 changer transitions 0/232 dead transitions. [2024-06-27 19:31:57,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 232 transitions, 3253 flow [2024-06-27 19:31:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:31:57,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-27 19:31:57,642 INFO L175 Difference]: Start difference. First operand has 188 places, 201 transitions, 2375 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:31:57,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 232 transitions, 3253 flow [2024-06-27 19:31:57,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 232 transitions, 3054 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 19:31:57,879 INFO L231 Difference]: Finished difference. Result has 188 places, 212 transitions, 2473 flow [2024-06-27 19:31:57,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2473, PETRI_PLACES=188, PETRI_TRANSITIONS=212} [2024-06-27 19:31:57,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-27 19:31:57,879 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 212 transitions, 2473 flow [2024-06-27 19:31:57,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:57,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:57,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:57,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:31:57,880 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)] === [2024-06-27 19:31:57,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash -565126384, now seen corresponding path program 2 times [2024-06-27 19:31:57,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:57,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73162279] [2024-06-27 19:31:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:57,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:57,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:57,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73162279] [2024-06-27 19:31:57,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73162279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:57,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:57,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:57,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459008607] [2024-06-27 19:31:57,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:57,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:57,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:57,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:57,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:58,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:58,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 212 transitions, 2473 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:58,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:58,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:58,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:58,412 INFO L124 PetriNetUnfolderBase]: 1822/3125 cut-off events. [2024-06-27 19:31:58,412 INFO L125 PetriNetUnfolderBase]: For 101069/101069 co-relation queries the response was YES. [2024-06-27 19:31:58,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17401 conditions, 3125 events. 1822/3125 cut-off events. For 101069/101069 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 19353 event pairs, 419 based on Foata normal form. 2/3121 useless extension candidates. Maximal degree in co-relation 17310. Up to 2724 conditions per place. [2024-06-27 19:31:58,438 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 163 selfloop transitions, 66 changer transitions 0/237 dead transitions. [2024-06-27 19:31:58,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 237 transitions, 3343 flow [2024-06-27 19:31:58,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:58,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:31:58,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-27 19:31:58,439 INFO L175 Difference]: Start difference. First operand has 188 places, 212 transitions, 2473 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:31:58,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 237 transitions, 3343 flow [2024-06-27 19:31:58,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 237 transitions, 3206 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 19:31:58,639 INFO L231 Difference]: Finished difference. Result has 192 places, 220 transitions, 2591 flow [2024-06-27 19:31:58,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2352, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2591, PETRI_PLACES=192, PETRI_TRANSITIONS=220} [2024-06-27 19:31:58,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-27 19:31:58,640 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 220 transitions, 2591 flow [2024-06-27 19:31:58,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:58,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:58,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:58,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:31:58,640 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)] === [2024-06-27 19:31:58,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:58,641 INFO L85 PathProgramCache]: Analyzing trace with hash -565120804, now seen corresponding path program 3 times [2024-06-27 19:31:58,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:58,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633438010] [2024-06-27 19:31:58,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:58,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:58,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:58,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633438010] [2024-06-27 19:31:58,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633438010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:58,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:58,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:58,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947891151] [2024-06-27 19:31:58,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:58,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:58,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:58,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:58,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:58,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:58,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 220 transitions, 2591 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:58,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:58,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:58,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:59,259 INFO L124 PetriNetUnfolderBase]: 1816/3117 cut-off events. [2024-06-27 19:31:59,259 INFO L125 PetriNetUnfolderBase]: For 103431/103431 co-relation queries the response was YES. [2024-06-27 19:31:59,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17360 conditions, 3117 events. 1816/3117 cut-off events. For 103431/103431 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 19303 event pairs, 419 based on Foata normal form. 2/3113 useless extension candidates. Maximal degree in co-relation 17267. Up to 2718 conditions per place. [2024-06-27 19:31:59,282 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 163 selfloop transitions, 67 changer transitions 0/238 dead transitions. [2024-06-27 19:31:59,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 238 transitions, 3273 flow [2024-06-27 19:31:59,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:31:59,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:31:59,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 19:31:59,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-27 19:31:59,283 INFO L175 Difference]: Start difference. First operand has 192 places, 220 transitions, 2591 flow. Second operand 9 states and 209 transitions. [2024-06-27 19:31:59,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 238 transitions, 3273 flow [2024-06-27 19:31:59,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 238 transitions, 3149 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 19:31:59,472 INFO L231 Difference]: Finished difference. Result has 198 places, 220 transitions, 2608 flow [2024-06-27 19:31:59,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2467, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2608, PETRI_PLACES=198, PETRI_TRANSITIONS=220} [2024-06-27 19:31:59,472 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-27 19:31:59,472 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 220 transitions, 2608 flow [2024-06-27 19:31:59,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:59,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:59,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:59,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:31:59,473 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)] === [2024-06-27 19:31:59,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:59,473 INFO L85 PathProgramCache]: Analyzing trace with hash -2128785538, now seen corresponding path program 4 times [2024-06-27 19:31:59,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:59,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652154422] [2024-06-27 19:31:59,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:59,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:59,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:59,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652154422] [2024-06-27 19:31:59,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652154422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:59,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:59,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:59,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57509306] [2024-06-27 19:31:59,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:59,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:59,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:59,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:59,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:59,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:59,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 220 transitions, 2608 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:59,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:59,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:59,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:00,102 INFO L124 PetriNetUnfolderBase]: 1850/3174 cut-off events. [2024-06-27 19:32:00,102 INFO L125 PetriNetUnfolderBase]: For 110861/110861 co-relation queries the response was YES. [2024-06-27 19:32:00,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18015 conditions, 3174 events. 1850/3174 cut-off events. For 110861/110861 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 19770 event pairs, 419 based on Foata normal form. 2/3170 useless extension candidates. Maximal degree in co-relation 17920. Up to 2662 conditions per place. [2024-06-27 19:32:00,131 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 152 selfloop transitions, 98 changer transitions 0/258 dead transitions. [2024-06-27 19:32:00,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 258 transitions, 3778 flow [2024-06-27 19:32:00,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:00,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-27 19:32:00,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-27 19:32:00,133 INFO L175 Difference]: Start difference. First operand has 198 places, 220 transitions, 2608 flow. Second operand 9 states and 221 transitions. [2024-06-27 19:32:00,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 258 transitions, 3778 flow [2024-06-27 19:32:00,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 258 transitions, 3633 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 19:32:00,359 INFO L231 Difference]: Finished difference. Result has 200 places, 231 transitions, 2849 flow [2024-06-27 19:32:00,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2463, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2849, PETRI_PLACES=200, PETRI_TRANSITIONS=231} [2024-06-27 19:32:00,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-27 19:32:00,360 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 231 transitions, 2849 flow [2024-06-27 19:32:00,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:00,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:00,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:00,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:32:00,361 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)] === [2024-06-27 19:32:00,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:00,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2128791118, now seen corresponding path program 5 times [2024-06-27 19:32:00,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:00,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637475226] [2024-06-27 19:32:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:00,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:00,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:00,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637475226] [2024-06-27 19:32:00,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637475226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:00,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:00,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:00,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402790936] [2024-06-27 19:32:00,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:00,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:00,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:00,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:00,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:00,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:00,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 231 transitions, 2849 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:00,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:00,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:00,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:00,965 INFO L124 PetriNetUnfolderBase]: 1844/3166 cut-off events. [2024-06-27 19:32:00,966 INFO L125 PetriNetUnfolderBase]: For 113490/113490 co-relation queries the response was YES. [2024-06-27 19:32:00,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18143 conditions, 3166 events. 1844/3166 cut-off events. For 113490/113490 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19694 event pairs, 419 based on Foata normal form. 2/3162 useless extension candidates. Maximal degree in co-relation 18046. Up to 2657 conditions per place. [2024-06-27 19:32:00,993 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 151 selfloop transitions, 96 changer transitions 0/255 dead transitions. [2024-06-27 19:32:00,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 255 transitions, 3777 flow [2024-06-27 19:32:00,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:00,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:00,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:32:00,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-27 19:32:00,994 INFO L175 Difference]: Start difference. First operand has 200 places, 231 transitions, 2849 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:32:00,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 255 transitions, 3777 flow [2024-06-27 19:32:01,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 255 transitions, 3530 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:01,265 INFO L231 Difference]: Finished difference. Result has 201 places, 231 transitions, 2814 flow [2024-06-27 19:32:01,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2610, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2814, PETRI_PLACES=201, PETRI_TRANSITIONS=231} [2024-06-27 19:32:01,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-27 19:32:01,265 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 231 transitions, 2814 flow [2024-06-27 19:32:01,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:01,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:01,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:01,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:32:01,266 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)] === [2024-06-27 19:32:01,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:01,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2121433888, now seen corresponding path program 6 times [2024-06-27 19:32:01,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:01,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692524563] [2024-06-27 19:32:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:01,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:01,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:01,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692524563] [2024-06-27 19:32:01,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692524563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:01,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:01,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:01,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385950372] [2024-06-27 19:32:01,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:01,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:01,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:01,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:01,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:01,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 231 transitions, 2814 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:01,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:01,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:01,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:01,839 INFO L124 PetriNetUnfolderBase]: 1877/3232 cut-off events. [2024-06-27 19:32:01,839 INFO L125 PetriNetUnfolderBase]: For 113549/113549 co-relation queries the response was YES. [2024-06-27 19:32:01,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18568 conditions, 3232 events. 1877/3232 cut-off events. For 113549/113549 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20213 event pairs, 398 based on Foata normal form. 2/3232 useless extension candidates. Maximal degree in co-relation 18471. Up to 2813 conditions per place. [2024-06-27 19:32:01,870 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 211 selfloop transitions, 53 changer transitions 0/272 dead transitions. [2024-06-27 19:32:01,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 272 transitions, 3792 flow [2024-06-27 19:32:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:01,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:01,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-27 19:32:01,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-27 19:32:01,871 INFO L175 Difference]: Start difference. First operand has 201 places, 231 transitions, 2814 flow. Second operand 6 states and 160 transitions. [2024-06-27 19:32:01,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 272 transitions, 3792 flow [2024-06-27 19:32:02,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 272 transitions, 3561 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:02,120 INFO L231 Difference]: Finished difference. Result has 202 places, 248 transitions, 3067 flow [2024-06-27 19:32:02,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2615, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3067, PETRI_PLACES=202, PETRI_TRANSITIONS=248} [2024-06-27 19:32:02,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-27 19:32:02,121 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 248 transitions, 3067 flow [2024-06-27 19:32:02,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:02,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:02,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:02,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:32:02,122 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)] === [2024-06-27 19:32:02,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:02,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1578934314, now seen corresponding path program 1 times [2024-06-27 19:32:02,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:02,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341477699] [2024-06-27 19:32:02,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:02,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:02,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:02,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341477699] [2024-06-27 19:32:02,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341477699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:02,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:02,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:02,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758421948] [2024-06-27 19:32:02,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:02,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:02,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:02,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:02,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:02,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:02,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 248 transitions, 3067 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:02,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:02,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:02,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:02,649 INFO L124 PetriNetUnfolderBase]: 1905/3285 cut-off events. [2024-06-27 19:32:02,650 INFO L125 PetriNetUnfolderBase]: For 116541/116547 co-relation queries the response was YES. [2024-06-27 19:32:02,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18881 conditions, 3285 events. 1905/3285 cut-off events. For 116541/116547 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20705 event pairs, 425 based on Foata normal form. 6/3286 useless extension candidates. Maximal degree in co-relation 18782. Up to 2729 conditions per place. [2024-06-27 19:32:02,681 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 203 selfloop transitions, 78 changer transitions 0/289 dead transitions. [2024-06-27 19:32:02,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 289 transitions, 4118 flow [2024-06-27 19:32:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:02,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:32:02,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:32:02,682 INFO L175 Difference]: Start difference. First operand has 202 places, 248 transitions, 3067 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:32:02,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 289 transitions, 4118 flow [2024-06-27 19:32:02,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 289 transitions, 4012 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:02,995 INFO L231 Difference]: Finished difference. Result has 207 places, 263 transitions, 3282 flow [2024-06-27 19:32:02,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3282, PETRI_PLACES=207, PETRI_TRANSITIONS=263} [2024-06-27 19:32:02,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-27 19:32:02,996 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 263 transitions, 3282 flow [2024-06-27 19:32:02,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:02,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:02,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:02,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:32:02,996 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)] === [2024-06-27 19:32:02,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:02,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1254193194, now seen corresponding path program 2 times [2024-06-27 19:32:02,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:02,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576331473] [2024-06-27 19:32:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:02,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:03,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:03,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576331473] [2024-06-27 19:32:03,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576331473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:03,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:03,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:03,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658450132] [2024-06-27 19:32:03,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:03,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:03,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:03,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:03,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:03,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:03,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 263 transitions, 3282 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:03,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:03,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:03,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:03,624 INFO L124 PetriNetUnfolderBase]: 1941/3347 cut-off events. [2024-06-27 19:32:03,624 INFO L125 PetriNetUnfolderBase]: For 125021/125027 co-relation queries the response was YES. [2024-06-27 19:32:03,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19742 conditions, 3347 events. 1941/3347 cut-off events. For 125021/125027 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21183 event pairs, 425 based on Foata normal form. 6/3348 useless extension candidates. Maximal degree in co-relation 19641. Up to 2760 conditions per place. [2024-06-27 19:32:03,724 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 203 selfloop transitions, 84 changer transitions 0/295 dead transitions. [2024-06-27 19:32:03,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 295 transitions, 4331 flow [2024-06-27 19:32:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:03,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:32:03,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:32:03,725 INFO L175 Difference]: Start difference. First operand has 207 places, 263 transitions, 3282 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:32:03,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 295 transitions, 4331 flow [2024-06-27 19:32:04,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 295 transitions, 4227 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:04,122 INFO L231 Difference]: Finished difference. Result has 214 places, 275 transitions, 3504 flow [2024-06-27 19:32:04,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3198, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3504, PETRI_PLACES=214, PETRI_TRANSITIONS=275} [2024-06-27 19:32:04,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-27 19:32:04,122 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 275 transitions, 3504 flow [2024-06-27 19:32:04,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:04,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:04,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:04,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:32:04,123 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)] === [2024-06-27 19:32:04,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:04,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1571210526, now seen corresponding path program 3 times [2024-06-27 19:32:04,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:04,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568854284] [2024-06-27 19:32:04,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:04,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:04,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:04,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568854284] [2024-06-27 19:32:04,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568854284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:04,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:04,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:04,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749480787] [2024-06-27 19:32:04,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:04,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:04,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:04,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:04,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:04,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:04,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 275 transitions, 3504 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:04,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:04,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:04,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:04,678 INFO L124 PetriNetUnfolderBase]: 1935/3339 cut-off events. [2024-06-27 19:32:04,679 INFO L125 PetriNetUnfolderBase]: For 127632/127638 co-relation queries the response was YES. [2024-06-27 19:32:04,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19895 conditions, 3339 events. 1935/3339 cut-off events. For 127632/127638 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21159 event pairs, 425 based on Foata normal form. 6/3340 useless extension candidates. Maximal degree in co-relation 19790. Up to 2755 conditions per place. [2024-06-27 19:32:04,709 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 201 selfloop transitions, 85 changer transitions 0/294 dead transitions. [2024-06-27 19:32:04,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 294 transitions, 4318 flow [2024-06-27 19:32:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:32:04,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-27 19:32:04,710 INFO L175 Difference]: Start difference. First operand has 214 places, 275 transitions, 3504 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:32:04,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 294 transitions, 4318 flow [2024-06-27 19:32:05,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 294 transitions, 4150 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:05,046 INFO L231 Difference]: Finished difference. Result has 218 places, 275 transitions, 3513 flow [2024-06-27 19:32:05,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3336, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3513, PETRI_PLACES=218, PETRI_TRANSITIONS=275} [2024-06-27 19:32:05,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-27 19:32:05,047 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 275 transitions, 3513 flow [2024-06-27 19:32:05,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:05,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:05,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:05,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:32:05,047 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)] === [2024-06-27 19:32:05,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:05,048 INFO L85 PathProgramCache]: Analyzing trace with hash -847716112, now seen corresponding path program 1 times [2024-06-27 19:32:05,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:05,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826382299] [2024-06-27 19:32:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:05,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:05,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:05,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826382299] [2024-06-27 19:32:05,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826382299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:05,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:05,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:05,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826480454] [2024-06-27 19:32:05,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:05,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:05,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:05,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:05,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:05,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:05,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 275 transitions, 3513 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:05,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:05,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:05,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:05,719 INFO L124 PetriNetUnfolderBase]: 1940/3344 cut-off events. [2024-06-27 19:32:05,720 INFO L125 PetriNetUnfolderBase]: For 130899/130905 co-relation queries the response was YES. [2024-06-27 19:32:05,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20047 conditions, 3344 events. 1940/3344 cut-off events. For 130899/130905 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21160 event pairs, 416 based on Foata normal form. 5/3345 useless extension candidates. Maximal degree in co-relation 19941. Up to 2902 conditions per place. [2024-06-27 19:32:05,754 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 228 selfloop transitions, 61 changer transitions 0/297 dead transitions. [2024-06-27 19:32:05,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 297 transitions, 4396 flow [2024-06-27 19:32:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:32:05,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-27 19:32:05,755 INFO L175 Difference]: Start difference. First operand has 218 places, 275 transitions, 3513 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:32:05,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 297 transitions, 4396 flow [2024-06-27 19:32:06,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 297 transitions, 4232 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:06,156 INFO L231 Difference]: Finished difference. Result has 221 places, 278 transitions, 3536 flow [2024-06-27 19:32:06,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3353, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3536, PETRI_PLACES=221, PETRI_TRANSITIONS=278} [2024-06-27 19:32:06,156 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-27 19:32:06,156 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 278 transitions, 3536 flow [2024-06-27 19:32:06,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:06,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:06,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:06,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:32:06,157 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)] === [2024-06-27 19:32:06,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:06,157 INFO L85 PathProgramCache]: Analyzing trace with hash -234570720, now seen corresponding path program 1 times [2024-06-27 19:32:06,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:06,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435224894] [2024-06-27 19:32:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:06,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:06,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:06,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435224894] [2024-06-27 19:32:06,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435224894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:06,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:06,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:06,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150640407] [2024-06-27 19:32:06,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:06,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:06,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:06,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:06,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:06,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:06,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 278 transitions, 3536 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:06,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:06,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:06,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:06,815 INFO L124 PetriNetUnfolderBase]: 1956/3368 cut-off events. [2024-06-27 19:32:06,815 INFO L125 PetriNetUnfolderBase]: For 139527/139533 co-relation queries the response was YES. [2024-06-27 19:32:06,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20228 conditions, 3368 events. 1956/3368 cut-off events. For 139527/139533 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 21288 event pairs, 417 based on Foata normal form. 8/3372 useless extension candidates. Maximal degree in co-relation 20121. Up to 2914 conditions per place. [2024-06-27 19:32:06,860 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 229 selfloop transitions, 64 changer transitions 0/301 dead transitions. [2024-06-27 19:32:06,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 301 transitions, 4426 flow [2024-06-27 19:32:06,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:06,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:06,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:32:06,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-27 19:32:06,862 INFO L175 Difference]: Start difference. First operand has 221 places, 278 transitions, 3536 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:32:06,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 301 transitions, 4426 flow [2024-06-27 19:32:07,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 301 transitions, 4319 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:07,190 INFO L231 Difference]: Finished difference. Result has 225 places, 281 transitions, 3621 flow [2024-06-27 19:32:07,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3621, PETRI_PLACES=225, PETRI_TRANSITIONS=281} [2024-06-27 19:32:07,190 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-27 19:32:07,190 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 281 transitions, 3621 flow [2024-06-27 19:32:07,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:07,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:07,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:07,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:32:07,191 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)] === [2024-06-27 19:32:07,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1774716800, now seen corresponding path program 4 times [2024-06-27 19:32:07,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:07,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621162014] [2024-06-27 19:32:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:07,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:07,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:07,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621162014] [2024-06-27 19:32:07,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621162014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:07,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:07,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:07,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166367516] [2024-06-27 19:32:07,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:07,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:07,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:07,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:07,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:07,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:07,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 281 transitions, 3621 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:07,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:07,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:07,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:07,816 INFO L124 PetriNetUnfolderBase]: 1982/3413 cut-off events. [2024-06-27 19:32:07,816 INFO L125 PetriNetUnfolderBase]: For 146007/146013 co-relation queries the response was YES. [2024-06-27 19:32:07,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20739 conditions, 3413 events. 1982/3413 cut-off events. For 146007/146013 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 21648 event pairs, 428 based on Foata normal form. 6/3414 useless extension candidates. Maximal degree in co-relation 20630. Up to 2808 conditions per place. [2024-06-27 19:32:07,848 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 203 selfloop transitions, 97 changer transitions 0/308 dead transitions. [2024-06-27 19:32:07,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 308 transitions, 4667 flow [2024-06-27 19:32:07,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:07,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:07,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 19:32:07,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:32:07,849 INFO L175 Difference]: Start difference. First operand has 225 places, 281 transitions, 3621 flow. Second operand 6 states and 156 transitions. [2024-06-27 19:32:07,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 308 transitions, 4667 flow [2024-06-27 19:32:08,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 308 transitions, 4497 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:08,304 INFO L231 Difference]: Finished difference. Result has 226 places, 289 transitions, 3745 flow [2024-06-27 19:32:08,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3451, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3745, PETRI_PLACES=226, PETRI_TRANSITIONS=289} [2024-06-27 19:32:08,304 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-27 19:32:08,305 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 289 transitions, 3745 flow [2024-06-27 19:32:08,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:08,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:08,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:08,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:32:08,305 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)] === [2024-06-27 19:32:08,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:08,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1779265272, now seen corresponding path program 5 times [2024-06-27 19:32:08,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:08,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381222011] [2024-06-27 19:32:08,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:08,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:08,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:08,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381222011] [2024-06-27 19:32:08,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381222011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:08,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:08,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:08,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53287648] [2024-06-27 19:32:08,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:08,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:08,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:08,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:08,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:08,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:08,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 289 transitions, 3745 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:08,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:08,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:08,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:08,871 INFO L124 PetriNetUnfolderBase]: 1976/3405 cut-off events. [2024-06-27 19:32:08,871 INFO L125 PetriNetUnfolderBase]: For 147961/147967 co-relation queries the response was YES. [2024-06-27 19:32:08,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20697 conditions, 3405 events. 1976/3405 cut-off events. For 147961/147967 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 21603 event pairs, 427 based on Foata normal form. 6/3406 useless extension candidates. Maximal degree in co-relation 20587. Up to 2803 conditions per place. [2024-06-27 19:32:08,904 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 206 selfloop transitions, 100 changer transitions 0/314 dead transitions. [2024-06-27 19:32:08,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 314 transitions, 4737 flow [2024-06-27 19:32:08,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-27 19:32:08,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-27 19:32:08,905 INFO L175 Difference]: Start difference. First operand has 226 places, 289 transitions, 3745 flow. Second operand 6 states and 162 transitions. [2024-06-27 19:32:08,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 314 transitions, 4737 flow [2024-06-27 19:32:09,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 314 transitions, 4555 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:09,387 INFO L231 Difference]: Finished difference. Result has 228 places, 289 transitions, 3786 flow [2024-06-27 19:32:09,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3569, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3786, PETRI_PLACES=228, PETRI_TRANSITIONS=289} [2024-06-27 19:32:09,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-27 19:32:09,387 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 289 transitions, 3786 flow [2024-06-27 19:32:09,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:09,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:09,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:09,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:32:09,388 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)] === [2024-06-27 19:32:09,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:09,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1346620130, now seen corresponding path program 6 times [2024-06-27 19:32:09,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:09,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11240043] [2024-06-27 19:32:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:09,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:09,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:09,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11240043] [2024-06-27 19:32:09,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11240043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:09,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:09,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:09,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814105873] [2024-06-27 19:32:09,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:09,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:09,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:09,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:09,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:09,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:09,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 289 transitions, 3786 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:09,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:09,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:09,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:10,029 INFO L124 PetriNetUnfolderBase]: 1986/3420 cut-off events. [2024-06-27 19:32:10,030 INFO L125 PetriNetUnfolderBase]: For 146661/146661 co-relation queries the response was YES. [2024-06-27 19:32:10,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20826 conditions, 3420 events. 1986/3420 cut-off events. For 146661/146661 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 21661 event pairs, 397 based on Foata normal form. 2/3420 useless extension candidates. Maximal degree in co-relation 20716. Up to 2917 conditions per place. [2024-06-27 19:32:10,060 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 243 selfloop transitions, 70 changer transitions 0/321 dead transitions. [2024-06-27 19:32:10,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 321 transitions, 4662 flow [2024-06-27 19:32:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:10,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:10,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-27 19:32:10,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6626016260162602 [2024-06-27 19:32:10,062 INFO L175 Difference]: Start difference. First operand has 228 places, 289 transitions, 3786 flow. Second operand 6 states and 163 transitions. [2024-06-27 19:32:10,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 321 transitions, 4662 flow [2024-06-27 19:32:10,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 321 transitions, 4459 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:10,443 INFO L231 Difference]: Finished difference. Result has 229 places, 295 transitions, 3881 flow [2024-06-27 19:32:10,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3596, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3881, PETRI_PLACES=229, PETRI_TRANSITIONS=295} [2024-06-27 19:32:10,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-27 19:32:10,444 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 295 transitions, 3881 flow [2024-06-27 19:32:10,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:10,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:10,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:10,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:32:10,444 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)] === [2024-06-27 19:32:10,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:10,445 INFO L85 PathProgramCache]: Analyzing trace with hash 47536468, now seen corresponding path program 1 times [2024-06-27 19:32:10,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:10,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345918824] [2024-06-27 19:32:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:10,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:10,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:10,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345918824] [2024-06-27 19:32:10,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345918824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:10,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:10,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:10,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115211002] [2024-06-27 19:32:10,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:10,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:10,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:10,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:10,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:10,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:10,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 295 transitions, 3881 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:10,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:10,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:10,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:10,998 INFO L124 PetriNetUnfolderBase]: 2007/3453 cut-off events. [2024-06-27 19:32:10,998 INFO L125 PetriNetUnfolderBase]: For 146155/146161 co-relation queries the response was YES. [2024-06-27 19:32:11,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21153 conditions, 3453 events. 2007/3453 cut-off events. For 146155/146161 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21875 event pairs, 423 based on Foata normal form. 1/3448 useless extension candidates. Maximal degree in co-relation 21043. Up to 2969 conditions per place. [2024-06-27 19:32:11,034 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 249 selfloop transitions, 68 changer transitions 0/325 dead transitions. [2024-06-27 19:32:11,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 325 transitions, 4925 flow [2024-06-27 19:32:11,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:11,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 19:32:11,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-27 19:32:11,035 INFO L175 Difference]: Start difference. First operand has 229 places, 295 transitions, 3881 flow. Second operand 6 states and 154 transitions. [2024-06-27 19:32:11,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 325 transitions, 4925 flow [2024-06-27 19:32:11,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 325 transitions, 4833 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:11,485 INFO L231 Difference]: Finished difference. Result has 232 places, 304 transitions, 4081 flow [2024-06-27 19:32:11,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3789, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4081, PETRI_PLACES=232, PETRI_TRANSITIONS=304} [2024-06-27 19:32:11,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-27 19:32:11,485 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 304 transitions, 4081 flow [2024-06-27 19:32:11,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:11,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:11,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:11,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:32:11,486 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)] === [2024-06-27 19:32:11,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:11,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1826292646, now seen corresponding path program 2 times [2024-06-27 19:32:11,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:11,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131579285] [2024-06-27 19:32:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:11,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:11,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:11,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131579285] [2024-06-27 19:32:11,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131579285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:11,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:11,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:11,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136161601] [2024-06-27 19:32:11,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:11,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:11,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:11,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:11,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:11,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:11,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 304 transitions, 4081 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:11,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:11,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:11,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:12,111 INFO L124 PetriNetUnfolderBase]: 2012/3464 cut-off events. [2024-06-27 19:32:12,112 INFO L125 PetriNetUnfolderBase]: For 151560/151566 co-relation queries the response was YES. [2024-06-27 19:32:12,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21345 conditions, 3464 events. 2012/3464 cut-off events. For 151560/151566 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 22001 event pairs, 409 based on Foata normal form. 5/3465 useless extension candidates. Maximal degree in co-relation 21234. Up to 3057 conditions per place. [2024-06-27 19:32:12,147 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 280 selfloop transitions, 35 changer transitions 0/323 dead transitions. [2024-06-27 19:32:12,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 323 transitions, 4807 flow [2024-06-27 19:32:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:12,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:12,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 19:32:12,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-27 19:32:12,148 INFO L175 Difference]: Start difference. First operand has 232 places, 304 transitions, 4081 flow. Second operand 6 states and 147 transitions. [2024-06-27 19:32:12,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 323 transitions, 4807 flow [2024-06-27 19:32:12,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 323 transitions, 4637 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:12,576 INFO L231 Difference]: Finished difference. Result has 235 places, 307 transitions, 4049 flow [2024-06-27 19:32:12,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3917, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4049, PETRI_PLACES=235, PETRI_TRANSITIONS=307} [2024-06-27 19:32:12,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-27 19:32:12,577 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 307 transitions, 4049 flow [2024-06-27 19:32:12,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:12,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:12,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:12,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:32:12,578 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)] === [2024-06-27 19:32:12,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:12,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1910341798, now seen corresponding path program 3 times [2024-06-27 19:32:12,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:12,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844277346] [2024-06-27 19:32:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:12,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:12,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:12,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:12,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844277346] [2024-06-27 19:32:12,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844277346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:12,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:12,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:12,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026856045] [2024-06-27 19:32:12,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:12,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:12,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:12,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:12,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:12,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:12,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 307 transitions, 4049 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:12,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:12,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:12,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:13,135 INFO L124 PetriNetUnfolderBase]: 2017/3467 cut-off events. [2024-06-27 19:32:13,136 INFO L125 PetriNetUnfolderBase]: For 157507/157513 co-relation queries the response was YES. [2024-06-27 19:32:13,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21384 conditions, 3467 events. 2017/3467 cut-off events. For 157507/157513 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22004 event pairs, 424 based on Foata normal form. 5/3465 useless extension candidates. Maximal degree in co-relation 21273. Up to 2981 conditions per place. [2024-06-27 19:32:13,174 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 250 selfloop transitions, 70 changer transitions 0/328 dead transitions. [2024-06-27 19:32:13,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 328 transitions, 4999 flow [2024-06-27 19:32:13,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:13,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:13,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:32:13,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-27 19:32:13,175 INFO L175 Difference]: Start difference. First operand has 235 places, 307 transitions, 4049 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:32:13,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 328 transitions, 4999 flow [2024-06-27 19:32:13,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 328 transitions, 4899 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:13,660 INFO L231 Difference]: Finished difference. Result has 236 places, 310 transitions, 4145 flow [2024-06-27 19:32:13,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3949, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4145, PETRI_PLACES=236, PETRI_TRANSITIONS=310} [2024-06-27 19:32:13,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-27 19:32:13,661 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 310 transitions, 4145 flow [2024-06-27 19:32:13,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:13,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:13,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:13,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:32:13,661 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)] === [2024-06-27 19:32:13,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:13,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1922721958, now seen corresponding path program 4 times [2024-06-27 19:32:13,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:13,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964592520] [2024-06-27 19:32:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:13,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:13,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:13,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964592520] [2024-06-27 19:32:13,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964592520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:13,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:13,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:13,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678696984] [2024-06-27 19:32:13,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:13,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:13,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:13,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:13,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:13,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:13,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 310 transitions, 4145 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:13,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:13,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:13,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:14,287 INFO L124 PetriNetUnfolderBase]: 2014/3463 cut-off events. [2024-06-27 19:32:14,288 INFO L125 PetriNetUnfolderBase]: For 161064/161070 co-relation queries the response was YES. [2024-06-27 19:32:14,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21467 conditions, 3463 events. 2014/3463 cut-off events. For 161064/161070 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21995 event pairs, 424 based on Foata normal form. 5/3461 useless extension candidates. Maximal degree in co-relation 21356. Up to 2978 conditions per place. [2024-06-27 19:32:14,324 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 247 selfloop transitions, 69 changer transitions 0/324 dead transitions. [2024-06-27 19:32:14,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 324 transitions, 4921 flow [2024-06-27 19:32:14,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:14,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:32:14,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-27 19:32:14,325 INFO L175 Difference]: Start difference. First operand has 236 places, 310 transitions, 4145 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:32:14,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 324 transitions, 4921 flow [2024-06-27 19:32:14,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 324 transitions, 4721 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:14,835 INFO L231 Difference]: Finished difference. Result has 238 places, 310 transitions, 4089 flow [2024-06-27 19:32:14,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3945, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4089, PETRI_PLACES=238, PETRI_TRANSITIONS=310} [2024-06-27 19:32:14,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-27 19:32:14,836 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 310 transitions, 4089 flow [2024-06-27 19:32:14,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:14,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:14,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:14,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:32:14,836 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)] === [2024-06-27 19:32:14,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:14,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1672072224, now seen corresponding path program 2 times [2024-06-27 19:32:14,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:14,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737925874] [2024-06-27 19:32:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:14,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:14,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:14,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737925874] [2024-06-27 19:32:14,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737925874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:14,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:14,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:14,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067927921] [2024-06-27 19:32:14,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:14,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:14,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:14,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:14,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:14,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:14,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 310 transitions, 4089 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:14,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:14,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:14,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:15,463 INFO L124 PetriNetUnfolderBase]: 2019/3467 cut-off events. [2024-06-27 19:32:15,463 INFO L125 PetriNetUnfolderBase]: For 164340/164340 co-relation queries the response was YES. [2024-06-27 19:32:15,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21568 conditions, 3467 events. 2019/3467 cut-off events. For 164340/164340 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21990 event pairs, 418 based on Foata normal form. 1/3462 useless extension candidates. Maximal degree in co-relation 21456. Up to 3013 conditions per place. [2024-06-27 19:32:15,497 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 257 selfloop transitions, 64 changer transitions 0/329 dead transitions. [2024-06-27 19:32:15,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 329 transitions, 5055 flow [2024-06-27 19:32:15,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:15,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:15,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:32:15,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:32:15,498 INFO L175 Difference]: Start difference. First operand has 238 places, 310 transitions, 4089 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:32:15,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 329 transitions, 5055 flow [2024-06-27 19:32:15,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 329 transitions, 4870 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:15,935 INFO L231 Difference]: Finished difference. Result has 240 places, 313 transitions, 4100 flow [2024-06-27 19:32:15,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3904, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4100, PETRI_PLACES=240, PETRI_TRANSITIONS=313} [2024-06-27 19:32:15,936 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-27 19:32:15,936 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 313 transitions, 4100 flow [2024-06-27 19:32:15,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:15,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:15,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:15,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:32:15,937 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)] === [2024-06-27 19:32:15,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:15,937 INFO L85 PathProgramCache]: Analyzing trace with hash -339062328, now seen corresponding path program 5 times [2024-06-27 19:32:15,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:15,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530524826] [2024-06-27 19:32:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:15,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:16,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:16,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530524826] [2024-06-27 19:32:16,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530524826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:16,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:16,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:16,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720690419] [2024-06-27 19:32:16,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:16,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:16,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:16,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:16,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:16,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:16,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 313 transitions, 4100 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:16,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:16,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:16,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:16,521 INFO L124 PetriNetUnfolderBase]: 2013/3464 cut-off events. [2024-06-27 19:32:16,522 INFO L125 PetriNetUnfolderBase]: For 168951/168957 co-relation queries the response was YES. [2024-06-27 19:32:16,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21390 conditions, 3464 events. 2013/3464 cut-off events. For 168951/168957 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22035 event pairs, 423 based on Foata normal form. 6/3463 useless extension candidates. Maximal degree in co-relation 21278. Up to 2994 conditions per place. [2024-06-27 19:32:16,556 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 262 selfloop transitions, 59 changer transitions 0/329 dead transitions. [2024-06-27 19:32:16,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 329 transitions, 4896 flow [2024-06-27 19:32:16,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:16,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:16,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 19:32:16,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-27 19:32:16,557 INFO L175 Difference]: Start difference. First operand has 240 places, 313 transitions, 4100 flow. Second operand 5 states and 129 transitions. [2024-06-27 19:32:16,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 329 transitions, 4896 flow [2024-06-27 19:32:17,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 329 transitions, 4753 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:17,080 INFO L231 Difference]: Finished difference. Result has 241 places, 313 transitions, 4089 flow [2024-06-27 19:32:17,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3957, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4089, PETRI_PLACES=241, PETRI_TRANSITIONS=313} [2024-06-27 19:32:17,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-27 19:32:17,081 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 313 transitions, 4089 flow [2024-06-27 19:32:17,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:17,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:17,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:17,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:32:17,081 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)] === [2024-06-27 19:32:17,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:17,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1702907118, now seen corresponding path program 6 times [2024-06-27 19:32:17,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:17,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632299854] [2024-06-27 19:32:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:17,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:17,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:17,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632299854] [2024-06-27 19:32:17,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632299854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:17,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:17,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:17,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192502702] [2024-06-27 19:32:17,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:17,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:17,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:17,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:17,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:17,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:17,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 313 transitions, 4089 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:17,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:17,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:17,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:17,703 INFO L124 PetriNetUnfolderBase]: 2007/3462 cut-off events. [2024-06-27 19:32:17,704 INFO L125 PetriNetUnfolderBase]: For 170065/170071 co-relation queries the response was YES. [2024-06-27 19:32:17,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21290 conditions, 3462 events. 2007/3462 cut-off events. For 170065/170071 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22042 event pairs, 407 based on Foata normal form. 6/3464 useless extension candidates. Maximal degree in co-relation 21176. Up to 2988 conditions per place. [2024-06-27 19:32:17,741 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 264 selfloop transitions, 67 changer transitions 0/339 dead transitions. [2024-06-27 19:32:17,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 339 transitions, 4817 flow [2024-06-27 19:32:17,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:17,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:32:17,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:32:17,743 INFO L175 Difference]: Start difference. First operand has 241 places, 313 transitions, 4089 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:32:17,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 339 transitions, 4817 flow [2024-06-27 19:32:18,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 339 transitions, 4638 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:18,238 INFO L231 Difference]: Finished difference. Result has 242 places, 313 transitions, 4061 flow [2024-06-27 19:32:18,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3910, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4061, PETRI_PLACES=242, PETRI_TRANSITIONS=313} [2024-06-27 19:32:18,239 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-27 19:32:18,239 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 313 transitions, 4061 flow [2024-06-27 19:32:18,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:18,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:18,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:18,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:32:18,239 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)] === [2024-06-27 19:32:18,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:18,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1936843884, now seen corresponding path program 3 times [2024-06-27 19:32:18,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:18,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754224764] [2024-06-27 19:32:18,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:18,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:18,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:18,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754224764] [2024-06-27 19:32:18,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754224764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:18,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:18,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:18,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159476402] [2024-06-27 19:32:18,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:18,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:18,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:18,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:18,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:18,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:18,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 313 transitions, 4061 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:18,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:18,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:18,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:18,838 INFO L124 PetriNetUnfolderBase]: 2004/3458 cut-off events. [2024-06-27 19:32:18,839 INFO L125 PetriNetUnfolderBase]: For 166661/166667 co-relation queries the response was YES. [2024-06-27 19:32:18,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21198 conditions, 3458 events. 2004/3458 cut-off events. For 166661/166667 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22001 event pairs, 414 based on Foata normal form. 5/3459 useless extension candidates. Maximal degree in co-relation 21084. Up to 2994 conditions per place. [2024-06-27 19:32:18,875 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 257 selfloop transitions, 65 changer transitions 0/330 dead transitions. [2024-06-27 19:32:18,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 330 transitions, 4863 flow [2024-06-27 19:32:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:32:18,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:32:18,876 INFO L175 Difference]: Start difference. First operand has 242 places, 313 transitions, 4061 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:32:18,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 330 transitions, 4863 flow [2024-06-27 19:32:19,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 330 transitions, 4703 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:19,316 INFO L231 Difference]: Finished difference. Result has 241 places, 313 transitions, 4045 flow [2024-06-27 19:32:19,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3905, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4045, PETRI_PLACES=241, PETRI_TRANSITIONS=313} [2024-06-27 19:32:19,316 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-27 19:32:19,316 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 313 transitions, 4045 flow [2024-06-27 19:32:19,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:19,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:19,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:19,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:32:19,317 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)] === [2024-06-27 19:32:19,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:19,317 INFO L85 PathProgramCache]: Analyzing trace with hash 145141812, now seen corresponding path program 4 times [2024-06-27 19:32:19,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:19,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101591143] [2024-06-27 19:32:19,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:19,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:19,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:19,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101591143] [2024-06-27 19:32:19,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101591143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:19,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:19,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:19,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827526304] [2024-06-27 19:32:19,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:19,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:19,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:19,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:19,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:19,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:19,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 313 transitions, 4045 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:19,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:19,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:19,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:19,970 INFO L124 PetriNetUnfolderBase]: 2001/3443 cut-off events. [2024-06-27 19:32:19,970 INFO L125 PetriNetUnfolderBase]: For 160069/160069 co-relation queries the response was YES. [2024-06-27 19:32:19,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20974 conditions, 3443 events. 2001/3443 cut-off events. For 160069/160069 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21838 event pairs, 417 based on Foata normal form. 1/3438 useless extension candidates. Maximal degree in co-relation 20860. Up to 2991 conditions per place. [2024-06-27 19:32:20,007 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 253 selfloop transitions, 65 changer transitions 0/326 dead transitions. [2024-06-27 19:32:20,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 326 transitions, 4713 flow [2024-06-27 19:32:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:32:20,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-27 19:32:20,008 INFO L175 Difference]: Start difference. First operand has 241 places, 313 transitions, 4045 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:32:20,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 326 transitions, 4713 flow [2024-06-27 19:32:20,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 326 transitions, 4497 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:20,598 INFO L231 Difference]: Finished difference. Result has 240 places, 313 transitions, 3969 flow [2024-06-27 19:32:20,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3829, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3969, PETRI_PLACES=240, PETRI_TRANSITIONS=313} [2024-06-27 19:32:20,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-27 19:32:20,599 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 313 transitions, 3969 flow [2024-06-27 19:32:20,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:20,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:20,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:20,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:32:20,600 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)] === [2024-06-27 19:32:20,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:20,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1774702912, now seen corresponding path program 2 times [2024-06-27 19:32:20,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:20,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348895720] [2024-06-27 19:32:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:20,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:20,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:20,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348895720] [2024-06-27 19:32:20,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348895720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:20,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:20,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:20,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816121013] [2024-06-27 19:32:20,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:20,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:20,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:20,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:20,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:20,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:20,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 313 transitions, 3969 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:20,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:20,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:20,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:21,235 INFO L124 PetriNetUnfolderBase]: 2017/3478 cut-off events. [2024-06-27 19:32:21,235 INFO L125 PetriNetUnfolderBase]: For 164690/164696 co-relation queries the response was YES. [2024-06-27 19:32:21,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21067 conditions, 3478 events. 2017/3478 cut-off events. For 164690/164696 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22149 event pairs, 416 based on Foata normal form. 8/3482 useless extension candidates. Maximal degree in co-relation 20954. Up to 2991 conditions per place. [2024-06-27 19:32:21,272 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 254 selfloop transitions, 71 changer transitions 0/333 dead transitions. [2024-06-27 19:32:21,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 333 transitions, 4719 flow [2024-06-27 19:32:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:21,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:21,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:32:21,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:32:21,273 INFO L175 Difference]: Start difference. First operand has 240 places, 313 transitions, 3969 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:32:21,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 333 transitions, 4719 flow [2024-06-27 19:32:21,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 333 transitions, 4543 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:21,690 INFO L231 Difference]: Finished difference. Result has 240 places, 316 transitions, 4009 flow [2024-06-27 19:32:21,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3793, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4009, PETRI_PLACES=240, PETRI_TRANSITIONS=316} [2024-06-27 19:32:21,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-27 19:32:21,690 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 316 transitions, 4009 flow [2024-06-27 19:32:21,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:21,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:21,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:21,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:32:21,691 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)] === [2024-06-27 19:32:21,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:21,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1924322736, now seen corresponding path program 3 times [2024-06-27 19:32:21,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:21,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615700803] [2024-06-27 19:32:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:21,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:21,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:21,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615700803] [2024-06-27 19:32:21,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615700803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:21,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:21,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:21,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538007900] [2024-06-27 19:32:21,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:21,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:21,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:21,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:21,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:21,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:21,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 316 transitions, 4009 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:21,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:21,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:21,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:22,452 INFO L124 PetriNetUnfolderBase]: 2033/3504 cut-off events. [2024-06-27 19:32:22,452 INFO L125 PetriNetUnfolderBase]: For 163993/163993 co-relation queries the response was YES. [2024-06-27 19:32:22,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21407 conditions, 3504 events. 2033/3504 cut-off events. For 163993/163993 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 22331 event pairs, 397 based on Foata normal form. 4/3506 useless extension candidates. Maximal degree in co-relation 21294. Up to 3067 conditions per place. [2024-06-27 19:32:22,484 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 285 selfloop transitions, 46 changer transitions 0/339 dead transitions. [2024-06-27 19:32:22,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 339 transitions, 4785 flow [2024-06-27 19:32:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:32:22,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:32:22,485 INFO L175 Difference]: Start difference. First operand has 240 places, 316 transitions, 4009 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:32:22,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 339 transitions, 4785 flow [2024-06-27 19:32:22,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 339 transitions, 4591 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:22,887 INFO L231 Difference]: Finished difference. Result has 242 places, 319 transitions, 3983 flow [2024-06-27 19:32:22,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3821, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3983, PETRI_PLACES=242, PETRI_TRANSITIONS=319} [2024-06-27 19:32:22,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-27 19:32:22,888 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 319 transitions, 3983 flow [2024-06-27 19:32:22,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:22,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:22,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:22,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:32:22,888 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)] === [2024-06-27 19:32:22,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:22,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1923875406, now seen corresponding path program 4 times [2024-06-27 19:32:22,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:22,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563330726] [2024-06-27 19:32:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:22,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:22,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:22,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563330726] [2024-06-27 19:32:22,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563330726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:22,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:22,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:22,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880016444] [2024-06-27 19:32:22,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:22,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:22,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:22,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:22,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:23,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:23,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 319 transitions, 3983 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:23,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:23,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:23,530 INFO L124 PetriNetUnfolderBase]: 2065/3558 cut-off events. [2024-06-27 19:32:23,530 INFO L125 PetriNetUnfolderBase]: For 167330/167330 co-relation queries the response was YES. [2024-06-27 19:32:23,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21725 conditions, 3558 events. 2065/3558 cut-off events. For 167330/167330 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 22704 event pairs, 396 based on Foata normal form. 4/3560 useless extension candidates. Maximal degree in co-relation 21611. Up to 3060 conditions per place. [2024-06-27 19:32:23,566 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 292 selfloop transitions, 44 changer transitions 0/344 dead transitions. [2024-06-27 19:32:23,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 344 transitions, 4937 flow [2024-06-27 19:32:23,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:32:23,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-27 19:32:23,567 INFO L175 Difference]: Start difference. First operand has 242 places, 319 transitions, 3983 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:32:23,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 344 transitions, 4937 flow [2024-06-27 19:32:24,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 344 transitions, 4821 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:24,162 INFO L231 Difference]: Finished difference. Result has 246 places, 325 transitions, 4102 flow [2024-06-27 19:32:24,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3867, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4102, PETRI_PLACES=246, PETRI_TRANSITIONS=325} [2024-06-27 19:32:24,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-27 19:32:24,162 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 325 transitions, 4102 flow [2024-06-27 19:32:24,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:24,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:24,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:32:24,163 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)] === [2024-06-27 19:32:24,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:24,163 INFO L85 PathProgramCache]: Analyzing trace with hash -457200538, now seen corresponding path program 1 times [2024-06-27 19:32:24,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:24,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765904134] [2024-06-27 19:32:24,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:24,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:24,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:24,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765904134] [2024-06-27 19:32:24,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765904134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:24,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:24,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:24,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347159038] [2024-06-27 19:32:24,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:24,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:24,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:24,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:24,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:24,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:24,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 325 transitions, 4102 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:24,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:24,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:24,793 INFO L124 PetriNetUnfolderBase]: 2094/3599 cut-off events. [2024-06-27 19:32:24,793 INFO L125 PetriNetUnfolderBase]: For 180633/180633 co-relation queries the response was YES. [2024-06-27 19:32:24,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22343 conditions, 3599 events. 2094/3599 cut-off events. For 180633/180633 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 22967 event pairs, 374 based on Foata normal form. 4/3596 useless extension candidates. Maximal degree in co-relation 22227. Up to 3024 conditions per place. [2024-06-27 19:32:24,831 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 263 selfloop transitions, 83 changer transitions 0/354 dead transitions. [2024-06-27 19:32:24,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 354 transitions, 5078 flow [2024-06-27 19:32:24,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:32:24,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:32:24,833 INFO L175 Difference]: Start difference. First operand has 246 places, 325 transitions, 4102 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:32:24,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 354 transitions, 5078 flow [2024-06-27 19:32:25,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 354 transitions, 4955 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:25,245 INFO L231 Difference]: Finished difference. Result has 251 places, 331 transitions, 4269 flow [2024-06-27 19:32:25,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3979, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4269, PETRI_PLACES=251, PETRI_TRANSITIONS=331} [2024-06-27 19:32:25,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-27 19:32:25,246 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 331 transitions, 4269 flow [2024-06-27 19:32:25,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:25,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:25,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:32:25,246 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)] === [2024-06-27 19:32:25,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:25,246 INFO L85 PathProgramCache]: Analyzing trace with hash -454343578, now seen corresponding path program 2 times [2024-06-27 19:32:25,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:25,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127293325] [2024-06-27 19:32:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:25,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:25,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:25,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127293325] [2024-06-27 19:32:25,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127293325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:25,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:25,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:25,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365245884] [2024-06-27 19:32:25,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:25,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:25,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:25,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:25,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:25,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:25,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 331 transitions, 4269 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:25,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:25,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:25,971 INFO L124 PetriNetUnfolderBase]: 2110/3618 cut-off events. [2024-06-27 19:32:25,971 INFO L125 PetriNetUnfolderBase]: For 185689/185689 co-relation queries the response was YES. [2024-06-27 19:32:26,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22708 conditions, 3618 events. 2110/3618 cut-off events. For 185689/185689 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 23076 event pairs, 431 based on Foata normal form. 4/3615 useless extension candidates. Maximal degree in co-relation 22590. Up to 3116 conditions per place. [2024-06-27 19:32:26,013 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 266 selfloop transitions, 78 changer transitions 0/352 dead transitions. [2024-06-27 19:32:26,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 352 transitions, 5063 flow [2024-06-27 19:32:26,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:26,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:32:26,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-27 19:32:26,014 INFO L175 Difference]: Start difference. First operand has 251 places, 331 transitions, 4269 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:32:26,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 352 transitions, 5063 flow [2024-06-27 19:32:26,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 352 transitions, 4871 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:26,400 INFO L231 Difference]: Finished difference. Result has 255 places, 334 transitions, 4307 flow [2024-06-27 19:32:26,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4103, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4307, PETRI_PLACES=255, PETRI_TRANSITIONS=334} [2024-06-27 19:32:26,400 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-27 19:32:26,400 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 334 transitions, 4307 flow [2024-06-27 19:32:26,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:26,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:26,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:26,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:32:26,401 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)] === [2024-06-27 19:32:26,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:26,401 INFO L85 PathProgramCache]: Analyzing trace with hash -339052408, now seen corresponding path program 3 times [2024-06-27 19:32:26,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:26,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793011463] [2024-06-27 19:32:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:26,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:26,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:26,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793011463] [2024-06-27 19:32:26,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793011463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:26,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:26,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:26,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264705771] [2024-06-27 19:32:26,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:26,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:26,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:26,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:26,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:26,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:26,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 334 transitions, 4307 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:26,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:26,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:26,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:27,069 INFO L124 PetriNetUnfolderBase]: 2126/3647 cut-off events. [2024-06-27 19:32:27,069 INFO L125 PetriNetUnfolderBase]: For 190282/190282 co-relation queries the response was YES. [2024-06-27 19:32:27,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22881 conditions, 3647 events. 2126/3647 cut-off events. For 190282/190282 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 23266 event pairs, 415 based on Foata normal form. 4/3645 useless extension candidates. Maximal degree in co-relation 22761. Up to 3215 conditions per place. [2024-06-27 19:32:27,108 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 305 selfloop transitions, 39 changer transitions 0/352 dead transitions. [2024-06-27 19:32:27,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 352 transitions, 5073 flow [2024-06-27 19:32:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:27,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:32:27,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-27 19:32:27,109 INFO L175 Difference]: Start difference. First operand has 255 places, 334 transitions, 4307 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:32:27,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 352 transitions, 5073 flow [2024-06-27 19:32:27,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 352 transitions, 4897 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:27,549 INFO L231 Difference]: Finished difference. Result has 257 places, 337 transitions, 4263 flow [2024-06-27 19:32:27,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4131, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4263, PETRI_PLACES=257, PETRI_TRANSITIONS=337} [2024-06-27 19:32:27,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-27 19:32:27,550 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 337 transitions, 4263 flow [2024-06-27 19:32:27,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:27,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:27,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:27,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:32:27,551 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)] === [2024-06-27 19:32:27,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:27,551 INFO L85 PathProgramCache]: Analyzing trace with hash -338867710, now seen corresponding path program 1 times [2024-06-27 19:32:27,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:27,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620829322] [2024-06-27 19:32:27,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:27,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:27,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:27,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620829322] [2024-06-27 19:32:27,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620829322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:27,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:27,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:27,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596748210] [2024-06-27 19:32:27,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:27,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:27,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:27,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:27,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:27,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:27,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 337 transitions, 4263 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:27,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:27,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:27,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:28,265 INFO L124 PetriNetUnfolderBase]: 2142/3670 cut-off events. [2024-06-27 19:32:28,265 INFO L125 PetriNetUnfolderBase]: For 196359/196359 co-relation queries the response was YES. [2024-06-27 19:32:28,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23063 conditions, 3670 events. 2142/3670 cut-off events. For 196359/196359 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23432 event pairs, 424 based on Foata normal form. 4/3668 useless extension candidates. Maximal degree in co-relation 22942. Up to 3190 conditions per place. [2024-06-27 19:32:28,308 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 280 selfloop transitions, 67 changer transitions 0/355 dead transitions. [2024-06-27 19:32:28,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 355 transitions, 5061 flow [2024-06-27 19:32:28,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:32:28,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-27 19:32:28,309 INFO L175 Difference]: Start difference. First operand has 257 places, 337 transitions, 4263 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:32:28,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 355 transitions, 5061 flow [2024-06-27 19:32:28,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 355 transitions, 4957 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:28,703 INFO L231 Difference]: Finished difference. Result has 259 places, 340 transitions, 4373 flow [2024-06-27 19:32:28,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4159, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4373, PETRI_PLACES=259, PETRI_TRANSITIONS=340} [2024-06-27 19:32:28,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-27 19:32:28,704 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 340 transitions, 4373 flow [2024-06-27 19:32:28,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:28,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:28,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:32:28,704 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)] === [2024-06-27 19:32:28,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:28,705 INFO L85 PathProgramCache]: Analyzing trace with hash 144972986, now seen corresponding path program 4 times [2024-06-27 19:32:28,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:28,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996228543] [2024-06-27 19:32:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:28,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:28,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:28,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996228543] [2024-06-27 19:32:28,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996228543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:28,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:28,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:28,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904421949] [2024-06-27 19:32:28,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:28,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:28,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:28,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:28,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:28,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:28,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 340 transitions, 4373 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:28,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:28,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:29,401 INFO L124 PetriNetUnfolderBase]: 2132/3662 cut-off events. [2024-06-27 19:32:29,402 INFO L125 PetriNetUnfolderBase]: For 195005/195005 co-relation queries the response was YES. [2024-06-27 19:32:29,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22951 conditions, 3662 events. 2132/3662 cut-off events. For 195005/195005 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23414 event pairs, 358 based on Foata normal form. 4/3660 useless extension candidates. Maximal degree in co-relation 22829. Up to 3115 conditions per place. [2024-06-27 19:32:29,440 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 280 selfloop transitions, 76 changer transitions 0/364 dead transitions. [2024-06-27 19:32:29,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 364 transitions, 5145 flow [2024-06-27 19:32:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:32:29,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-27 19:32:29,442 INFO L175 Difference]: Start difference. First operand has 259 places, 340 transitions, 4373 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:32:29,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 364 transitions, 5145 flow [2024-06-27 19:32:29,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 364 transitions, 4933 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:29,849 INFO L231 Difference]: Finished difference. Result has 261 places, 340 transitions, 4328 flow [2024-06-27 19:32:29,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4161, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4328, PETRI_PLACES=261, PETRI_TRANSITIONS=340} [2024-06-27 19:32:29,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-27 19:32:29,849 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 340 transitions, 4328 flow [2024-06-27 19:32:29,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:29,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:29,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:29,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:32:29,850 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)] === [2024-06-27 19:32:29,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:29,851 INFO L85 PathProgramCache]: Analyzing trace with hash 145157684, now seen corresponding path program 2 times [2024-06-27 19:32:29,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:29,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259992209] [2024-06-27 19:32:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:29,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:29,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:29,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259992209] [2024-06-27 19:32:29,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259992209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:29,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:29,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:29,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509324513] [2024-06-27 19:32:29,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:29,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:29,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:29,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:29,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:29,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:29,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 340 transitions, 4328 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:29,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:29,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:29,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:30,498 INFO L124 PetriNetUnfolderBase]: 2135/3661 cut-off events. [2024-06-27 19:32:30,499 INFO L125 PetriNetUnfolderBase]: For 196555/196555 co-relation queries the response was YES. [2024-06-27 19:32:30,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22893 conditions, 3661 events. 2135/3661 cut-off events. For 196555/196555 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23376 event pairs, 421 based on Foata normal form. 4/3659 useless extension candidates. Maximal degree in co-relation 22770. Up to 3169 conditions per place. [2024-06-27 19:32:30,538 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 278 selfloop transitions, 71 changer transitions 0/357 dead transitions. [2024-06-27 19:32:30,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 357 transitions, 5134 flow [2024-06-27 19:32:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:30,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 19:32:30,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-27 19:32:30,539 INFO L175 Difference]: Start difference. First operand has 261 places, 340 transitions, 4328 flow. Second operand 6 states and 147 transitions. [2024-06-27 19:32:30,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 357 transitions, 5134 flow [2024-06-27 19:32:31,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 357 transitions, 4970 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:31,044 INFO L231 Difference]: Finished difference. Result has 261 places, 343 transitions, 4396 flow [2024-06-27 19:32:31,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4164, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4396, PETRI_PLACES=261, PETRI_TRANSITIONS=343} [2024-06-27 19:32:31,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-27 19:32:31,045 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 343 transitions, 4396 flow [2024-06-27 19:32:31,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:31,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:31,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:31,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:32:31,045 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)] === [2024-06-27 19:32:31,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:31,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1561578098, now seen corresponding path program 3 times [2024-06-27 19:32:31,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:31,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229103601] [2024-06-27 19:32:31,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:31,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:31,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:31,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229103601] [2024-06-27 19:32:31,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229103601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:31,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:31,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:31,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652448161] [2024-06-27 19:32:31,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:31,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:31,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:31,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:31,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:31,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:31,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 343 transitions, 4396 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:31,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:31,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:31,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:31,816 INFO L124 PetriNetUnfolderBase]: 2151/3693 cut-off events. [2024-06-27 19:32:31,816 INFO L125 PetriNetUnfolderBase]: For 195298/195298 co-relation queries the response was YES. [2024-06-27 19:32:31,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23108 conditions, 3693 events. 2151/3693 cut-off events. For 195298/195298 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23565 event pairs, 399 based on Foata normal form. 4/3695 useless extension candidates. Maximal degree in co-relation 22984. Up to 3245 conditions per place. [2024-06-27 19:32:31,856 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 312 selfloop transitions, 46 changer transitions 0/366 dead transitions. [2024-06-27 19:32:31,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 366 transitions, 5206 flow [2024-06-27 19:32:31,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:31,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:32:31,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:32:31,857 INFO L175 Difference]: Start difference. First operand has 261 places, 343 transitions, 4396 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:32:31,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 366 transitions, 5206 flow [2024-06-27 19:32:32,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 366 transitions, 5002 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:32,283 INFO L231 Difference]: Finished difference. Result has 263 places, 346 transitions, 4340 flow [2024-06-27 19:32:32,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4192, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4340, PETRI_PLACES=263, PETRI_TRANSITIONS=346} [2024-06-27 19:32:32,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-27 19:32:32,283 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 346 transitions, 4340 flow [2024-06-27 19:32:32,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:32,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:32,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:32,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:32:32,284 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)] === [2024-06-27 19:32:32,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:32,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1708414198, now seen corresponding path program 4 times [2024-06-27 19:32:32,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:32,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779457116] [2024-06-27 19:32:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:32,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:32,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:32,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779457116] [2024-06-27 19:32:32,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779457116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:32,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:32,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:32,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243134457] [2024-06-27 19:32:32,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:32,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:32,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:32,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:32,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:32,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:32,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 346 transitions, 4340 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:32,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:32,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:32,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:33,069 INFO L124 PetriNetUnfolderBase]: 2138/3665 cut-off events. [2024-06-27 19:32:33,069 INFO L125 PetriNetUnfolderBase]: For 185606/185606 co-relation queries the response was YES. [2024-06-27 19:32:33,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22470 conditions, 3665 events. 2138/3665 cut-off events. For 185606/185606 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23345 event pairs, 394 based on Foata normal form. 4/3667 useless extension candidates. Maximal degree in co-relation 22345. Up to 3168 conditions per place. [2024-06-27 19:32:33,107 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 309 selfloop transitions, 47 changer transitions 0/364 dead transitions. [2024-06-27 19:32:33,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 364 transitions, 5096 flow [2024-06-27 19:32:33,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:32:33,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:32:33,108 INFO L175 Difference]: Start difference. First operand has 263 places, 346 transitions, 4340 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:32:33,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 364 transitions, 5096 flow [2024-06-27 19:32:33,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 364 transitions, 4958 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:33,664 INFO L231 Difference]: Finished difference. Result has 265 places, 346 transitions, 4304 flow [2024-06-27 19:32:33,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4202, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4304, PETRI_PLACES=265, PETRI_TRANSITIONS=346} [2024-06-27 19:32:33,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-27 19:32:33,665 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 346 transitions, 4304 flow [2024-06-27 19:32:33,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:33,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:33,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:33,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:32:33,665 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)] === [2024-06-27 19:32:33,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:33,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1317966559, now seen corresponding path program 1 times [2024-06-27 19:32:33,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:33,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278802994] [2024-06-27 19:32:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:33,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:33,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:33,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278802994] [2024-06-27 19:32:33,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278802994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:33,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:33,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:33,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324341887] [2024-06-27 19:32:33,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:33,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:33,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:33,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:33,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:33,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:33,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 346 transitions, 4304 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:33,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:33,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:33,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:34,393 INFO L124 PetriNetUnfolderBase]: 2151/3689 cut-off events. [2024-06-27 19:32:34,393 INFO L125 PetriNetUnfolderBase]: For 188417/188423 co-relation queries the response was YES. [2024-06-27 19:32:34,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22669 conditions, 3689 events. 2151/3689 cut-off events. For 188417/188423 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23579 event pairs, 418 based on Foata normal form. 5/3690 useless extension candidates. Maximal degree in co-relation 22543. Up to 3204 conditions per place. [2024-06-27 19:32:34,431 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 292 selfloop transitions, 73 changer transitions 0/373 dead transitions. [2024-06-27 19:32:34,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 373 transitions, 5300 flow [2024-06-27 19:32:34,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:32:34,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:32:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-27 19:32:34,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5536585365853659 [2024-06-27 19:32:34,433 INFO L175 Difference]: Start difference. First operand has 265 places, 346 transitions, 4304 flow. Second operand 10 states and 227 transitions. [2024-06-27 19:32:34,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 373 transitions, 5300 flow [2024-06-27 19:32:35,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 373 transitions, 5187 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:35,040 INFO L231 Difference]: Finished difference. Result has 271 places, 352 transitions, 4448 flow [2024-06-27 19:32:35,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4191, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4448, PETRI_PLACES=271, PETRI_TRANSITIONS=352} [2024-06-27 19:32:35,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-27 19:32:35,040 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 352 transitions, 4448 flow [2024-06-27 19:32:35,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:35,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:35,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:35,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:32:35,041 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)] === [2024-06-27 19:32:35,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:35,041 INFO L85 PathProgramCache]: Analyzing trace with hash -908945165, now seen corresponding path program 2 times [2024-06-27 19:32:35,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:35,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538941157] [2024-06-27 19:32:35,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:35,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:35,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:35,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538941157] [2024-06-27 19:32:35,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538941157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:35,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:35,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:35,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100352422] [2024-06-27 19:32:35,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:35,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:35,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:35,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:35,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:35,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:35,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 352 transitions, 4448 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:35,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:35,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:35,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:35,652 INFO L124 PetriNetUnfolderBase]: 2180/3731 cut-off events. [2024-06-27 19:32:35,652 INFO L125 PetriNetUnfolderBase]: For 202023/202029 co-relation queries the response was YES. [2024-06-27 19:32:35,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23275 conditions, 3731 events. 2180/3731 cut-off events. For 202023/202029 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 23869 event pairs, 443 based on Foata normal form. 5/3729 useless extension candidates. Maximal degree in co-relation 23147. Up to 3077 conditions per place. [2024-06-27 19:32:35,693 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 238 selfloop transitions, 137 changer transitions 0/383 dead transitions. [2024-06-27 19:32:35,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 383 transitions, 5686 flow [2024-06-27 19:32:35,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:35,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:32:35,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-27 19:32:35,694 INFO L175 Difference]: Start difference. First operand has 271 places, 352 transitions, 4448 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:32:35,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 383 transitions, 5686 flow [2024-06-27 19:32:36,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 383 transitions, 5501 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:36,383 INFO L231 Difference]: Finished difference. Result has 271 places, 364 transitions, 4725 flow [2024-06-27 19:32:36,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4263, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4725, PETRI_PLACES=271, PETRI_TRANSITIONS=364} [2024-06-27 19:32:36,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-27 19:32:36,384 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 364 transitions, 4725 flow [2024-06-27 19:32:36,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:36,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:36,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:36,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:32:36,384 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)] === [2024-06-27 19:32:36,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:36,385 INFO L85 PathProgramCache]: Analyzing trace with hash -525160205, now seen corresponding path program 3 times [2024-06-27 19:32:36,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:36,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554350201] [2024-06-27 19:32:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:36,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:36,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:36,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554350201] [2024-06-27 19:32:36,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554350201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:36,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:36,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:36,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715218005] [2024-06-27 19:32:36,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:36,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:36,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:36,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:36,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:36,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:36,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 364 transitions, 4725 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:36,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:36,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:36,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:37,005 INFO L124 PetriNetUnfolderBase]: 2185/3740 cut-off events. [2024-06-27 19:32:37,005 INFO L125 PetriNetUnfolderBase]: For 207964/207970 co-relation queries the response was YES. [2024-06-27 19:32:37,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23564 conditions, 3740 events. 2185/3740 cut-off events. For 207964/207970 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 23932 event pairs, 443 based on Foata normal form. 5/3738 useless extension candidates. Maximal degree in co-relation 23435. Up to 3083 conditions per place. [2024-06-27 19:32:37,051 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 242 selfloop transitions, 134 changer transitions 0/384 dead transitions. [2024-06-27 19:32:37,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 384 transitions, 5963 flow [2024-06-27 19:32:37,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:37,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:32:37,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-27 19:32:37,052 INFO L175 Difference]: Start difference. First operand has 271 places, 364 transitions, 4725 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:32:37,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 384 transitions, 5963 flow [2024-06-27 19:32:37,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 384 transitions, 5745 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:37,727 INFO L231 Difference]: Finished difference. Result has 275 places, 367 transitions, 4831 flow [2024-06-27 19:32:37,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4516, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4831, PETRI_PLACES=275, PETRI_TRANSITIONS=367} [2024-06-27 19:32:37,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-27 19:32:37,727 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 367 transitions, 4831 flow [2024-06-27 19:32:37,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:37,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:37,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:37,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:32:37,728 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)] === [2024-06-27 19:32:37,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:37,729 INFO L85 PathProgramCache]: Analyzing trace with hash -524714735, now seen corresponding path program 4 times [2024-06-27 19:32:37,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:37,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460928376] [2024-06-27 19:32:37,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:37,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:37,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:37,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460928376] [2024-06-27 19:32:37,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460928376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:37,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:37,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:37,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785618682] [2024-06-27 19:32:37,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:37,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:37,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:37,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:37,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:37,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:37,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 367 transitions, 4831 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:37,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:37,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:37,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:38,461 INFO L124 PetriNetUnfolderBase]: 2182/3724 cut-off events. [2024-06-27 19:32:38,461 INFO L125 PetriNetUnfolderBase]: For 211367/211367 co-relation queries the response was YES. [2024-06-27 19:32:38,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23552 conditions, 3724 events. 2182/3724 cut-off events. For 211367/211367 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 23758 event pairs, 446 based on Foata normal form. 1/3718 useless extension candidates. Maximal degree in co-relation 23422. Up to 3080 conditions per place. [2024-06-27 19:32:38,500 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 232 selfloop transitions, 147 changer transitions 0/387 dead transitions. [2024-06-27 19:32:38,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 387 transitions, 5905 flow [2024-06-27 19:32:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:38,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:32:38,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 19:32:38,501 INFO L175 Difference]: Start difference. First operand has 275 places, 367 transitions, 4831 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:32:38,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 387 transitions, 5905 flow [2024-06-27 19:32:39,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 387 transitions, 5562 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:39,220 INFO L231 Difference]: Finished difference. Result has 279 places, 367 transitions, 4788 flow [2024-06-27 19:32:39,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4488, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4788, PETRI_PLACES=279, PETRI_TRANSITIONS=367} [2024-06-27 19:32:39,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-27 19:32:39,220 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 367 transitions, 4788 flow [2024-06-27 19:32:39,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:39,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:39,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:39,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:32:39,221 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)] === [2024-06-27 19:32:39,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:39,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1082165499, now seen corresponding path program 5 times [2024-06-27 19:32:39,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:39,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990713735] [2024-06-27 19:32:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:39,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:39,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:39,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990713735] [2024-06-27 19:32:39,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990713735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:39,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:39,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:39,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755666709] [2024-06-27 19:32:39,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:39,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:39,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:39,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:39,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:39,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:39,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 367 transitions, 4788 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:39,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:39,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:39,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:39,857 INFO L124 PetriNetUnfolderBase]: 2179/3736 cut-off events. [2024-06-27 19:32:39,858 INFO L125 PetriNetUnfolderBase]: For 213839/213845 co-relation queries the response was YES. [2024-06-27 19:32:39,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23461 conditions, 3736 events. 2179/3736 cut-off events. For 213839/213845 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 23888 event pairs, 448 based on Foata normal form. 1/3731 useless extension candidates. Maximal degree in co-relation 23331. Up to 3077 conditions per place. [2024-06-27 19:32:39,921 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 236 selfloop transitions, 146 changer transitions 0/390 dead transitions. [2024-06-27 19:32:39,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 390 transitions, 6016 flow [2024-06-27 19:32:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:39,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:39,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:32:39,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-27 19:32:39,922 INFO L175 Difference]: Start difference. First operand has 279 places, 367 transitions, 4788 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:32:39,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 390 transitions, 6016 flow [2024-06-27 19:32:40,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 390 transitions, 5700 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:40,810 INFO L231 Difference]: Finished difference. Result has 279 places, 367 transitions, 4770 flow [2024-06-27 19:32:40,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4770, PETRI_PLACES=279, PETRI_TRANSITIONS=367} [2024-06-27 19:32:40,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-27 19:32:40,811 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 367 transitions, 4770 flow [2024-06-27 19:32:40,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:40,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:40,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:40,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:32:40,812 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)] === [2024-06-27 19:32:40,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:40,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1771122647, now seen corresponding path program 6 times [2024-06-27 19:32:40,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:40,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408075550] [2024-06-27 19:32:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:40,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:40,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:40,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408075550] [2024-06-27 19:32:40,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408075550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:40,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:40,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:40,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578084164] [2024-06-27 19:32:40,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:40,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:40,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:40,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:40,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:40,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:40,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 367 transitions, 4770 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:40,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:40,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:40,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:41,506 INFO L124 PetriNetUnfolderBase]: 2184/3747 cut-off events. [2024-06-27 19:32:41,506 INFO L125 PetriNetUnfolderBase]: For 219170/219176 co-relation queries the response was YES. [2024-06-27 19:32:41,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23561 conditions, 3747 events. 2184/3747 cut-off events. For 219170/219176 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24039 event pairs, 419 based on Foata normal form. 5/3748 useless extension candidates. Maximal degree in co-relation 23430. Up to 3252 conditions per place. [2024-06-27 19:32:41,547 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 309 selfloop transitions, 73 changer transitions 0/390 dead transitions. [2024-06-27 19:32:41,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 390 transitions, 5760 flow [2024-06-27 19:32:41,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:41,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-27 19:32:41,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-27 19:32:41,548 INFO L175 Difference]: Start difference. First operand has 279 places, 367 transitions, 4770 flow. Second operand 9 states and 208 transitions. [2024-06-27 19:32:41,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 390 transitions, 5760 flow [2024-06-27 19:32:42,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 390 transitions, 5298 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:42,440 INFO L231 Difference]: Finished difference. Result has 281 places, 370 transitions, 4500 flow [2024-06-27 19:32:42,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4317, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4500, PETRI_PLACES=281, PETRI_TRANSITIONS=370} [2024-06-27 19:32:42,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-27 19:32:42,441 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 370 transitions, 4500 flow [2024-06-27 19:32:42,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:42,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:42,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:42,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:32:42,441 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)] === [2024-06-27 19:32:42,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:42,442 INFO L85 PathProgramCache]: Analyzing trace with hash -266807313, now seen corresponding path program 7 times [2024-06-27 19:32:42,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:42,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604024429] [2024-06-27 19:32:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:42,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:42,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:42,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604024429] [2024-06-27 19:32:42,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604024429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:42,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:42,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:42,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714869116] [2024-06-27 19:32:42,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:42,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:42,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:42,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:42,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:42,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:42,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 370 transitions, 4500 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:42,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:42,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:42,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:43,115 INFO L124 PetriNetUnfolderBase]: 2181/3743 cut-off events. [2024-06-27 19:32:43,115 INFO L125 PetriNetUnfolderBase]: For 219952/219958 co-relation queries the response was YES. [2024-06-27 19:32:43,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23273 conditions, 3743 events. 2181/3743 cut-off events. For 219952/219958 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 23999 event pairs, 419 based on Foata normal form. 5/3744 useless extension candidates. Maximal degree in co-relation 23142. Up to 3249 conditions per place. [2024-06-27 19:32:43,160 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 307 selfloop transitions, 72 changer transitions 0/387 dead transitions. [2024-06-27 19:32:43,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 387 transitions, 5300 flow [2024-06-27 19:32:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:32:43,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-27 19:32:43,161 INFO L175 Difference]: Start difference. First operand has 281 places, 370 transitions, 4500 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:32:43,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 387 transitions, 5300 flow [2024-06-27 19:32:43,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 387 transitions, 5134 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:43,802 INFO L231 Difference]: Finished difference. Result has 281 places, 370 transitions, 4484 flow [2024-06-27 19:32:43,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4334, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4484, PETRI_PLACES=281, PETRI_TRANSITIONS=370} [2024-06-27 19:32:43,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-27 19:32:43,803 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 370 transitions, 4484 flow [2024-06-27 19:32:43,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:43,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:43,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:43,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:32:43,803 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)] === [2024-06-27 19:32:43,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:43,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1250519927, now seen corresponding path program 8 times [2024-06-27 19:32:43,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:43,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910986653] [2024-06-27 19:32:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:43,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:43,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:43,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910986653] [2024-06-27 19:32:43,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910986653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:43,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:43,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:43,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141336292] [2024-06-27 19:32:43,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:43,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:43,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:43,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:43,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:43,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:43,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 370 transitions, 4484 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:43,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:43,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:43,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:44,484 INFO L124 PetriNetUnfolderBase]: 2202/3778 cut-off events. [2024-06-27 19:32:44,484 INFO L125 PetriNetUnfolderBase]: For 231039/231045 co-relation queries the response was YES. [2024-06-27 19:32:44,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23685 conditions, 3778 events. 2202/3778 cut-off events. For 231039/231045 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 24286 event pairs, 419 based on Foata normal form. 5/3779 useless extension candidates. Maximal degree in co-relation 23553. Up to 3137 conditions per place. [2024-06-27 19:32:44,529 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 248 selfloop transitions, 151 changer transitions 0/407 dead transitions. [2024-06-27 19:32:44,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 407 transitions, 5911 flow [2024-06-27 19:32:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:44,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-27 19:32:44,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962059620596206 [2024-06-27 19:32:44,530 INFO L175 Difference]: Start difference. First operand has 281 places, 370 transitions, 4484 flow. Second operand 9 states and 220 transitions. [2024-06-27 19:32:44,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 407 transitions, 5911 flow [2024-06-27 19:32:45,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 407 transitions, 5767 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:45,177 INFO L231 Difference]: Finished difference. Result has 284 places, 379 transitions, 4787 flow [2024-06-27 19:32:45,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4340, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4787, PETRI_PLACES=284, PETRI_TRANSITIONS=379} [2024-06-27 19:32:45,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-27 19:32:45,178 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 379 transitions, 4787 flow [2024-06-27 19:32:45,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:45,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:45,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:45,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:32:45,178 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)] === [2024-06-27 19:32:45,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:45,178 INFO L85 PathProgramCache]: Analyzing trace with hash 289536977, now seen corresponding path program 9 times [2024-06-27 19:32:45,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:45,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602681752] [2024-06-27 19:32:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:45,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:45,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:45,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602681752] [2024-06-27 19:32:45,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602681752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:45,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:45,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:45,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521237145] [2024-06-27 19:32:45,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:45,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:45,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:45,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:45,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:45,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:45,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 379 transitions, 4787 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:45,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:45,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:45,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:45,940 INFO L124 PetriNetUnfolderBase]: 2207/3775 cut-off events. [2024-06-27 19:32:45,941 INFO L125 PetriNetUnfolderBase]: For 238000/238000 co-relation queries the response was YES. [2024-06-27 19:32:45,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24055 conditions, 3775 events. 2207/3775 cut-off events. For 238000/238000 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24249 event pairs, 422 based on Foata normal form. 1/3770 useless extension candidates. Maximal degree in co-relation 23922. Up to 3273 conditions per place. [2024-06-27 19:32:45,981 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 311 selfloop transitions, 78 changer transitions 0/397 dead transitions. [2024-06-27 19:32:45,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 397 transitions, 5648 flow [2024-06-27 19:32:45,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:45,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:45,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:32:45,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-27 19:32:45,982 INFO L175 Difference]: Start difference. First operand has 284 places, 379 transitions, 4787 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:32:45,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 397 transitions, 5648 flow [2024-06-27 19:32:46,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 397 transitions, 5280 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:46,908 INFO L231 Difference]: Finished difference. Result has 285 places, 382 transitions, 4634 flow [2024-06-27 19:32:46,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4634, PETRI_PLACES=285, PETRI_TRANSITIONS=382} [2024-06-27 19:32:46,908 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-27 19:32:46,908 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 382 transitions, 4634 flow [2024-06-27 19:32:46,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:46,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:46,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:46,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:32:46,909 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)] === [2024-06-27 19:32:46,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:46,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1920996335, now seen corresponding path program 10 times [2024-06-27 19:32:46,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:46,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883497674] [2024-06-27 19:32:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:46,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:46,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:46,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883497674] [2024-06-27 19:32:46,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883497674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:46,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:46,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:46,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131956495] [2024-06-27 19:32:46,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:46,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:46,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:46,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:47,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:47,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:47,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 382 transitions, 4634 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:47,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:47,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:47,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:47,585 INFO L124 PetriNetUnfolderBase]: 2204/3777 cut-off events. [2024-06-27 19:32:47,586 INFO L125 PetriNetUnfolderBase]: For 235479/235485 co-relation queries the response was YES. [2024-06-27 19:32:47,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23691 conditions, 3777 events. 2204/3777 cut-off events. For 235479/235485 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24311 event pairs, 443 based on Foata normal form. 5/3775 useless extension candidates. Maximal degree in co-relation 23558. Up to 3140 conditions per place. [2024-06-27 19:32:47,632 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 259 selfloop transitions, 133 changer transitions 0/400 dead transitions. [2024-06-27 19:32:47,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 400 transitions, 5750 flow [2024-06-27 19:32:47,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:32:47,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-27 19:32:47,633 INFO L175 Difference]: Start difference. First operand has 285 places, 382 transitions, 4634 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:32:47,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 400 transitions, 5750 flow [2024-06-27 19:32:48,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 400 transitions, 5572 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:48,567 INFO L231 Difference]: Finished difference. Result has 285 places, 382 transitions, 4729 flow [2024-06-27 19:32:48,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4456, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4729, PETRI_PLACES=285, PETRI_TRANSITIONS=382} [2024-06-27 19:32:48,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-27 19:32:48,568 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 382 transitions, 4729 flow [2024-06-27 19:32:48,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:48,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:48,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:48,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:32:48,568 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)] === [2024-06-27 19:32:48,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:48,569 INFO L85 PathProgramCache]: Analyzing trace with hash 280817297, now seen corresponding path program 11 times [2024-06-27 19:32:48,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:48,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127427885] [2024-06-27 19:32:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:48,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:48,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:48,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127427885] [2024-06-27 19:32:48,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127427885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:48,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:48,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:48,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680165229] [2024-06-27 19:32:48,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:48,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:48,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:48,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:48,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:48,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:48,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 382 transitions, 4729 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:48,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:48,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:48,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:49,256 INFO L124 PetriNetUnfolderBase]: 2201/3779 cut-off events. [2024-06-27 19:32:49,256 INFO L125 PetriNetUnfolderBase]: For 237887/237893 co-relation queries the response was YES. [2024-06-27 19:32:49,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23823 conditions, 3779 events. 2201/3779 cut-off events. For 237887/237893 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24360 event pairs, 419 based on Foata normal form. 5/3780 useless extension candidates. Maximal degree in co-relation 23689. Up to 3137 conditions per place. [2024-06-27 19:32:49,301 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 149 changer transitions 0/412 dead transitions. [2024-06-27 19:32:49,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 412 transitions, 6049 flow [2024-06-27 19:32:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:32:49,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:32:49,302 INFO L175 Difference]: Start difference. First operand has 285 places, 382 transitions, 4729 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:32:49,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 412 transitions, 6049 flow [2024-06-27 19:32:50,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 412 transitions, 5757 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:50,108 INFO L231 Difference]: Finished difference. Result has 289 places, 382 transitions, 4746 flow [2024-06-27 19:32:50,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4437, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4746, PETRI_PLACES=289, PETRI_TRANSITIONS=382} [2024-06-27 19:32:50,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-27 19:32:50,109 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 382 transitions, 4746 flow [2024-06-27 19:32:50,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:50,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:50,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:50,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:32:50,109 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)] === [2024-06-27 19:32:50,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:50,109 INFO L85 PathProgramCache]: Analyzing trace with hash 294632447, now seen corresponding path program 12 times [2024-06-27 19:32:50,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:50,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694666490] [2024-06-27 19:32:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:50,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:50,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:50,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:50,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694666490] [2024-06-27 19:32:50,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694666490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:50,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:50,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:50,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370418848] [2024-06-27 19:32:50,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:50,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:50,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:50,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:50,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:50,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:50,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 382 transitions, 4746 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:50,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:50,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:50,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:50,879 INFO L124 PetriNetUnfolderBase]: 2214/3790 cut-off events. [2024-06-27 19:32:50,880 INFO L125 PetriNetUnfolderBase]: For 247085/247085 co-relation queries the response was YES. [2024-06-27 19:32:50,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24147 conditions, 3790 events. 2214/3790 cut-off events. For 247085/247085 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24372 event pairs, 421 based on Foata normal form. 1/3785 useless extension candidates. Maximal degree in co-relation 24012. Up to 3276 conditions per place. [2024-06-27 19:32:50,921 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 314 selfloop transitions, 85 changer transitions 0/407 dead transitions. [2024-06-27 19:32:50,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 407 transitions, 5836 flow [2024-06-27 19:32:50,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:32:50,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:32:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-27 19:32:50,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432372505543237 [2024-06-27 19:32:50,922 INFO L175 Difference]: Start difference. First operand has 289 places, 382 transitions, 4746 flow. Second operand 11 states and 245 transitions. [2024-06-27 19:32:50,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 407 transitions, 5836 flow [2024-06-27 19:32:51,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 407 transitions, 5510 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:32:51,751 INFO L231 Difference]: Finished difference. Result has 293 places, 388 transitions, 4718 flow [2024-06-27 19:32:51,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4434, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4718, PETRI_PLACES=293, PETRI_TRANSITIONS=388} [2024-06-27 19:32:51,752 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-27 19:32:51,752 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 388 transitions, 4718 flow [2024-06-27 19:32:51,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:51,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:51,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:51,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:32:51,752 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)] === [2024-06-27 19:32:51,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:51,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1744620163, now seen corresponding path program 13 times [2024-06-27 19:32:51,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:51,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434295566] [2024-06-27 19:32:51,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:51,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:51,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:51,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434295566] [2024-06-27 19:32:51,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434295566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:51,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:51,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:51,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193004956] [2024-06-27 19:32:51,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:51,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:51,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:51,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:51,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:51,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:51,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 388 transitions, 4718 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:51,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:51,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:51,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:52,491 INFO L124 PetriNetUnfolderBase]: 2211/3786 cut-off events. [2024-06-27 19:32:52,491 INFO L125 PetriNetUnfolderBase]: For 243591/243591 co-relation queries the response was YES. [2024-06-27 19:32:52,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23876 conditions, 3786 events. 2211/3786 cut-off events. For 243591/243591 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24365 event pairs, 421 based on Foata normal form. 1/3781 useless extension candidates. Maximal degree in co-relation 23740. Up to 3273 conditions per place. [2024-06-27 19:32:52,536 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 315 selfloop transitions, 85 changer transitions 0/408 dead transitions. [2024-06-27 19:32:52,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 408 transitions, 5564 flow [2024-06-27 19:32:52,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:32:52,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:32:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 283 transitions. [2024-06-27 19:32:52,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5309568480300187 [2024-06-27 19:32:52,537 INFO L175 Difference]: Start difference. First operand has 293 places, 388 transitions, 4718 flow. Second operand 13 states and 283 transitions. [2024-06-27 19:32:52,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 408 transitions, 5564 flow [2024-06-27 19:32:53,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 408 transitions, 5354 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 19:32:53,410 INFO L231 Difference]: Finished difference. Result has 298 places, 388 transitions, 4684 flow [2024-06-27 19:32:53,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4508, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4684, PETRI_PLACES=298, PETRI_TRANSITIONS=388} [2024-06-27 19:32:53,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-27 19:32:53,410 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 388 transitions, 4684 flow [2024-06-27 19:32:53,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:53,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:53,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:53,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:32:53,411 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)] === [2024-06-27 19:32:53,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:53,411 INFO L85 PathProgramCache]: Analyzing trace with hash 818508863, now seen corresponding path program 14 times [2024-06-27 19:32:53,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:53,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422131965] [2024-06-27 19:32:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:53,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:53,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:53,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422131965] [2024-06-27 19:32:53,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422131965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:53,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:53,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:53,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144673113] [2024-06-27 19:32:53,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:53,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:53,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:53,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:53,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:53,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:53,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 388 transitions, 4684 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:53,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:53,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:53,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:54,178 INFO L124 PetriNetUnfolderBase]: 2208/3793 cut-off events. [2024-06-27 19:32:54,178 INFO L125 PetriNetUnfolderBase]: For 246533/246539 co-relation queries the response was YES. [2024-06-27 19:32:54,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23823 conditions, 3793 events. 2208/3793 cut-off events. For 246533/246539 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24492 event pairs, 417 based on Foata normal form. 5/3794 useless extension candidates. Maximal degree in co-relation 23686. Up to 3146 conditions per place. [2024-06-27 19:32:54,222 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 247 selfloop transitions, 160 changer transitions 0/415 dead transitions. [2024-06-27 19:32:54,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 415 transitions, 5714 flow [2024-06-27 19:32:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:32:54,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:32:54,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-27 19:32:54,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780487804878048 [2024-06-27 19:32:54,223 INFO L175 Difference]: Start difference. First operand has 298 places, 388 transitions, 4684 flow. Second operand 10 states and 237 transitions. [2024-06-27 19:32:54,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 415 transitions, 5714 flow [2024-06-27 19:32:55,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 415 transitions, 5524 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-27 19:32:55,106 INFO L231 Difference]: Finished difference. Result has 296 places, 388 transitions, 4824 flow [2024-06-27 19:32:55,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4494, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4824, PETRI_PLACES=296, PETRI_TRANSITIONS=388} [2024-06-27 19:32:55,107 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-27 19:32:55,107 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 388 transitions, 4824 flow [2024-06-27 19:32:55,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:55,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:55,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:55,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:32:55,107 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)] === [2024-06-27 19:32:55,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:55,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1413599209, now seen corresponding path program 15 times [2024-06-27 19:32:55,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:55,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510178337] [2024-06-27 19:32:55,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:55,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:55,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:55,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510178337] [2024-06-27 19:32:55,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510178337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:55,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:55,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:55,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351530278] [2024-06-27 19:32:55,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:55,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:55,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:55,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:55,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:55,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:55,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 388 transitions, 4824 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:55,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:55,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:55,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:55,791 INFO L124 PetriNetUnfolderBase]: 2205/3787 cut-off events. [2024-06-27 19:32:55,791 INFO L125 PetriNetUnfolderBase]: For 248410/248410 co-relation queries the response was YES. [2024-06-27 19:32:55,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23997 conditions, 3787 events. 2205/3787 cut-off events. For 248410/248410 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24406 event pairs, 398 based on Foata normal form. 1/3786 useless extension candidates. Maximal degree in co-relation 23859. Up to 3289 conditions per place. [2024-06-27 19:32:55,838 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 348 selfloop transitions, 56 changer transitions 0/412 dead transitions. [2024-06-27 19:32:55,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 412 transitions, 5870 flow [2024-06-27 19:32:55,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 19:32:55,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-27 19:32:55,839 INFO L175 Difference]: Start difference. First operand has 296 places, 388 transitions, 4824 flow. Second operand 6 states and 159 transitions. [2024-06-27 19:32:55,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 412 transitions, 5870 flow [2024-06-27 19:32:56,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 412 transitions, 5498 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-27 19:32:56,888 INFO L231 Difference]: Finished difference. Result has 294 places, 389 transitions, 4634 flow [2024-06-27 19:32:56,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4456, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4634, PETRI_PLACES=294, PETRI_TRANSITIONS=389} [2024-06-27 19:32:56,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-27 19:32:56,888 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 389 transitions, 4634 flow [2024-06-27 19:32:56,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:56,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:56,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:56,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:32:56,889 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)] === [2024-06-27 19:32:56,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:56,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1358711169, now seen corresponding path program 16 times [2024-06-27 19:32:56,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:56,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684665261] [2024-06-27 19:32:56,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:56,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:56,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:56,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684665261] [2024-06-27 19:32:56,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684665261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:56,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:56,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:56,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904735577] [2024-06-27 19:32:56,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:56,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:56,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:56,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:56,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:57,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:57,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 389 transitions, 4634 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:57,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:57,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:57,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:57,678 INFO L124 PetriNetUnfolderBase]: 2202/3774 cut-off events. [2024-06-27 19:32:57,678 INFO L125 PetriNetUnfolderBase]: For 246855/246855 co-relation queries the response was YES. [2024-06-27 19:32:57,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23697 conditions, 3774 events. 2202/3774 cut-off events. For 246855/246855 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24291 event pairs, 420 based on Foata normal form. 1/3769 useless extension candidates. Maximal degree in co-relation 23557. Up to 3140 conditions per place. [2024-06-27 19:32:57,720 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 248 selfloop transitions, 159 changer transitions 0/415 dead transitions. [2024-06-27 19:32:57,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 415 transitions, 5814 flow [2024-06-27 19:32:57,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:32:57,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:32:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-27 19:32:57,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565410199556541 [2024-06-27 19:32:57,721 INFO L175 Difference]: Start difference. First operand has 294 places, 389 transitions, 4634 flow. Second operand 11 states and 255 transitions. [2024-06-27 19:32:57,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 415 transitions, 5814 flow [2024-06-27 19:32:58,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 415 transitions, 5755 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:58,851 INFO L231 Difference]: Finished difference. Result has 303 places, 389 transitions, 4903 flow [2024-06-27 19:32:58,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4575, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4903, PETRI_PLACES=303, PETRI_TRANSITIONS=389} [2024-06-27 19:32:58,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-27 19:32:58,851 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 389 transitions, 4903 flow [2024-06-27 19:32:58,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:58,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:58,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:58,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:32:58,852 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:58,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:58,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1411257185, now seen corresponding path program 17 times [2024-06-27 19:32:58,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:58,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156903667] [2024-06-27 19:32:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:58,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:58,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:58,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156903667] [2024-06-27 19:32:58,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156903667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:58,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:58,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:58,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981289338] [2024-06-27 19:32:58,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:58,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:58,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:58,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:58,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:58,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:58,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 389 transitions, 4903 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:58,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:58,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:58,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:59,540 INFO L124 PetriNetUnfolderBase]: 2199/3779 cut-off events. [2024-06-27 19:32:59,540 INFO L125 PetriNetUnfolderBase]: For 249086/249086 co-relation queries the response was YES. [2024-06-27 19:32:59,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23984 conditions, 3779 events. 2199/3779 cut-off events. For 249086/249086 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24324 event pairs, 398 based on Foata normal form. 1/3778 useless extension candidates. Maximal degree in co-relation 23843. Up to 3282 conditions per place. [2024-06-27 19:32:59,582 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 344 selfloop transitions, 59 changer transitions 0/411 dead transitions. [2024-06-27 19:32:59,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 411 transitions, 5765 flow [2024-06-27 19:32:59,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 19:32:59,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-27 19:32:59,583 INFO L175 Difference]: Start difference. First operand has 303 places, 389 transitions, 4903 flow. Second operand 6 states and 159 transitions. [2024-06-27 19:32:59,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 411 transitions, 5765 flow [2024-06-27 19:33:00,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 411 transitions, 5423 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-27 19:33:00,501 INFO L231 Difference]: Finished difference. Result has 300 places, 389 transitions, 4693 flow [2024-06-27 19:33:00,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4561, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4693, PETRI_PLACES=300, PETRI_TRANSITIONS=389} [2024-06-27 19:33:00,501 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-27 19:33:00,502 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 389 transitions, 4693 flow [2024-06-27 19:33:00,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:00,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:00,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:00,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:33:00,502 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:00,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:00,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1358444259, now seen corresponding path program 18 times [2024-06-27 19:33:00,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:00,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789797055] [2024-06-27 19:33:00,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:00,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:00,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:00,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789797055] [2024-06-27 19:33:00,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789797055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:00,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:00,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:00,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436948211] [2024-06-27 19:33:00,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:00,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:00,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:00,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:00,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:00,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:00,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 389 transitions, 4693 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:00,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:00,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:00,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:01,265 INFO L124 PetriNetUnfolderBase]: 2204/3779 cut-off events. [2024-06-27 19:33:01,266 INFO L125 PetriNetUnfolderBase]: For 250212/250212 co-relation queries the response was YES. [2024-06-27 19:33:01,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23742 conditions, 3779 events. 2204/3779 cut-off events. For 250212/250212 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24354 event pairs, 420 based on Foata normal form. 1/3774 useless extension candidates. Maximal degree in co-relation 23600. Up to 3143 conditions per place. [2024-06-27 19:33:01,309 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 162 changer transitions 0/419 dead transitions. [2024-06-27 19:33:01,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 419 transitions, 5770 flow [2024-06-27 19:33:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:33:01,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:33:01,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 293 transitions. [2024-06-27 19:33:01,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549718574108818 [2024-06-27 19:33:01,310 INFO L175 Difference]: Start difference. First operand has 300 places, 389 transitions, 4693 flow. Second operand 13 states and 293 transitions. [2024-06-27 19:33:01,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 419 transitions, 5770 flow [2024-06-27 19:33:02,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 419 transitions, 5487 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:33:02,341 INFO L231 Difference]: Finished difference. Result has 305 places, 392 transitions, 4781 flow [2024-06-27 19:33:02,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4781, PETRI_PLACES=305, PETRI_TRANSITIONS=392} [2024-06-27 19:33:02,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-27 19:33:02,342 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 392 transitions, 4781 flow [2024-06-27 19:33:02,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:02,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:02,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:02,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:33:02,342 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:02,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:02,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1214297419, now seen corresponding path program 19 times [2024-06-27 19:33:02,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:02,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904621683] [2024-06-27 19:33:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:02,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:02,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:02,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904621683] [2024-06-27 19:33:02,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904621683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:02,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:02,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:02,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888265407] [2024-06-27 19:33:02,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:02,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:02,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:02,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:02,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:02,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:02,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 392 transitions, 4781 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:02,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:02,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:02,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:03,104 INFO L124 PetriNetUnfolderBase]: 2201/3774 cut-off events. [2024-06-27 19:33:03,105 INFO L125 PetriNetUnfolderBase]: For 252748/252748 co-relation queries the response was YES. [2024-06-27 19:33:03,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23875 conditions, 3774 events. 2201/3774 cut-off events. For 252748/252748 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24316 event pairs, 422 based on Foata normal form. 1/3769 useless extension candidates. Maximal degree in co-relation 23732. Up to 3140 conditions per place. [2024-06-27 19:33:03,147 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 246 selfloop transitions, 159 changer transitions 0/413 dead transitions. [2024-06-27 19:33:03,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 413 transitions, 5643 flow [2024-06-27 19:33:03,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:33:03,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-27 19:33:03,148 INFO L175 Difference]: Start difference. First operand has 305 places, 392 transitions, 4781 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:33:03,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 413 transitions, 5643 flow [2024-06-27 19:33:04,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 413 transitions, 5287 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-27 19:33:04,294 INFO L231 Difference]: Finished difference. Result has 301 places, 392 transitions, 4753 flow [2024-06-27 19:33:04,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4753, PETRI_PLACES=301, PETRI_TRANSITIONS=392} [2024-06-27 19:33:04,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-27 19:33:04,295 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 392 transitions, 4753 flow [2024-06-27 19:33:04,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:04,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:04,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:04,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:33:04,295 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:04,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:04,296 INFO L85 PathProgramCache]: Analyzing trace with hash 660354255, now seen corresponding path program 1 times [2024-06-27 19:33:04,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:04,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51572272] [2024-06-27 19:33:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:04,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:04,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:04,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51572272] [2024-06-27 19:33:04,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51572272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:04,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:04,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:04,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592334286] [2024-06-27 19:33:04,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:04,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:04,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:04,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:04,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:04,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:04,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 392 transitions, 4753 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:04,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:04,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:04,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:05,053 INFO L124 PetriNetUnfolderBase]: 2320/3976 cut-off events. [2024-06-27 19:33:05,053 INFO L125 PetriNetUnfolderBase]: For 332653/332653 co-relation queries the response was YES. [2024-06-27 19:33:05,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26202 conditions, 3976 events. 2320/3976 cut-off events. For 332653/332653 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 25823 event pairs, 447 based on Foata normal form. 12/3981 useless extension candidates. Maximal degree in co-relation 26059. Up to 2982 conditions per place. [2024-06-27 19:33:05,101 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 233 selfloop transitions, 185 changer transitions 0/426 dead transitions. [2024-06-27 19:33:05,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 426 transitions, 5939 flow [2024-06-27 19:33:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:05,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:33:05,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-27 19:33:05,102 INFO L175 Difference]: Start difference. First operand has 301 places, 392 transitions, 4753 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:33:05,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 426 transitions, 5939 flow [2024-06-27 19:33:06,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 426 transitions, 5617 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:06,287 INFO L231 Difference]: Finished difference. Result has 302 places, 396 transitions, 4912 flow [2024-06-27 19:33:06,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4912, PETRI_PLACES=302, PETRI_TRANSITIONS=396} [2024-06-27 19:33:06,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-27 19:33:06,288 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 396 transitions, 4912 flow [2024-06-27 19:33:06,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:06,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:06,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:06,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:33:06,289 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:06,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:06,290 INFO L85 PathProgramCache]: Analyzing trace with hash -675914799, now seen corresponding path program 2 times [2024-06-27 19:33:06,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:06,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163558738] [2024-06-27 19:33:06,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:06,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:06,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:06,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163558738] [2024-06-27 19:33:06,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163558738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:06,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:06,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:06,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758364374] [2024-06-27 19:33:06,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:06,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:06,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:06,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:06,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:06,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:06,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 396 transitions, 4912 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:06,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:06,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:06,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:07,236 INFO L124 PetriNetUnfolderBase]: 2452/4175 cut-off events. [2024-06-27 19:33:07,236 INFO L125 PetriNetUnfolderBase]: For 387914/387914 co-relation queries the response was YES. [2024-06-27 19:33:07,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29117 conditions, 4175 events. 2452/4175 cut-off events. For 387914/387914 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 27153 event pairs, 518 based on Foata normal form. 12/4180 useless extension candidates. Maximal degree in co-relation 28973. Up to 3336 conditions per place. [2024-06-27 19:33:07,290 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 241 selfloop transitions, 177 changer transitions 0/426 dead transitions. [2024-06-27 19:33:07,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 426 transitions, 6096 flow [2024-06-27 19:33:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:33:07,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-27 19:33:07,293 INFO L175 Difference]: Start difference. First operand has 302 places, 396 transitions, 4912 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:33:07,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 426 transitions, 6096 flow [2024-06-27 19:33:08,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 426 transitions, 5823 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:08,617 INFO L231 Difference]: Finished difference. Result has 305 places, 400 transitions, 5110 flow [2024-06-27 19:33:08,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4651, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5110, PETRI_PLACES=305, PETRI_TRANSITIONS=400} [2024-06-27 19:33:08,617 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-27 19:33:08,617 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 400 transitions, 5110 flow [2024-06-27 19:33:08,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:08,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:08,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:08,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:33:08,618 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:08,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:08,618 INFO L85 PathProgramCache]: Analyzing trace with hash -675766929, now seen corresponding path program 3 times [2024-06-27 19:33:08,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:08,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783806741] [2024-06-27 19:33:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:08,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:08,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:08,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783806741] [2024-06-27 19:33:08,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783806741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:08,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:08,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:08,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640027388] [2024-06-27 19:33:08,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:08,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:08,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:08,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:08,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:08,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:08,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 400 transitions, 5110 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:08,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:08,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:08,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:09,403 INFO L124 PetriNetUnfolderBase]: 2416/4123 cut-off events. [2024-06-27 19:33:09,403 INFO L125 PetriNetUnfolderBase]: For 357005/357005 co-relation queries the response was YES. [2024-06-27 19:33:09,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27724 conditions, 4123 events. 2416/4123 cut-off events. For 357005/357005 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 26822 event pairs, 514 based on Foata normal form. 16/4132 useless extension candidates. Maximal degree in co-relation 27579. Up to 3380 conditions per place. [2024-06-27 19:33:09,456 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 241 selfloop transitions, 173 changer transitions 0/422 dead transitions. [2024-06-27 19:33:09,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 422 transitions, 6006 flow [2024-06-27 19:33:09,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:09,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:33:09,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-27 19:33:09,457 INFO L175 Difference]: Start difference. First operand has 305 places, 400 transitions, 5110 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:33:09,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 422 transitions, 6006 flow [2024-06-27 19:33:10,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 422 transitions, 5747 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:10,682 INFO L231 Difference]: Finished difference. Result has 309 places, 400 transitions, 5203 flow [2024-06-27 19:33:10,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4851, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5203, PETRI_PLACES=309, PETRI_TRANSITIONS=400} [2024-06-27 19:33:10,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-27 19:33:10,683 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 400 transitions, 5203 flow [2024-06-27 19:33:10,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:10,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:10,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:10,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:33:10,683 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:10,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:10,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1920540945, now seen corresponding path program 4 times [2024-06-27 19:33:10,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:10,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017753217] [2024-06-27 19:33:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:10,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:10,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:10,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017753217] [2024-06-27 19:33:10,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017753217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:10,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:10,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:10,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901795778] [2024-06-27 19:33:10,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:10,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:10,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:10,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:10,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:10,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:10,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 400 transitions, 5203 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:10,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:10,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:10,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:11,570 INFO L124 PetriNetUnfolderBase]: 2472/4227 cut-off events. [2024-06-27 19:33:11,570 INFO L125 PetriNetUnfolderBase]: For 364085/364085 co-relation queries the response was YES. [2024-06-27 19:33:11,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28512 conditions, 4227 events. 2472/4227 cut-off events. For 364085/364085 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 27699 event pairs, 493 based on Foata normal form. 16/4237 useless extension candidates. Maximal degree in co-relation 28365. Up to 3630 conditions per place. [2024-06-27 19:33:11,623 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 335 selfloop transitions, 78 changer transitions 0/421 dead transitions. [2024-06-27 19:33:11,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 421 transitions, 6141 flow [2024-06-27 19:33:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:33:11,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-27 19:33:11,624 INFO L175 Difference]: Start difference. First operand has 309 places, 400 transitions, 5203 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:33:11,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 421 transitions, 6141 flow [2024-06-27 19:33:13,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 421 transitions, 5787 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:13,065 INFO L231 Difference]: Finished difference. Result has 310 places, 402 transitions, 5067 flow [2024-06-27 19:33:13,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4849, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5067, PETRI_PLACES=310, PETRI_TRANSITIONS=402} [2024-06-27 19:33:13,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-27 19:33:13,065 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 402 transitions, 5067 flow [2024-06-27 19:33:13,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:13,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:13,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:13,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:33:13,066 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:13,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:13,066 INFO L85 PathProgramCache]: Analyzing trace with hash 27978989, now seen corresponding path program 5 times [2024-06-27 19:33:13,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:13,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036131331] [2024-06-27 19:33:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:13,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:13,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:13,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036131331] [2024-06-27 19:33:13,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036131331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:13,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:13,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:13,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583315819] [2024-06-27 19:33:13,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:13,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:13,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:13,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:13,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:13,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:13,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 402 transitions, 5067 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:13,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:13,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:13,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:13,954 INFO L124 PetriNetUnfolderBase]: 2604/4431 cut-off events. [2024-06-27 19:33:13,954 INFO L125 PetriNetUnfolderBase]: For 417007/417007 co-relation queries the response was YES. [2024-06-27 19:33:13,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31181 conditions, 4431 events. 2604/4431 cut-off events. For 417007/417007 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 29102 event pairs, 513 based on Foata normal form. 12/4437 useless extension candidates. Maximal degree in co-relation 31033. Up to 3674 conditions per place. [2024-06-27 19:33:14,012 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 337 selfloop transitions, 84 changer transitions 0/429 dead transitions. [2024-06-27 19:33:14,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 429 transitions, 6259 flow [2024-06-27 19:33:14,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:14,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:33:14,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 19:33:14,013 INFO L175 Difference]: Start difference. First operand has 310 places, 402 transitions, 5067 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:33:14,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 429 transitions, 6259 flow [2024-06-27 19:33:15,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 429 transitions, 6077 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:15,463 INFO L231 Difference]: Finished difference. Result has 312 places, 406 transitions, 5174 flow [2024-06-27 19:33:15,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4885, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5174, PETRI_PLACES=312, PETRI_TRANSITIONS=406} [2024-06-27 19:33:15,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-27 19:33:15,463 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 406 transitions, 5174 flow [2024-06-27 19:33:15,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:15,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:15,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:15,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:33:15,464 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:15,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:15,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1915178565, now seen corresponding path program 6 times [2024-06-27 19:33:15,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:15,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297441013] [2024-06-27 19:33:15,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:15,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:15,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:15,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297441013] [2024-06-27 19:33:15,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297441013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:15,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:15,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:15,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052895373] [2024-06-27 19:33:15,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:15,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:15,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:15,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:15,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:15,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:15,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 406 transitions, 5174 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:15,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:15,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:15,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:16,463 INFO L124 PetriNetUnfolderBase]: 2568/4379 cut-off events. [2024-06-27 19:33:16,463 INFO L125 PetriNetUnfolderBase]: For 385139/385139 co-relation queries the response was YES. [2024-06-27 19:33:16,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29539 conditions, 4379 events. 2568/4379 cut-off events. For 385139/385139 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 28775 event pairs, 509 based on Foata normal form. 16/4389 useless extension candidates. Maximal degree in co-relation 29390. Up to 3782 conditions per place. [2024-06-27 19:33:16,513 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 340 selfloop transitions, 79 changer transitions 0/427 dead transitions. [2024-06-27 19:33:16,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 427 transitions, 6076 flow [2024-06-27 19:33:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:16,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-27 19:33:16,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585365853658537 [2024-06-27 19:33:16,514 INFO L175 Difference]: Start difference. First operand has 312 places, 406 transitions, 5174 flow. Second operand 10 states and 229 transitions. [2024-06-27 19:33:16,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 427 transitions, 6076 flow [2024-06-27 19:33:17,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 427 transitions, 5917 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:17,905 INFO L231 Difference]: Finished difference. Result has 318 places, 406 transitions, 5179 flow [2024-06-27 19:33:17,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5015, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5179, PETRI_PLACES=318, PETRI_TRANSITIONS=406} [2024-06-27 19:33:17,905 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-27 19:33:17,906 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 406 transitions, 5179 flow [2024-06-27 19:33:17,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:17,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:17,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:17,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:33:17,906 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:17,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:17,906 INFO L85 PathProgramCache]: Analyzing trace with hash 33704441, now seen corresponding path program 1 times [2024-06-27 19:33:17,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:17,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115035894] [2024-06-27 19:33:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:17,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:18,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:18,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115035894] [2024-06-27 19:33:18,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115035894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:18,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:18,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:18,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220478104] [2024-06-27 19:33:18,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:18,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:18,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:18,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:18,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:18,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:18,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 406 transitions, 5179 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:18,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:18,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:18,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:18,848 INFO L124 PetriNetUnfolderBase]: 2608/4451 cut-off events. [2024-06-27 19:33:18,848 INFO L125 PetriNetUnfolderBase]: For 377902/377902 co-relation queries the response was YES. [2024-06-27 19:33:18,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29897 conditions, 4451 events. 2608/4451 cut-off events. For 377902/377902 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29391 event pairs, 509 based on Foata normal form. 12/4457 useless extension candidates. Maximal degree in co-relation 29746. Up to 3722 conditions per place. [2024-06-27 19:33:18,911 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 338 selfloop transitions, 86 changer transitions 0/432 dead transitions. [2024-06-27 19:33:18,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 432 transitions, 6159 flow [2024-06-27 19:33:18,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-27 19:33:18,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-27 19:33:18,912 INFO L175 Difference]: Start difference. First operand has 318 places, 406 transitions, 5179 flow. Second operand 10 states and 231 transitions. [2024-06-27 19:33:18,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 432 transitions, 6159 flow [2024-06-27 19:33:20,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 432 transitions, 5985 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 19:33:20,445 INFO L231 Difference]: Finished difference. Result has 319 places, 408 transitions, 5240 flow [2024-06-27 19:33:20,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5005, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5240, PETRI_PLACES=319, PETRI_TRANSITIONS=408} [2024-06-27 19:33:20,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-27 19:33:20,446 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 408 transitions, 5240 flow [2024-06-27 19:33:20,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:20,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:20,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:20,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:33:20,446 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:20,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:20,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1411534015, now seen corresponding path program 7 times [2024-06-27 19:33:20,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:20,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012558549] [2024-06-27 19:33:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:20,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:20,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:20,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012558549] [2024-06-27 19:33:20,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012558549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:20,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:20,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:20,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993024778] [2024-06-27 19:33:20,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:20,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:20,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:20,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:20,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:20,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:20,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 408 transitions, 5240 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:20,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:20,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:20,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:21,407 INFO L124 PetriNetUnfolderBase]: 2672/4568 cut-off events. [2024-06-27 19:33:21,407 INFO L125 PetriNetUnfolderBase]: For 401585/401585 co-relation queries the response was YES. [2024-06-27 19:33:21,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30822 conditions, 4568 events. 2672/4568 cut-off events. For 401585/401585 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 30287 event pairs, 450 based on Foata normal form. 16/4582 useless extension candidates. Maximal degree in co-relation 30670. Up to 3914 conditions per place. [2024-06-27 19:33:21,469 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 367 selfloop transitions, 67 changer transitions 0/442 dead transitions. [2024-06-27 19:33:21,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 442 transitions, 6276 flow [2024-06-27 19:33:21,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:21,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 19:33:21,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-27 19:33:21,471 INFO L175 Difference]: Start difference. First operand has 319 places, 408 transitions, 5240 flow. Second operand 7 states and 186 transitions. [2024-06-27 19:33:21,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 442 transitions, 6276 flow [2024-06-27 19:33:23,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 442 transitions, 6067 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 19:33:23,317 INFO L231 Difference]: Finished difference. Result has 318 places, 412 transitions, 5265 flow [2024-06-27 19:33:23,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5031, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5265, PETRI_PLACES=318, PETRI_TRANSITIONS=412} [2024-06-27 19:33:23,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-27 19:33:23,317 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 412 transitions, 5265 flow [2024-06-27 19:33:23,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:23,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:23,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:23,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:33:23,318 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:23,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:23,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1214307339, now seen corresponding path program 8 times [2024-06-27 19:33:23,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:23,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518672983] [2024-06-27 19:33:23,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:23,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:23,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:23,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518672983] [2024-06-27 19:33:23,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518672983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:23,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:23,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:23,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908557189] [2024-06-27 19:33:23,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:23,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:23,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:23,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:23,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:23,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:23,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 412 transitions, 5265 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:23,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:23,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:23,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:24,257 INFO L124 PetriNetUnfolderBase]: 2728/4643 cut-off events. [2024-06-27 19:33:24,257 INFO L125 PetriNetUnfolderBase]: For 414478/414478 co-relation queries the response was YES. [2024-06-27 19:33:24,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31466 conditions, 4643 events. 2728/4643 cut-off events. For 414478/414478 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 30800 event pairs, 539 based on Foata normal form. 16/4653 useless extension candidates. Maximal degree in co-relation 31313. Up to 3841 conditions per place. [2024-06-27 19:33:24,322 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 268 selfloop transitions, 163 changer transitions 0/439 dead transitions. [2024-06-27 19:33:24,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 439 transitions, 6267 flow [2024-06-27 19:33:24,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:24,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:33:24,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-27 19:33:24,323 INFO L175 Difference]: Start difference. First operand has 318 places, 412 transitions, 5265 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:33:24,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 439 transitions, 6267 flow [2024-06-27 19:33:25,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 439 transitions, 6109 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:25,896 INFO L231 Difference]: Finished difference. Result has 321 places, 414 transitions, 5511 flow [2024-06-27 19:33:25,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5107, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5511, PETRI_PLACES=321, PETRI_TRANSITIONS=414} [2024-06-27 19:33:25,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-27 19:33:25,896 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 414 transitions, 5511 flow [2024-06-27 19:33:25,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:25,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:25,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:25,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:33:25,897 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:25,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:25,898 INFO L85 PathProgramCache]: Analyzing trace with hash 199196511, now seen corresponding path program 9 times [2024-06-27 19:33:25,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:25,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347448583] [2024-06-27 19:33:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:25,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:26,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:26,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347448583] [2024-06-27 19:33:26,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347448583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:26,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:26,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:26,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83206340] [2024-06-27 19:33:26,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:26,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:26,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:26,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:26,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:26,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:26,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 414 transitions, 5511 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:26,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:26,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:26,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:26,838 INFO L124 PetriNetUnfolderBase]: 2768/4716 cut-off events. [2024-06-27 19:33:26,838 INFO L125 PetriNetUnfolderBase]: For 409309/409309 co-relation queries the response was YES. [2024-06-27 19:33:26,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32204 conditions, 4716 events. 2768/4716 cut-off events. For 409309/409309 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 31389 event pairs, 476 based on Foata normal form. 12/4722 useless extension candidates. Maximal degree in co-relation 32050. Up to 3503 conditions per place. [2024-06-27 19:33:26,901 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 259 selfloop transitions, 181 changer transitions 0/448 dead transitions. [2024-06-27 19:33:26,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 448 transitions, 6731 flow [2024-06-27 19:33:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:26,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:26,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:33:26,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:33:26,902 INFO L175 Difference]: Start difference. First operand has 321 places, 414 transitions, 5511 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:33:26,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 448 transitions, 6731 flow [2024-06-27 19:33:28,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 448 transitions, 6367 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:28,770 INFO L231 Difference]: Finished difference. Result has 323 places, 416 transitions, 5588 flow [2024-06-27 19:33:28,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5153, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5588, PETRI_PLACES=323, PETRI_TRANSITIONS=416} [2024-06-27 19:33:28,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-27 19:33:28,770 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 416 transitions, 5588 flow [2024-06-27 19:33:28,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:28,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:28,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:28,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:33:28,771 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:28,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:28,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1358434339, now seen corresponding path program 10 times [2024-06-27 19:33:28,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:28,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423641991] [2024-06-27 19:33:28,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:28,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:28,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:28,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423641991] [2024-06-27 19:33:28,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423641991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:28,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:28,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:28,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191190654] [2024-06-27 19:33:28,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:28,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:28,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:28,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:28,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:28,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:28,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 416 transitions, 5588 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:28,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:28,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:28,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:29,779 INFO L124 PetriNetUnfolderBase]: 2778/4729 cut-off events. [2024-06-27 19:33:29,779 INFO L125 PetriNetUnfolderBase]: For 396129/396129 co-relation queries the response was YES. [2024-06-27 19:33:29,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31678 conditions, 4729 events. 2778/4729 cut-off events. For 396129/396129 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31505 event pairs, 545 based on Foata normal form. 16/4739 useless extension candidates. Maximal degree in co-relation 31523. Up to 3923 conditions per place. [2024-06-27 19:33:29,843 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 270 selfloop transitions, 166 changer transitions 0/444 dead transitions. [2024-06-27 19:33:29,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 444 transitions, 6578 flow [2024-06-27 19:33:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-27 19:33:29,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-27 19:33:29,844 INFO L175 Difference]: Start difference. First operand has 323 places, 416 transitions, 5588 flow. Second operand 10 states and 238 transitions. [2024-06-27 19:33:29,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 444 transitions, 6578 flow [2024-06-27 19:33:31,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 444 transitions, 6010 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-27 19:33:31,676 INFO L231 Difference]: Finished difference. Result has 324 places, 417 transitions, 5402 flow [2024-06-27 19:33:31,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5024, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5402, PETRI_PLACES=324, PETRI_TRANSITIONS=417} [2024-06-27 19:33:31,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-27 19:33:31,677 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 417 transitions, 5402 flow [2024-06-27 19:33:31,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:31,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:31,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:31,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:33:31,678 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:31,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:31,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1358219137, now seen corresponding path program 2 times [2024-06-27 19:33:31,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:31,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424396315] [2024-06-27 19:33:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:31,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:31,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:31,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424396315] [2024-06-27 19:33:31,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424396315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:31,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:31,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:31,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536424348] [2024-06-27 19:33:31,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:31,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:31,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:31,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:31,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:31,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:31,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 417 transitions, 5402 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:31,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:31,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:31,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:32,625 INFO L124 PetriNetUnfolderBase]: 2818/4801 cut-off events. [2024-06-27 19:33:32,625 INFO L125 PetriNetUnfolderBase]: For 378071/378071 co-relation queries the response was YES. [2024-06-27 19:33:32,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31231 conditions, 4801 events. 2818/4801 cut-off events. For 378071/378071 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 32036 event pairs, 535 based on Foata normal form. 12/4807 useless extension candidates. Maximal degree in co-relation 31078. Up to 3739 conditions per place. [2024-06-27 19:33:32,688 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 261 selfloop transitions, 180 changer transitions 0/449 dead transitions. [2024-06-27 19:33:32,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 449 transitions, 6436 flow [2024-06-27 19:33:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:32,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:32,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-27 19:33:32,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:33:32,689 INFO L175 Difference]: Start difference. First operand has 324 places, 417 transitions, 5402 flow. Second operand 10 states and 240 transitions. [2024-06-27 19:33:32,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 449 transitions, 6436 flow [2024-06-27 19:33:34,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 449 transitions, 6072 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 19:33:34,519 INFO L231 Difference]: Finished difference. Result has 325 places, 419 transitions, 5468 flow [2024-06-27 19:33:34,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5038, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5468, PETRI_PLACES=325, PETRI_TRANSITIONS=419} [2024-06-27 19:33:34,519 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-27 19:33:34,519 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 419 transitions, 5468 flow [2024-06-27 19:33:34,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:34,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:34,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:34,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:33:34,520 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:34,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:34,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1411749217, now seen corresponding path program 3 times [2024-06-27 19:33:34,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:34,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572540743] [2024-06-27 19:33:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:34,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:34,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:34,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572540743] [2024-06-27 19:33:34,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572540743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:34,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:34,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:34,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774610853] [2024-06-27 19:33:34,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:34,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:34,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:34,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:34,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:34,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:34,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 419 transitions, 5468 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:34,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:34,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:34,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:35,601 INFO L124 PetriNetUnfolderBase]: 2858/4886 cut-off events. [2024-06-27 19:33:35,601 INFO L125 PetriNetUnfolderBase]: For 377186/377186 co-relation queries the response was YES. [2024-06-27 19:33:35,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31718 conditions, 4886 events. 2858/4886 cut-off events. For 377186/377186 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 32840 event pairs, 476 based on Foata normal form. 12/4896 useless extension candidates. Maximal degree in co-relation 31565. Up to 4152 conditions per place. [2024-06-27 19:33:35,667 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 69 changer transitions 0/451 dead transitions. [2024-06-27 19:33:35,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 451 transitions, 6512 flow [2024-06-27 19:33:35,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:35,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:35,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:33:35,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-27 19:33:35,668 INFO L175 Difference]: Start difference. First operand has 325 places, 419 transitions, 5468 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:33:35,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 451 transitions, 6512 flow [2024-06-27 19:33:37,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 451 transitions, 6108 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 19:33:37,514 INFO L231 Difference]: Finished difference. Result has 324 places, 421 transitions, 5273 flow [2024-06-27 19:33:37,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5068, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5273, PETRI_PLACES=324, PETRI_TRANSITIONS=421} [2024-06-27 19:33:37,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-27 19:33:37,515 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 421 transitions, 5273 flow [2024-06-27 19:33:37,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:37,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:37,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:37,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:33:37,515 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:37,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:37,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1421233641, now seen corresponding path program 4 times [2024-06-27 19:33:37,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:37,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934508034] [2024-06-27 19:33:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:37,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:37,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:37,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934508034] [2024-06-27 19:33:37,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934508034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:37,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:37,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:37,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864159976] [2024-06-27 19:33:37,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:37,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:37,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:37,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:37,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:37,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:37,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 421 transitions, 5273 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:37,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:37,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:37,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:38,468 INFO L124 PetriNetUnfolderBase]: 2924/4998 cut-off events. [2024-06-27 19:33:38,468 INFO L125 PetriNetUnfolderBase]: For 393928/393928 co-relation queries the response was YES. [2024-06-27 19:33:38,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32444 conditions, 4998 events. 2924/4998 cut-off events. For 393928/393928 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 33705 event pairs, 457 based on Foata normal form. 12/5008 useless extension candidates. Maximal degree in co-relation 32290. Up to 3972 conditions per place. [2024-06-27 19:33:38,533 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 373 selfloop transitions, 72 changer transitions 0/453 dead transitions. [2024-06-27 19:33:38,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 453 transitions, 6515 flow [2024-06-27 19:33:38,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:38,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:33:38,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-27 19:33:38,534 INFO L175 Difference]: Start difference. First operand has 324 places, 421 transitions, 5273 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:33:38,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 453 transitions, 6515 flow [2024-06-27 19:33:39,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 453 transitions, 6336 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:39,792 INFO L231 Difference]: Finished difference. Result has 327 places, 424 transitions, 5372 flow [2024-06-27 19:33:39,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5094, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5372, PETRI_PLACES=327, PETRI_TRANSITIONS=424} [2024-06-27 19:33:39,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-27 19:33:39,792 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 424 transitions, 5372 flow [2024-06-27 19:33:39,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:39,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:39,793 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] [2024-06-27 19:33:39,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:33:39,793 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:39,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:39,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1491753271, now seen corresponding path program 1 times [2024-06-27 19:33:39,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:39,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048116723] [2024-06-27 19:33:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:39,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:39,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:39,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048116723] [2024-06-27 19:33:39,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048116723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:39,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:39,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:39,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040648190] [2024-06-27 19:33:39,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:39,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:39,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:39,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:39,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:39,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:39,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 424 transitions, 5372 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:39,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:39,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:39,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:40,797 INFO L124 PetriNetUnfolderBase]: 2945/5024 cut-off events. [2024-06-27 19:33:40,797 INFO L125 PetriNetUnfolderBase]: For 369240/369246 co-relation queries the response was YES. [2024-06-27 19:33:40,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32950 conditions, 5024 events. 2945/5024 cut-off events. For 369240/369246 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 33917 event pairs, 601 based on Foata normal form. 1/5019 useless extension candidates. Maximal degree in co-relation 32794. Up to 4244 conditions per place. [2024-06-27 19:33:40,861 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 356 selfloop transitions, 105 changer transitions 0/469 dead transitions. [2024-06-27 19:33:40,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 469 transitions, 7042 flow [2024-06-27 19:33:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:40,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 19:33:40,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-27 19:33:40,862 INFO L175 Difference]: Start difference. First operand has 327 places, 424 transitions, 5372 flow. Second operand 8 states and 207 transitions. [2024-06-27 19:33:40,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 469 transitions, 7042 flow [2024-06-27 19:33:42,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 469 transitions, 6914 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:42,912 INFO L231 Difference]: Finished difference. Result has 331 places, 436 transitions, 5610 flow [2024-06-27 19:33:42,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5244, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5610, PETRI_PLACES=331, PETRI_TRANSITIONS=436} [2024-06-27 19:33:42,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-27 19:33:42,913 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 436 transitions, 5610 flow [2024-06-27 19:33:42,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:42,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:42,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:42,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:33:42,914 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:42,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:42,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1491633301, now seen corresponding path program 2 times [2024-06-27 19:33:42,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:42,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906255616] [2024-06-27 19:33:42,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:42,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:43,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:43,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906255616] [2024-06-27 19:33:43,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906255616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:43,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:43,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:43,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828557117] [2024-06-27 19:33:43,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:43,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:43,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:43,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:43,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:43,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:43,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 436 transitions, 5610 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:43,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:43,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:43,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:43,956 INFO L124 PetriNetUnfolderBase]: 2955/5042 cut-off events. [2024-06-27 19:33:43,956 INFO L125 PetriNetUnfolderBase]: For 375910/375916 co-relation queries the response was YES. [2024-06-27 19:33:44,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33497 conditions, 5042 events. 2955/5042 cut-off events. For 375910/375916 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34066 event pairs, 577 based on Foata normal form. 5/5043 useless extension candidates. Maximal degree in co-relation 33340. Up to 4442 conditions per place. [2024-06-27 19:33:44,025 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 401 selfloop transitions, 60 changer transitions 0/469 dead transitions. [2024-06-27 19:33:44,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 469 transitions, 6681 flow [2024-06-27 19:33:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:33:44,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-27 19:33:44,026 INFO L175 Difference]: Start difference. First operand has 331 places, 436 transitions, 5610 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:33:44,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 469 transitions, 6681 flow [2024-06-27 19:33:45,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 469 transitions, 6530 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-27 19:33:45,867 INFO L231 Difference]: Finished difference. Result has 337 places, 442 transitions, 5672 flow [2024-06-27 19:33:45,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5484, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5672, PETRI_PLACES=337, PETRI_TRANSITIONS=442} [2024-06-27 19:33:45,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-27 19:33:45,867 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 442 transitions, 5672 flow [2024-06-27 19:33:45,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:45,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:45,868 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] [2024-06-27 19:33:45,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:33:45,868 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:45,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:45,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1491633115, now seen corresponding path program 1 times [2024-06-27 19:33:45,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:45,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509086144] [2024-06-27 19:33:45,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:45,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:45,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:45,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509086144] [2024-06-27 19:33:45,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509086144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:45,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:45,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:45,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929640818] [2024-06-27 19:33:45,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:45,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:45,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:45,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:45,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:45,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:45,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 442 transitions, 5672 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:45,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:45,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:45,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:46,821 INFO L124 PetriNetUnfolderBase]: 2976/5075 cut-off events. [2024-06-27 19:33:46,821 INFO L125 PetriNetUnfolderBase]: For 384326/384332 co-relation queries the response was YES. [2024-06-27 19:33:46,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33948 conditions, 5075 events. 2976/5075 cut-off events. For 384326/384332 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34300 event pairs, 587 based on Foata normal form. 5/5076 useless extension candidates. Maximal degree in co-relation 33788. Up to 4340 conditions per place. [2024-06-27 19:33:47,034 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 353 selfloop transitions, 120 changer transitions 0/481 dead transitions. [2024-06-27 19:33:47,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 481 transitions, 7340 flow [2024-06-27 19:33:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:33:47,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:33:47,035 INFO L175 Difference]: Start difference. First operand has 337 places, 442 transitions, 5672 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:33:47,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 481 transitions, 7340 flow [2024-06-27 19:33:48,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 481 transitions, 7231 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:48,927 INFO L231 Difference]: Finished difference. Result has 341 places, 451 transitions, 5929 flow [2024-06-27 19:33:48,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5563, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5929, PETRI_PLACES=341, PETRI_TRANSITIONS=451} [2024-06-27 19:33:48,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-27 19:33:48,928 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 451 transitions, 5929 flow [2024-06-27 19:33:48,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:48,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:48,928 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] [2024-06-27 19:33:48,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:33:48,928 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:48,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:48,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1405115685, now seen corresponding path program 3 times [2024-06-27 19:33:48,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:48,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962994591] [2024-06-27 19:33:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:48,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:49,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:49,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962994591] [2024-06-27 19:33:49,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962994591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:49,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:49,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:49,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556591965] [2024-06-27 19:33:49,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:49,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:49,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:49,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:49,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:49,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:49,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 451 transitions, 5929 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:49,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:49,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:49,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:49,995 INFO L124 PetriNetUnfolderBase]: 2994/5102 cut-off events. [2024-06-27 19:33:49,995 INFO L125 PetriNetUnfolderBase]: For 396971/396977 co-relation queries the response was YES. [2024-06-27 19:33:50,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34462 conditions, 5102 events. 2994/5102 cut-off events. For 396971/396977 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34466 event pairs, 576 based on Foata normal form. 5/5103 useless extension candidates. Maximal degree in co-relation 34301. Up to 4488 conditions per place. [2024-06-27 19:33:50,071 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 413 selfloop transitions, 70 changer transitions 0/491 dead transitions. [2024-06-27 19:33:50,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 491 transitions, 7243 flow [2024-06-27 19:33:50,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:33:50,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:33:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-27 19:33:50,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5676274944567627 [2024-06-27 19:33:50,072 INFO L175 Difference]: Start difference. First operand has 341 places, 451 transitions, 5929 flow. Second operand 11 states and 256 transitions. [2024-06-27 19:33:50,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 491 transitions, 7243 flow [2024-06-27 19:33:52,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 491 transitions, 6955 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:52,023 INFO L231 Difference]: Finished difference. Result has 348 places, 460 transitions, 5901 flow [2024-06-27 19:33:52,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5645, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5901, PETRI_PLACES=348, PETRI_TRANSITIONS=460} [2024-06-27 19:33:52,024 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-27 19:33:52,024 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 460 transitions, 5901 flow [2024-06-27 19:33:52,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:52,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:52,025 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] [2024-06-27 19:33:52,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:33:52,025 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:52,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:52,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1232388459, now seen corresponding path program 2 times [2024-06-27 19:33:52,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:52,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936061231] [2024-06-27 19:33:52,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:52,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:52,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:52,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936061231] [2024-06-27 19:33:52,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936061231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:52,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:52,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:52,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603955270] [2024-06-27 19:33:52,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:52,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:52,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:52,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:52,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:52,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:52,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 460 transitions, 5901 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:52,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:52,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:52,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:53,001 INFO L124 PetriNetUnfolderBase]: 2999/5112 cut-off events. [2024-06-27 19:33:53,001 INFO L125 PetriNetUnfolderBase]: For 404978/404984 co-relation queries the response was YES. [2024-06-27 19:33:53,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34438 conditions, 5112 events. 2999/5112 cut-off events. For 404978/404984 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34617 event pairs, 597 based on Foata normal form. 5/5112 useless extension candidates. Maximal degree in co-relation 34275. Up to 4368 conditions per place. [2024-06-27 19:33:53,069 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 356 selfloop transitions, 125 changer transitions 0/489 dead transitions. [2024-06-27 19:33:53,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 489 transitions, 7319 flow [2024-06-27 19:33:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:53,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:53,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:33:53,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:33:53,070 INFO L175 Difference]: Start difference. First operand has 348 places, 460 transitions, 5901 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:33:53,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 489 transitions, 7319 flow [2024-06-27 19:33:55,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 489 transitions, 7132 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 19:33:55,041 INFO L231 Difference]: Finished difference. Result has 347 places, 463 transitions, 6002 flow [2024-06-27 19:33:55,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5714, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6002, PETRI_PLACES=347, PETRI_TRANSITIONS=463} [2024-06-27 19:33:55,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-27 19:33:55,042 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 463 transitions, 6002 flow [2024-06-27 19:33:55,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:55,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:55,043 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] [2024-06-27 19:33:55,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 19:33:55,043 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:55,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:55,043 INFO L85 PathProgramCache]: Analyzing trace with hash -526785429, now seen corresponding path program 3 times [2024-06-27 19:33:55,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:55,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070016116] [2024-06-27 19:33:55,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:55,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:55,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:55,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070016116] [2024-06-27 19:33:55,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070016116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:55,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:55,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:55,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96813468] [2024-06-27 19:33:55,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:55,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:55,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:55,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:55,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:55,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:55,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 463 transitions, 6002 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:55,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:55,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:55,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:56,013 INFO L124 PetriNetUnfolderBase]: 3004/5118 cut-off events. [2024-06-27 19:33:56,013 INFO L125 PetriNetUnfolderBase]: For 412861/412867 co-relation queries the response was YES. [2024-06-27 19:33:56,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34668 conditions, 5118 events. 3004/5118 cut-off events. For 412861/412867 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 34608 event pairs, 587 based on Foata normal form. 5/5119 useless extension candidates. Maximal degree in co-relation 34505. Up to 4374 conditions per place. [2024-06-27 19:33:56,087 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 361 selfloop transitions, 129 changer transitions 0/498 dead transitions. [2024-06-27 19:33:56,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 498 transitions, 7644 flow [2024-06-27 19:33:56,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:56,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:56,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-27 19:33:56,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:33:56,088 INFO L175 Difference]: Start difference. First operand has 347 places, 463 transitions, 6002 flow. Second operand 10 states and 246 transitions. [2024-06-27 19:33:56,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 498 transitions, 7644 flow [2024-06-27 19:33:57,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 498 transitions, 7442 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:57,970 INFO L231 Difference]: Finished difference. Result has 352 places, 466 transitions, 6102 flow [2024-06-27 19:33:57,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5803, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6102, PETRI_PLACES=352, PETRI_TRANSITIONS=466} [2024-06-27 19:33:57,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-27 19:33:57,970 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 466 transitions, 6102 flow [2024-06-27 19:33:57,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:57,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:57,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:57,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 19:33:57,971 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:57,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:57,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1498415145, now seen corresponding path program 1 times [2024-06-27 19:33:57,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:57,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824426511] [2024-06-27 19:33:57,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:57,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:58,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:58,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824426511] [2024-06-27 19:33:58,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824426511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:58,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:58,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:58,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446497965] [2024-06-27 19:33:58,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:58,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:58,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:58,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:58,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:58,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:58,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 466 transitions, 6102 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:58,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:58,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:58,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:59,025 INFO L124 PetriNetUnfolderBase]: 3139/5338 cut-off events. [2024-06-27 19:33:59,025 INFO L125 PetriNetUnfolderBase]: For 531659/531665 co-relation queries the response was YES. [2024-06-27 19:33:59,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37341 conditions, 5338 events. 3139/5338 cut-off events. For 531659/531665 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 36153 event pairs, 536 based on Foata normal form. 16/5349 useless extension candidates. Maximal degree in co-relation 37176. Up to 4297 conditions per place. [2024-06-27 19:33:59,097 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 365 selfloop transitions, 138 changer transitions 0/511 dead transitions. [2024-06-27 19:33:59,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 511 transitions, 7886 flow [2024-06-27 19:33:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:59,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:59,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 19:33:59,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-27 19:33:59,098 INFO L175 Difference]: Start difference. First operand has 352 places, 466 transitions, 6102 flow. Second operand 8 states and 210 transitions. [2024-06-27 19:33:59,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 511 transitions, 7886 flow [2024-06-27 19:34:01,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 511 transitions, 7532 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 19:34:01,490 INFO L231 Difference]: Finished difference. Result has 352 places, 473 transitions, 6151 flow [2024-06-27 19:34:01,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6151, PETRI_PLACES=352, PETRI_TRANSITIONS=473} [2024-06-27 19:34:01,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-27 19:34:01,491 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 473 transitions, 6151 flow [2024-06-27 19:34:01,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:01,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:01,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:01,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 19:34:01,491 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:01,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:01,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1232391435, now seen corresponding path program 2 times [2024-06-27 19:34:01,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:01,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651089418] [2024-06-27 19:34:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:01,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:01,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:01,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651089418] [2024-06-27 19:34:01,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651089418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:01,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:01,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:01,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244419350] [2024-06-27 19:34:01,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:01,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:01,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:01,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:01,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:01,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:01,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 473 transitions, 6151 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:01,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:01,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:01,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:02,582 INFO L124 PetriNetUnfolderBase]: 3195/5434 cut-off events. [2024-06-27 19:34:02,582 INFO L125 PetriNetUnfolderBase]: For 561589/561595 co-relation queries the response was YES. [2024-06-27 19:34:02,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38216 conditions, 5434 events. 3195/5434 cut-off events. For 561589/561595 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 37023 event pairs, 646 based on Foata normal form. 20/5449 useless extension candidates. Maximal degree in co-relation 38050. Up to 4607 conditions per place. [2024-06-27 19:34:02,657 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 367 selfloop transitions, 130 changer transitions 0/505 dead transitions. [2024-06-27 19:34:02,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 505 transitions, 7655 flow [2024-06-27 19:34:02,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:34:02,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-27 19:34:02,658 INFO L175 Difference]: Start difference. First operand has 352 places, 473 transitions, 6151 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:34:02,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 505 transitions, 7655 flow [2024-06-27 19:34:05,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 505 transitions, 7449 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 19:34:05,206 INFO L231 Difference]: Finished difference. Result has 357 places, 475 transitions, 6265 flow [2024-06-27 19:34:05,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5949, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6265, PETRI_PLACES=357, PETRI_TRANSITIONS=475} [2024-06-27 19:34:05,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-27 19:34:05,207 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 475 transitions, 6265 flow [2024-06-27 19:34:05,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:05,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:05,207 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] [2024-06-27 19:34:05,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 19:34:05,207 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:05,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:05,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1232717865, now seen corresponding path program 3 times [2024-06-27 19:34:05,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:05,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814157596] [2024-06-27 19:34:05,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:05,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:05,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:05,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814157596] [2024-06-27 19:34:05,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814157596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:05,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:05,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:05,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945773466] [2024-06-27 19:34:05,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:05,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:05,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:05,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:05,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:05,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:05,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 475 transitions, 6265 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:05,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:05,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:05,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:06,302 INFO L124 PetriNetUnfolderBase]: 3251/5522 cut-off events. [2024-06-27 19:34:06,302 INFO L125 PetriNetUnfolderBase]: For 555641/555647 co-relation queries the response was YES. [2024-06-27 19:34:06,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38980 conditions, 5522 events. 3251/5522 cut-off events. For 555641/555647 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 37639 event pairs, 642 based on Foata normal form. 16/5533 useless extension candidates. Maximal degree in co-relation 38812. Up to 4635 conditions per place. [2024-06-27 19:34:06,379 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 371 selfloop transitions, 134 changer transitions 0/513 dead transitions. [2024-06-27 19:34:06,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 513 transitions, 7829 flow [2024-06-27 19:34:06,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:06,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:06,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:34:06,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-27 19:34:06,380 INFO L175 Difference]: Start difference. First operand has 357 places, 475 transitions, 6265 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:34:06,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 513 transitions, 7829 flow [2024-06-27 19:34:08,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 513 transitions, 7547 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:08,776 INFO L231 Difference]: Finished difference. Result has 360 places, 480 transitions, 6350 flow [2024-06-27 19:34:08,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5983, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6350, PETRI_PLACES=360, PETRI_TRANSITIONS=480} [2024-06-27 19:34:08,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-27 19:34:08,777 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 480 transitions, 6350 flow [2024-06-27 19:34:08,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:08,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:08,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:08,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 19:34:08,778 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:08,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:08,778 INFO L85 PathProgramCache]: Analyzing trace with hash 805330791, now seen corresponding path program 4 times [2024-06-27 19:34:08,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:08,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889594688] [2024-06-27 19:34:08,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:08,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:08,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:08,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889594688] [2024-06-27 19:34:08,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889594688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:08,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:08,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:08,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682497410] [2024-06-27 19:34:08,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:08,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:08,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:08,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:08,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:08,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:08,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 480 transitions, 6350 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:08,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:08,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:08,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:09,830 INFO L124 PetriNetUnfolderBase]: 3264/5513 cut-off events. [2024-06-27 19:34:09,830 INFO L125 PetriNetUnfolderBase]: For 521872/521872 co-relation queries the response was YES. [2024-06-27 19:34:09,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39247 conditions, 5513 events. 3264/5513 cut-off events. For 521872/521872 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 37480 event pairs, 676 based on Foata normal form. 1/5500 useless extension candidates. Maximal degree in co-relation 39077. Up to 4716 conditions per place. [2024-06-27 19:34:09,905 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 378 selfloop transitions, 123 changer transitions 0/509 dead transitions. [2024-06-27 19:34:09,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 509 transitions, 8058 flow [2024-06-27 19:34:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:09,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:09,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:34:09,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:34:09,906 INFO L175 Difference]: Start difference. First operand has 360 places, 480 transitions, 6350 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:34:09,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 509 transitions, 8058 flow [2024-06-27 19:34:12,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 509 transitions, 7763 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:12,433 INFO L231 Difference]: Finished difference. Result has 362 places, 486 transitions, 6387 flow [2024-06-27 19:34:12,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6055, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6387, PETRI_PLACES=362, PETRI_TRANSITIONS=486} [2024-06-27 19:34:12,434 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-27 19:34:12,434 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 486 transitions, 6387 flow [2024-06-27 19:34:12,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:12,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:12,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:12,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 19:34:12,434 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:12,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:12,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1576114813, now seen corresponding path program 5 times [2024-06-27 19:34:12,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:12,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411658170] [2024-06-27 19:34:12,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:12,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:12,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:12,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411658170] [2024-06-27 19:34:12,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411658170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:12,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:12,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:12,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331389] [2024-06-27 19:34:12,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:12,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:12,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:12,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:12,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:12,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 486 transitions, 6387 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:12,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:12,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:12,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:13,463 INFO L124 PetriNetUnfolderBase]: 3277/5533 cut-off events. [2024-06-27 19:34:13,463 INFO L125 PetriNetUnfolderBase]: For 534975/534975 co-relation queries the response was YES. [2024-06-27 19:34:13,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39333 conditions, 5533 events. 3277/5533 cut-off events. For 534975/534975 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 37614 event pairs, 676 based on Foata normal form. 1/5520 useless extension candidates. Maximal degree in co-relation 39162. Up to 4731 conditions per place. [2024-06-27 19:34:13,542 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 376 selfloop transitions, 128 changer transitions 0/512 dead transitions. [2024-06-27 19:34:13,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 512 transitions, 8111 flow [2024-06-27 19:34:13,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:13,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:13,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:34:13,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-27 19:34:13,543 INFO L175 Difference]: Start difference. First operand has 362 places, 486 transitions, 6387 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:34:13,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 512 transitions, 8111 flow [2024-06-27 19:34:15,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 512 transitions, 7833 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-27 19:34:15,868 INFO L231 Difference]: Finished difference. Result has 366 places, 492 transitions, 6463 flow [2024-06-27 19:34:15,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6145, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6463, PETRI_PLACES=366, PETRI_TRANSITIONS=492} [2024-06-27 19:34:15,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-27 19:34:15,869 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 492 transitions, 6463 flow [2024-06-27 19:34:15,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:15,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:15,869 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] [2024-06-27 19:34:15,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 19:34:15,869 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:15,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:15,870 INFO L85 PathProgramCache]: Analyzing trace with hash -503378245, now seen corresponding path program 6 times [2024-06-27 19:34:15,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:15,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965683669] [2024-06-27 19:34:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:15,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:15,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:15,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965683669] [2024-06-27 19:34:15,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965683669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:15,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:15,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:15,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941988959] [2024-06-27 19:34:15,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:15,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:15,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:15,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:15,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:15,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:15,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 492 transitions, 6463 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:15,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:15,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:15,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:16,932 INFO L124 PetriNetUnfolderBase]: 3274/5529 cut-off events. [2024-06-27 19:34:16,932 INFO L125 PetriNetUnfolderBase]: For 540651/540651 co-relation queries the response was YES. [2024-06-27 19:34:16,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39268 conditions, 5529 events. 3274/5529 cut-off events. For 540651/540651 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 37616 event pairs, 676 based on Foata normal form. 1/5516 useless extension candidates. Maximal degree in co-relation 39096. Up to 4728 conditions per place. [2024-06-27 19:34:17,006 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 383 selfloop transitions, 125 changer transitions 0/516 dead transitions. [2024-06-27 19:34:17,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 516 transitions, 8313 flow [2024-06-27 19:34:17,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:17,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:34:17,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-27 19:34:17,007 INFO L175 Difference]: Start difference. First operand has 366 places, 492 transitions, 6463 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:34:17,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 516 transitions, 8313 flow [2024-06-27 19:34:19,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 516 transitions, 8105 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 19:34:19,367 INFO L231 Difference]: Finished difference. Result has 370 places, 492 transitions, 6511 flow [2024-06-27 19:34:19,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6255, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6511, PETRI_PLACES=370, PETRI_TRANSITIONS=492} [2024-06-27 19:34:19,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-27 19:34:19,368 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 492 transitions, 6511 flow [2024-06-27 19:34:19,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:19,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:19,369 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] [2024-06-27 19:34:19,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 19:34:19,369 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:19,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:19,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1569334183, now seen corresponding path program 7 times [2024-06-27 19:34:19,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:19,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312395991] [2024-06-27 19:34:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:19,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:19,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:19,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312395991] [2024-06-27 19:34:19,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312395991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:19,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:19,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:19,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609084321] [2024-06-27 19:34:19,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:19,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:19,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:19,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:19,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:19,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:19,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 492 transitions, 6511 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:19,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:19,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:19,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:20,459 INFO L124 PetriNetUnfolderBase]: 3284/5555 cut-off events. [2024-06-27 19:34:20,459 INFO L125 PetriNetUnfolderBase]: For 551306/551306 co-relation queries the response was YES. [2024-06-27 19:34:20,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39517 conditions, 5555 events. 3284/5555 cut-off events. For 551306/551306 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37889 event pairs, 646 based on Foata normal form. 1/5545 useless extension candidates. Maximal degree in co-relation 39344. Up to 4939 conditions per place. [2024-06-27 19:34:20,541 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 441 selfloop transitions, 66 changer transitions 0/515 dead transitions. [2024-06-27 19:34:20,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 515 transitions, 7657 flow [2024-06-27 19:34:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:20,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:34:20,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:34:20,541 INFO L175 Difference]: Start difference. First operand has 370 places, 492 transitions, 6511 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:34:20,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 515 transitions, 7657 flow [2024-06-27 19:34:23,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 515 transitions, 7259 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 19:34:23,070 INFO L231 Difference]: Finished difference. Result has 370 places, 498 transitions, 6347 flow [2024-06-27 19:34:23,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6140, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6347, PETRI_PLACES=370, PETRI_TRANSITIONS=498} [2024-06-27 19:34:23,070 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-27 19:34:23,070 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 498 transitions, 6347 flow [2024-06-27 19:34:23,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:23,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:23,071 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] [2024-06-27 19:34:23,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 19:34:23,071 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:23,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:23,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1569334369, now seen corresponding path program 4 times [2024-06-27 19:34:23,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:23,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660340080] [2024-06-27 19:34:23,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:23,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:23,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:23,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660340080] [2024-06-27 19:34:23,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660340080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:23,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:23,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:23,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499182014] [2024-06-27 19:34:23,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:23,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:23,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:23,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:23,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:23,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:23,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 498 transitions, 6347 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:23,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:23,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:23,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:24,166 INFO L124 PetriNetUnfolderBase]: 3289/5562 cut-off events. [2024-06-27 19:34:24,167 INFO L125 PetriNetUnfolderBase]: For 559832/559832 co-relation queries the response was YES. [2024-06-27 19:34:24,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39418 conditions, 5562 events. 3289/5562 cut-off events. For 559832/559832 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 37915 event pairs, 668 based on Foata normal form. 1/5552 useless extension candidates. Maximal degree in co-relation 39245. Up to 4808 conditions per place. [2024-06-27 19:34:24,244 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 380 selfloop transitions, 133 changer transitions 0/521 dead transitions. [2024-06-27 19:34:24,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 521 transitions, 8058 flow [2024-06-27 19:34:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:34:24,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-27 19:34:24,245 INFO L175 Difference]: Start difference. First operand has 370 places, 498 transitions, 6347 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:34:24,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 521 transitions, 8058 flow [2024-06-27 19:34:27,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 521 transitions, 7920 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:27,356 INFO L231 Difference]: Finished difference. Result has 373 places, 501 transitions, 6524 flow [2024-06-27 19:34:27,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6209, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6524, PETRI_PLACES=373, PETRI_TRANSITIONS=501} [2024-06-27 19:34:27,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-27 19:34:27,357 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 501 transitions, 6524 flow [2024-06-27 19:34:27,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:27,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:27,357 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] [2024-06-27 19:34:27,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 19:34:27,358 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:27,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:27,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1920538379, now seen corresponding path program 8 times [2024-06-27 19:34:27,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:27,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393227127] [2024-06-27 19:34:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:27,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:27,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:27,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393227127] [2024-06-27 19:34:27,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393227127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:27,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:27,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:27,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066160086] [2024-06-27 19:34:27,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:27,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:27,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:27,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:27,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:27,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:27,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 501 transitions, 6524 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:27,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:27,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:27,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:28,463 INFO L124 PetriNetUnfolderBase]: 3307/5595 cut-off events. [2024-06-27 19:34:28,464 INFO L125 PetriNetUnfolderBase]: For 575774/575774 co-relation queries the response was YES. [2024-06-27 19:34:28,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39951 conditions, 5595 events. 3307/5595 cut-off events. For 575774/575774 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 38213 event pairs, 646 based on Foata normal form. 1/5585 useless extension candidates. Maximal degree in co-relation 39777. Up to 4954 conditions per place. [2024-06-27 19:34:28,550 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 437 selfloop transitions, 80 changer transitions 0/525 dead transitions. [2024-06-27 19:34:28,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 525 transitions, 7890 flow [2024-06-27 19:34:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:28,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:34:28,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-27 19:34:28,552 INFO L175 Difference]: Start difference. First operand has 373 places, 501 transitions, 6524 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:34:28,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 525 transitions, 7890 flow [2024-06-27 19:34:31,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 525 transitions, 7554 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:31,199 INFO L231 Difference]: Finished difference. Result has 376 places, 510 transitions, 6479 flow [2024-06-27 19:34:31,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6192, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6479, PETRI_PLACES=376, PETRI_TRANSITIONS=510} [2024-06-27 19:34:31,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-27 19:34:31,200 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 510 transitions, 6479 flow [2024-06-27 19:34:31,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:31,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:31,200 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] [2024-06-27 19:34:31,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 19:34:31,201 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:31,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:31,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1920717125, now seen corresponding path program 5 times [2024-06-27 19:34:31,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:31,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770886342] [2024-06-27 19:34:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:31,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:31,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:31,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770886342] [2024-06-27 19:34:31,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770886342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:31,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:31,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:31,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775144005] [2024-06-27 19:34:31,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:31,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:31,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:31,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:31,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:31,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:31,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 510 transitions, 6479 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:31,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:31,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:31,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:32,313 INFO L124 PetriNetUnfolderBase]: 3320/5615 cut-off events. [2024-06-27 19:34:32,313 INFO L125 PetriNetUnfolderBase]: For 590738/590738 co-relation queries the response was YES. [2024-06-27 19:34:32,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40143 conditions, 5615 events. 3320/5615 cut-off events. For 590738/590738 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 38365 event pairs, 668 based on Foata normal form. 1/5605 useless extension candidates. Maximal degree in co-relation 39968. Up to 4845 conditions per place. [2024-06-27 19:34:32,390 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 387 selfloop transitions, 138 changer transitions 0/533 dead transitions. [2024-06-27 19:34:32,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 533 transitions, 8245 flow [2024-06-27 19:34:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:32,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:34:32,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-27 19:34:32,391 INFO L175 Difference]: Start difference. First operand has 376 places, 510 transitions, 6479 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:34:32,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 533 transitions, 8245 flow [2024-06-27 19:34:35,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 533 transitions, 8137 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 19:34:35,284 INFO L231 Difference]: Finished difference. Result has 381 places, 516 transitions, 6723 flow [2024-06-27 19:34:35,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6723, PETRI_PLACES=381, PETRI_TRANSITIONS=516} [2024-06-27 19:34:35,284 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-27 19:34:35,284 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 516 transitions, 6723 flow [2024-06-27 19:34:35,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:35,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:35,284 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] [2024-06-27 19:34:35,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 19:34:35,285 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:35,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:35,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1580376259, now seen corresponding path program 6 times [2024-06-27 19:34:35,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:35,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113201576] [2024-06-27 19:34:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:35,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:35,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:35,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113201576] [2024-06-27 19:34:35,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113201576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:35,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:35,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:35,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138090116] [2024-06-27 19:34:35,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:35,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:35,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:35,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:35,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:35,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:35,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 516 transitions, 6723 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:35,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:35,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:35,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:36,336 INFO L124 PetriNetUnfolderBase]: 3317/5611 cut-off events. [2024-06-27 19:34:36,337 INFO L125 PetriNetUnfolderBase]: For 597149/597149 co-relation queries the response was YES. [2024-06-27 19:34:36,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40314 conditions, 5611 events. 3317/5611 cut-off events. For 597149/597149 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 38311 event pairs, 668 based on Foata normal form. 1/5601 useless extension candidates. Maximal degree in co-relation 40138. Up to 4842 conditions per place. [2024-06-27 19:34:36,417 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 388 selfloop transitions, 136 changer transitions 0/532 dead transitions. [2024-06-27 19:34:36,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 532 transitions, 8217 flow [2024-06-27 19:34:36,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:34:36,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-27 19:34:36,417 INFO L175 Difference]: Start difference. First operand has 381 places, 516 transitions, 6723 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:34:36,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 532 transitions, 8217 flow [2024-06-27 19:34:39,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 532 transitions, 7987 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 19:34:39,069 INFO L231 Difference]: Finished difference. Result has 385 places, 516 transitions, 6771 flow [2024-06-27 19:34:39,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6493, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6771, PETRI_PLACES=385, PETRI_TRANSITIONS=516} [2024-06-27 19:34:39,070 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-27 19:34:39,070 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 516 transitions, 6771 flow [2024-06-27 19:34:39,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:39,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:39,070 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] [2024-06-27 19:34:39,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 19:34:39,070 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:39,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:39,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1920330989, now seen corresponding path program 9 times [2024-06-27 19:34:39,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:39,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703978548] [2024-06-27 19:34:39,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:39,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:39,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:39,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703978548] [2024-06-27 19:34:39,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703978548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:39,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:39,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:39,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563563220] [2024-06-27 19:34:39,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:39,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:39,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:39,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:39,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:39,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:39,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 516 transitions, 6771 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:39,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:39,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:39,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:40,182 INFO L124 PetriNetUnfolderBase]: 3314/5609 cut-off events. [2024-06-27 19:34:40,182 INFO L125 PetriNetUnfolderBase]: For 603005/603005 co-relation queries the response was YES. [2024-06-27 19:34:40,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40320 conditions, 5609 events. 3314/5609 cut-off events. For 603005/603005 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 38335 event pairs, 646 based on Foata normal form. 1/5599 useless extension candidates. Maximal degree in co-relation 40143. Up to 4965 conditions per place. [2024-06-27 19:34:40,263 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 443 selfloop transitions, 81 changer transitions 0/532 dead transitions. [2024-06-27 19:34:40,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 532 transitions, 7857 flow [2024-06-27 19:34:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:34:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:34:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-27 19:34:40,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-27 19:34:40,264 INFO L175 Difference]: Start difference. First operand has 385 places, 516 transitions, 6771 flow. Second operand 9 states and 206 transitions. [2024-06-27 19:34:40,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 532 transitions, 7857 flow [2024-06-27 19:34:42,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 532 transitions, 7576 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:43,002 INFO L231 Difference]: Finished difference. Result has 389 places, 516 transitions, 6658 flow [2024-06-27 19:34:43,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6490, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6658, PETRI_PLACES=389, PETRI_TRANSITIONS=516} [2024-06-27 19:34:43,002 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-27 19:34:43,002 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 516 transitions, 6658 flow [2024-06-27 19:34:43,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:43,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:43,003 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] [2024-06-27 19:34:43,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 19:34:43,003 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:43,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:43,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2064401467, now seen corresponding path program 10 times [2024-06-27 19:34:43,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:43,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527088682] [2024-06-27 19:34:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:43,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:43,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:43,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527088682] [2024-06-27 19:34:43,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527088682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:43,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:43,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:43,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521376750] [2024-06-27 19:34:43,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:43,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:43,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:43,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:43,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:43,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:43,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 516 transitions, 6658 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:43,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:43,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:43,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:44,139 INFO L124 PetriNetUnfolderBase]: 3319/5620 cut-off events. [2024-06-27 19:34:44,139 INFO L125 PetriNetUnfolderBase]: For 613396/613396 co-relation queries the response was YES. [2024-06-27 19:34:44,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40322 conditions, 5620 events. 3319/5620 cut-off events. For 613396/613396 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 38467 event pairs, 646 based on Foata normal form. 1/5610 useless extension candidates. Maximal degree in co-relation 40144. Up to 4822 conditions per place. [2024-06-27 19:34:44,220 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 403 selfloop transitions, 142 changer transitions 0/553 dead transitions. [2024-06-27 19:34:44,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 553 transitions, 8490 flow [2024-06-27 19:34:44,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:34:44,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:34:44,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-27 19:34:44,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-27 19:34:44,221 INFO L175 Difference]: Start difference. First operand has 389 places, 516 transitions, 6658 flow. Second operand 9 states and 228 transitions. [2024-06-27 19:34:44,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 553 transitions, 8490 flow [2024-06-27 19:34:47,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 553 transitions, 8286 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 19:34:47,124 INFO L231 Difference]: Finished difference. Result has 390 places, 519 transitions, 6836 flow [2024-06-27 19:34:47,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6454, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6836, PETRI_PLACES=390, PETRI_TRANSITIONS=519} [2024-06-27 19:34:47,125 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-27 19:34:47,125 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 519 transitions, 6836 flow [2024-06-27 19:34:47,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:47,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:47,125 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] [2024-06-27 19:34:47,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 19:34:47,125 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:47,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:47,125 INFO L85 PathProgramCache]: Analyzing trace with hash 351795711, now seen corresponding path program 7 times [2024-06-27 19:34:47,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:47,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437957660] [2024-06-27 19:34:47,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:47,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:47,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:47,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437957660] [2024-06-27 19:34:47,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437957660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:47,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:47,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:47,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244816736] [2024-06-27 19:34:47,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:47,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:47,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:47,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:47,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:47,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:47,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 519 transitions, 6836 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:47,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:47,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:47,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:48,218 INFO L124 PetriNetUnfolderBase]: 3340/5651 cut-off events. [2024-06-27 19:34:48,219 INFO L125 PetriNetUnfolderBase]: For 636521/636521 co-relation queries the response was YES. [2024-06-27 19:34:48,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41123 conditions, 5651 events. 3340/5651 cut-off events. For 636521/636521 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 38694 event pairs, 668 based on Foata normal form. 1/5641 useless extension candidates. Maximal degree in co-relation 40943. Up to 4869 conditions per place. [2024-06-27 19:34:48,301 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 386 selfloop transitions, 150 changer transitions 0/544 dead transitions. [2024-06-27 19:34:48,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 544 transitions, 8690 flow [2024-06-27 19:34:48,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:34:48,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:34:48,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:34:48,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-27 19:34:48,301 INFO L175 Difference]: Start difference. First operand has 390 places, 519 transitions, 6836 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:34:48,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 544 transitions, 8690 flow [2024-06-27 19:34:51,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 544 transitions, 8346 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 19:34:51,420 INFO L231 Difference]: Finished difference. Result has 386 places, 528 transitions, 6934 flow [2024-06-27 19:34:51,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6510, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6934, PETRI_PLACES=386, PETRI_TRANSITIONS=528} [2024-06-27 19:34:51,420 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-27 19:34:51,420 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 528 transitions, 6934 flow [2024-06-27 19:34:51,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:51,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:51,421 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] [2024-06-27 19:34:51,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 19:34:51,421 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:51,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:51,421 INFO L85 PathProgramCache]: Analyzing trace with hash -673804249, now seen corresponding path program 8 times [2024-06-27 19:34:51,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:51,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200292780] [2024-06-27 19:34:51,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:51,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:51,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:51,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200292780] [2024-06-27 19:34:51,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200292780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:51,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:51,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:51,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508688356] [2024-06-27 19:34:51,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:51,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:51,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:51,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:51,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:51,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:51,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 528 transitions, 6934 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:51,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:51,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:51,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:52,505 INFO L124 PetriNetUnfolderBase]: 3337/5647 cut-off events. [2024-06-27 19:34:52,505 INFO L125 PetriNetUnfolderBase]: For 608704/608704 co-relation queries the response was YES. [2024-06-27 19:34:52,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40735 conditions, 5647 events. 3337/5647 cut-off events. For 608704/608704 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 38649 event pairs, 668 based on Foata normal form. 1/5637 useless extension candidates. Maximal degree in co-relation 40556. Up to 4866 conditions per place. [2024-06-27 19:34:52,585 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 388 selfloop transitions, 151 changer transitions 0/547 dead transitions. [2024-06-27 19:34:52,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 547 transitions, 8676 flow [2024-06-27 19:34:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:34:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:34:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 19:34:52,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-27 19:34:52,586 INFO L175 Difference]: Start difference. First operand has 386 places, 528 transitions, 6934 flow. Second operand 6 states and 155 transitions. [2024-06-27 19:34:52,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 547 transitions, 8676 flow [2024-06-27 19:34:55,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 547 transitions, 8422 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:55,627 INFO L231 Difference]: Finished difference. Result has 388 places, 528 transitions, 7002 flow [2024-06-27 19:34:55,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6686, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7002, PETRI_PLACES=388, PETRI_TRANSITIONS=528} [2024-06-27 19:34:55,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-27 19:34:55,627 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 528 transitions, 7002 flow [2024-06-27 19:34:55,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:55,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:55,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:55,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 19:34:55,627 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:55,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:55,628 INFO L85 PathProgramCache]: Analyzing trace with hash 574935261, now seen corresponding path program 9 times [2024-06-27 19:34:55,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:55,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900647922] [2024-06-27 19:34:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:55,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:55,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:55,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900647922] [2024-06-27 19:34:55,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900647922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:55,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:55,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:55,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589244864] [2024-06-27 19:34:55,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:55,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:55,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:55,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:55,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:55,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:55,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 528 transitions, 7002 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:55,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:55,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:55,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:56,812 INFO L124 PetriNetUnfolderBase]: 3342/5677 cut-off events. [2024-06-27 19:34:56,813 INFO L125 PetriNetUnfolderBase]: For 609859/609865 co-relation queries the response was YES. [2024-06-27 19:34:56,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40828 conditions, 5677 events. 3342/5677 cut-off events. For 609859/609865 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 38973 event pairs, 662 based on Foata normal form. 5/5677 useless extension candidates. Maximal degree in co-relation 40650. Up to 4872 conditions per place. [2024-06-27 19:34:56,894 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 395 selfloop transitions, 148 changer transitions 0/551 dead transitions. [2024-06-27 19:34:56,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 551 transitions, 8595 flow [2024-06-27 19:34:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:56,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:34:56,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-27 19:34:56,895 INFO L175 Difference]: Start difference. First operand has 388 places, 528 transitions, 7002 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:34:56,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 551 transitions, 8595 flow [2024-06-27 19:35:00,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 551 transitions, 8305 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:00,054 INFO L231 Difference]: Finished difference. Result has 391 places, 531 transitions, 7069 flow [2024-06-27 19:35:00,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6726, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7069, PETRI_PLACES=391, PETRI_TRANSITIONS=531} [2024-06-27 19:35:00,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-27 19:35:00,054 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 531 transitions, 7069 flow [2024-06-27 19:35:00,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:00,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:00,055 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] [2024-06-27 19:35:00,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 19:35:00,055 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:00,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:00,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1388629455, now seen corresponding path program 10 times [2024-06-27 19:35:00,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:00,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378245460] [2024-06-27 19:35:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:00,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:00,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:00,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378245460] [2024-06-27 19:35:00,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378245460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:00,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:00,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:00,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755993556] [2024-06-27 19:35:00,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:00,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:00,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:00,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:00,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:00,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:00,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 531 transitions, 7069 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:00,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:00,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:00,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:01,204 INFO L124 PetriNetUnfolderBase]: 3355/5697 cut-off events. [2024-06-27 19:35:01,205 INFO L125 PetriNetUnfolderBase]: For 604370/604376 co-relation queries the response was YES. [2024-06-27 19:35:01,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40971 conditions, 5697 events. 3355/5697 cut-off events. For 604370/604376 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 39073 event pairs, 660 based on Foata normal form. 5/5697 useless extension candidates. Maximal degree in co-relation 40794. Up to 4887 conditions per place. [2024-06-27 19:35:01,473 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 396 selfloop transitions, 154 changer transitions 0/558 dead transitions. [2024-06-27 19:35:01,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 558 transitions, 8928 flow [2024-06-27 19:35:01,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:35:01,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-27 19:35:01,473 INFO L175 Difference]: Start difference. First operand has 391 places, 531 transitions, 7069 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:35:01,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 558 transitions, 8928 flow [2024-06-27 19:35:04,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 558 transitions, 8705 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:04,748 INFO L231 Difference]: Finished difference. Result has 394 places, 537 transitions, 7257 flow [2024-06-27 19:35:04,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6852, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7257, PETRI_PLACES=394, PETRI_TRANSITIONS=537} [2024-06-27 19:35:04,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-27 19:35:04,749 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 537 transitions, 7257 flow [2024-06-27 19:35:04,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:04,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:04,749 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] [2024-06-27 19:35:04,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 19:35:04,749 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:04,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:04,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1668214649, now seen corresponding path program 11 times [2024-06-27 19:35:04,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:04,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269271980] [2024-06-27 19:35:04,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:04,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:04,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:04,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269271980] [2024-06-27 19:35:04,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269271980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:04,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:04,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:35:04,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994752004] [2024-06-27 19:35:04,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:04,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:35:04,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:04,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:35:04,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:35:04,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:04,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 537 transitions, 7257 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:04,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:04,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:04,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:05,885 INFO L124 PetriNetUnfolderBase]: 3352/5672 cut-off events. [2024-06-27 19:35:05,885 INFO L125 PetriNetUnfolderBase]: For 610864/610864 co-relation queries the response was YES. [2024-06-27 19:35:05,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40960 conditions, 5672 events. 3352/5672 cut-off events. For 610864/610864 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 38879 event pairs, 646 based on Foata normal form. 1/5662 useless extension candidates. Maximal degree in co-relation 40781. Up to 4869 conditions per place. [2024-06-27 19:35:05,971 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 416 selfloop transitions, 138 changer transitions 0/562 dead transitions. [2024-06-27 19:35:05,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 562 transitions, 8839 flow [2024-06-27 19:35:05,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:05,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:05,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:35:05,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-27 19:35:05,972 INFO L175 Difference]: Start difference. First operand has 394 places, 537 transitions, 7257 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:35:05,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 562 transitions, 8839 flow [2024-06-27 19:35:08,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 562 transitions, 8600 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 19:35:08,827 INFO L231 Difference]: Finished difference. Result has 397 places, 537 transitions, 7309 flow [2024-06-27 19:35:08,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7018, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7309, PETRI_PLACES=397, PETRI_TRANSITIONS=537} [2024-06-27 19:35:08,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-27 19:35:08,827 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 537 transitions, 7309 flow [2024-06-27 19:35:08,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:08,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:08,828 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] [2024-06-27 19:35:08,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 19:35:08,828 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:08,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:08,829 INFO L85 PathProgramCache]: Analyzing trace with hash 203799975, now seen corresponding path program 12 times [2024-06-27 19:35:08,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:08,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922553437] [2024-06-27 19:35:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:08,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:08,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:08,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922553437] [2024-06-27 19:35:08,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922553437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:08,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:08,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:08,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866948486] [2024-06-27 19:35:08,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:08,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:08,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:08,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:08,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:08,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:08,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 537 transitions, 7309 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:08,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:08,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:08,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:10,103 INFO L124 PetriNetUnfolderBase]: 3370/5722 cut-off events. [2024-06-27 19:35:10,103 INFO L125 PetriNetUnfolderBase]: For 629296/629302 co-relation queries the response was YES. [2024-06-27 19:35:10,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41377 conditions, 5722 events. 3370/5722 cut-off events. For 629296/629302 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 39343 event pairs, 640 based on Foata normal form. 5/5722 useless extension candidates. Maximal degree in co-relation 41196. Up to 5044 conditions per place. [2024-06-27 19:35:10,181 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 481 selfloop transitions, 79 changer transitions 0/568 dead transitions. [2024-06-27 19:35:10,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 568 transitions, 9030 flow [2024-06-27 19:35:10,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:35:10,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:35:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-27 19:35:10,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-27 19:35:10,182 INFO L175 Difference]: Start difference. First operand has 397 places, 537 transitions, 7309 flow. Second operand 10 states and 230 transitions. [2024-06-27 19:35:10,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 568 transitions, 9030 flow [2024-06-27 19:35:13,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 568 transitions, 8720 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:35:13,305 INFO L231 Difference]: Finished difference. Result has 401 places, 546 transitions, 7321 flow [2024-06-27 19:35:13,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7025, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7321, PETRI_PLACES=401, PETRI_TRANSITIONS=546} [2024-06-27 19:35:13,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-27 19:35:13,306 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 546 transitions, 7321 flow [2024-06-27 19:35:13,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:13,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:13,306 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] [2024-06-27 19:35:13,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 19:35:13,306 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:13,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:13,307 INFO L85 PathProgramCache]: Analyzing trace with hash -2043762269, now seen corresponding path program 11 times [2024-06-27 19:35:13,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:13,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930895160] [2024-06-27 19:35:13,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:13,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:13,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:13,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930895160] [2024-06-27 19:35:13,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930895160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:13,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:13,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:13,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809945729] [2024-06-27 19:35:13,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:13,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:13,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:13,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:13,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:13,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:13,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 546 transitions, 7321 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:13,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:13,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:13,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:14,474 INFO L124 PetriNetUnfolderBase]: 3375/5731 cut-off events. [2024-06-27 19:35:14,475 INFO L125 PetriNetUnfolderBase]: For 617726/617732 co-relation queries the response was YES. [2024-06-27 19:35:14,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41127 conditions, 5731 events. 3375/5731 cut-off events. For 617726/617732 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 39410 event pairs, 663 based on Foata normal form. 5/5731 useless extension candidates. Maximal degree in co-relation 40945. Up to 4911 conditions per place. [2024-06-27 19:35:14,559 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 404 selfloop transitions, 158 changer transitions 0/570 dead transitions. [2024-06-27 19:35:14,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 570 transitions, 9146 flow [2024-06-27 19:35:14,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:35:14,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-27 19:35:14,560 INFO L175 Difference]: Start difference. First operand has 401 places, 546 transitions, 7321 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:35:14,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 570 transitions, 9146 flow [2024-06-27 19:35:17,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 570 transitions, 9008 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:17,771 INFO L231 Difference]: Finished difference. Result has 404 places, 549 transitions, 7538 flow [2024-06-27 19:35:17,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7183, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7538, PETRI_PLACES=404, PETRI_TRANSITIONS=549} [2024-06-27 19:35:17,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-27 19:35:17,771 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 549 transitions, 7538 flow [2024-06-27 19:35:17,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:17,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:17,772 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] [2024-06-27 19:35:17,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 19:35:17,772 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:17,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:17,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1010691807, now seen corresponding path program 12 times [2024-06-27 19:35:17,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:17,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040972673] [2024-06-27 19:35:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:17,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:17,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:17,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040972673] [2024-06-27 19:35:17,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040972673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:17,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:17,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:17,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234499336] [2024-06-27 19:35:17,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:17,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:17,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:17,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:17,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:17,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:17,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 549 transitions, 7538 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:17,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:17,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:17,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:18,964 INFO L124 PetriNetUnfolderBase]: 3372/5727 cut-off events. [2024-06-27 19:35:18,964 INFO L125 PetriNetUnfolderBase]: For 625896/625902 co-relation queries the response was YES. [2024-06-27 19:35:19,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41290 conditions, 5727 events. 3372/5727 cut-off events. For 625896/625902 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 39371 event pairs, 666 based on Foata normal form. 5/5727 useless extension candidates. Maximal degree in co-relation 41107. Up to 4908 conditions per place. [2024-06-27 19:35:19,044 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 403 selfloop transitions, 158 changer transitions 0/569 dead transitions. [2024-06-27 19:35:19,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 569 transitions, 9124 flow [2024-06-27 19:35:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:35:19,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-27 19:35:19,044 INFO L175 Difference]: Start difference. First operand has 404 places, 549 transitions, 7538 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:35:19,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 569 transitions, 9124 flow [2024-06-27 19:35:22,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 569 transitions, 8908 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:35:22,352 INFO L231 Difference]: Finished difference. Result has 408 places, 549 transitions, 7644 flow [2024-06-27 19:35:22,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7322, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7644, PETRI_PLACES=408, PETRI_TRANSITIONS=549} [2024-06-27 19:35:22,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-27 19:35:22,353 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 549 transitions, 7644 flow [2024-06-27 19:35:22,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:22,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:22,353 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] [2024-06-27 19:35:22,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 19:35:22,353 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:22,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:22,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1895201537, now seen corresponding path program 4 times [2024-06-27 19:35:22,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:22,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671219832] [2024-06-27 19:35:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:22,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:22,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:22,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671219832] [2024-06-27 19:35:22,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671219832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:22,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:22,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:22,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389600795] [2024-06-27 19:35:22,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:22,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:22,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:22,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:22,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:22,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:22,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 549 transitions, 7644 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:22,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:22,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:22,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:23,538 INFO L124 PetriNetUnfolderBase]: 3428/5815 cut-off events. [2024-06-27 19:35:23,538 INFO L125 PetriNetUnfolderBase]: For 724697/724703 co-relation queries the response was YES. [2024-06-27 19:35:23,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42074 conditions, 5815 events. 3428/5815 cut-off events. For 724697/724703 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 40024 event pairs, 675 based on Foata normal form. 20/5830 useless extension candidates. Maximal degree in co-relation 41889. Up to 4932 conditions per place. [2024-06-27 19:35:23,620 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 406 selfloop transitions, 161 changer transitions 0/575 dead transitions. [2024-06-27 19:35:23,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 575 transitions, 9324 flow [2024-06-27 19:35:23,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:23,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:23,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:35:23,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-27 19:35:23,621 INFO L175 Difference]: Start difference. First operand has 408 places, 549 transitions, 7644 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:35:23,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 575 transitions, 9324 flow [2024-06-27 19:35:27,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 575 transitions, 8878 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 19:35:27,430 INFO L231 Difference]: Finished difference. Result has 407 places, 551 transitions, 7584 flow [2024-06-27 19:35:27,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7198, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7584, PETRI_PLACES=407, PETRI_TRANSITIONS=551} [2024-06-27 19:35:27,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-27 19:35:27,431 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 551 transitions, 7584 flow [2024-06-27 19:35:27,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:27,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:27,431 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] [2024-06-27 19:35:27,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 19:35:27,431 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:27,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:27,432 INFO L85 PathProgramCache]: Analyzing trace with hash -929135927, now seen corresponding path program 5 times [2024-06-27 19:35:27,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:27,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121071980] [2024-06-27 19:35:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:27,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:27,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:27,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121071980] [2024-06-27 19:35:27,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121071980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:27,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:27,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:27,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553951411] [2024-06-27 19:35:27,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:27,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:27,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:27,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:27,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:27,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:27,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 551 transitions, 7584 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:27,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:27,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:27,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:28,679 INFO L124 PetriNetUnfolderBase]: 3484/5911 cut-off events. [2024-06-27 19:35:28,679 INFO L125 PetriNetUnfolderBase]: For 737785/737791 co-relation queries the response was YES. [2024-06-27 19:35:28,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42928 conditions, 5911 events. 3484/5911 cut-off events. For 737785/737791 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 40818 event pairs, 687 based on Foata normal form. 20/5926 useless extension candidates. Maximal degree in co-relation 42743. Up to 5020 conditions per place. [2024-06-27 19:35:28,767 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 409 selfloop transitions, 160 changer transitions 0/577 dead transitions. [2024-06-27 19:35:28,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 577 transitions, 9276 flow [2024-06-27 19:35:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:35:28,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-27 19:35:28,768 INFO L175 Difference]: Start difference. First operand has 407 places, 551 transitions, 7584 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:35:28,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 577 transitions, 9276 flow [2024-06-27 19:35:32,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 577 transitions, 8924 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 19:35:32,153 INFO L231 Difference]: Finished difference. Result has 409 places, 553 transitions, 7620 flow [2024-06-27 19:35:32,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7232, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7620, PETRI_PLACES=409, PETRI_TRANSITIONS=553} [2024-06-27 19:35:32,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-27 19:35:32,154 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 553 transitions, 7620 flow [2024-06-27 19:35:32,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:32,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:32,154 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] [2024-06-27 19:35:32,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 19:35:32,155 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:32,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:32,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1523977157, now seen corresponding path program 6 times [2024-06-27 19:35:32,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:32,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935513112] [2024-06-27 19:35:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:32,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:32,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:32,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935513112] [2024-06-27 19:35:32,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935513112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:32,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:32,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:32,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955868051] [2024-06-27 19:35:32,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:32,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:32,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:32,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:32,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:32,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:32,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 553 transitions, 7620 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:32,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:32,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:32,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:33,572 INFO L124 PetriNetUnfolderBase]: 3540/5999 cut-off events. [2024-06-27 19:35:33,572 INFO L125 PetriNetUnfolderBase]: For 729304/729310 co-relation queries the response was YES. [2024-06-27 19:35:33,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43475 conditions, 5999 events. 3540/5999 cut-off events. For 729304/729310 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 41444 event pairs, 683 based on Foata normal form. 16/6010 useless extension candidates. Maximal degree in co-relation 43289. Up to 4984 conditions per place. [2024-06-27 19:35:33,651 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 411 selfloop transitions, 166 changer transitions 0/585 dead transitions. [2024-06-27 19:35:33,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 585 transitions, 9382 flow [2024-06-27 19:35:33,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:33,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:33,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 19:35:33,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-27 19:35:33,652 INFO L175 Difference]: Start difference. First operand has 409 places, 553 transitions, 7620 flow. Second operand 8 states and 201 transitions. [2024-06-27 19:35:33,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 585 transitions, 9382 flow [2024-06-27 19:35:36,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 585 transitions, 9028 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 19:35:36,984 INFO L231 Difference]: Finished difference. Result has 412 places, 558 transitions, 7719 flow [2024-06-27 19:35:36,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7266, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7719, PETRI_PLACES=412, PETRI_TRANSITIONS=558} [2024-06-27 19:35:36,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-27 19:35:36,985 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 558 transitions, 7719 flow [2024-06-27 19:35:36,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:36,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:36,986 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] [2024-06-27 19:35:36,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 19:35:36,986 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:36,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:36,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1908545921, now seen corresponding path program 1 times [2024-06-27 19:35:36,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:36,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246427620] [2024-06-27 19:35:36,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:36,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:37,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:37,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246427620] [2024-06-27 19:35:37,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246427620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:37,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:37,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:37,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503687133] [2024-06-27 19:35:37,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:37,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:37,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:37,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:37,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:37,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:37,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 558 transitions, 7719 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:37,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:37,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:37,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:38,271 INFO L124 PetriNetUnfolderBase]: 3580/6071 cut-off events. [2024-06-27 19:35:38,271 INFO L125 PetriNetUnfolderBase]: For 742457/742463 co-relation queries the response was YES. [2024-06-27 19:35:38,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43967 conditions, 6071 events. 3580/6071 cut-off events. For 742457/742463 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 42084 event pairs, 695 based on Foata normal form. 16/6082 useless extension candidates. Maximal degree in co-relation 43779. Up to 4984 conditions per place. [2024-06-27 19:35:38,360 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 410 selfloop transitions, 169 changer transitions 0/587 dead transitions. [2024-06-27 19:35:38,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 587 transitions, 9445 flow [2024-06-27 19:35:38,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:38,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:35:38,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:35:38,360 INFO L175 Difference]: Start difference. First operand has 412 places, 558 transitions, 7719 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:35:38,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 587 transitions, 9445 flow [2024-06-27 19:35:41,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 587 transitions, 9072 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:41,782 INFO L231 Difference]: Finished difference. Result has 415 places, 560 transitions, 7743 flow [2024-06-27 19:35:41,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7346, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7743, PETRI_PLACES=415, PETRI_TRANSITIONS=560} [2024-06-27 19:35:41,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-27 19:35:41,783 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 560 transitions, 7743 flow [2024-06-27 19:35:41,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:41,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:41,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:41,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 19:35:41,783 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:41,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:41,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1126017315, now seen corresponding path program 1 times [2024-06-27 19:35:41,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:41,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478421338] [2024-06-27 19:35:41,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:41,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:41,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:41,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478421338] [2024-06-27 19:35:41,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478421338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:41,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:41,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:41,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904803690] [2024-06-27 19:35:41,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:41,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:41,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:41,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:41,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:41,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:41,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 560 transitions, 7743 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:41,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:41,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:41,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:43,099 INFO L124 PetriNetUnfolderBase]: 3588/6080 cut-off events. [2024-06-27 19:35:43,099 INFO L125 PetriNetUnfolderBase]: For 694334/694340 co-relation queries the response was YES. [2024-06-27 19:35:43,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44059 conditions, 6080 events. 3588/6080 cut-off events. For 694334/694340 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 42109 event pairs, 672 based on Foata normal form. 6/6082 useless extension candidates. Maximal degree in co-relation 43870. Up to 5427 conditions per place. [2024-06-27 19:35:43,188 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 506 selfloop transitions, 67 changer transitions 0/581 dead transitions. [2024-06-27 19:35:43,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 581 transitions, 9001 flow [2024-06-27 19:35:43,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:43,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:43,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:35:43,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-27 19:35:43,189 INFO L175 Difference]: Start difference. First operand has 415 places, 560 transitions, 7743 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:35:43,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 581 transitions, 9001 flow [2024-06-27 19:35:47,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 581 transitions, 8626 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:35:47,273 INFO L231 Difference]: Finished difference. Result has 417 places, 562 transitions, 7577 flow [2024-06-27 19:35:47,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7368, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7577, PETRI_PLACES=417, PETRI_TRANSITIONS=562} [2024-06-27 19:35:47,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-27 19:35:47,273 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 562 transitions, 7577 flow [2024-06-27 19:35:47,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:47,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:47,274 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] [2024-06-27 19:35:47,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 19:35:47,274 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:47,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:47,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1908550881, now seen corresponding path program 2 times [2024-06-27 19:35:47,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:47,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875298044] [2024-06-27 19:35:47,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:47,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:47,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:47,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875298044] [2024-06-27 19:35:47,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875298044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:47,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:47,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:47,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140068516] [2024-06-27 19:35:47,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:47,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:47,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:47,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:47,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:47,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:47,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 562 transitions, 7577 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:47,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:47,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:47,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:48,679 INFO L124 PetriNetUnfolderBase]: 3596/6088 cut-off events. [2024-06-27 19:35:48,679 INFO L125 PetriNetUnfolderBase]: For 704523/704529 co-relation queries the response was YES. [2024-06-27 19:35:48,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43787 conditions, 6088 events. 3596/6088 cut-off events. For 704523/704529 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 42093 event pairs, 666 based on Foata normal form. 6/6090 useless extension candidates. Maximal degree in co-relation 43597. Up to 5419 conditions per place. [2024-06-27 19:35:48,771 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 505 selfloop transitions, 72 changer transitions 0/585 dead transitions. [2024-06-27 19:35:48,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 585 transitions, 8851 flow [2024-06-27 19:35:48,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:48,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-27 19:35:48,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-27 19:35:48,772 INFO L175 Difference]: Start difference. First operand has 417 places, 562 transitions, 7577 flow. Second operand 9 states and 208 transitions. [2024-06-27 19:35:48,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 585 transitions, 8851 flow [2024-06-27 19:35:52,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 585 transitions, 8658 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 19:35:52,373 INFO L231 Difference]: Finished difference. Result has 420 places, 564 transitions, 7607 flow [2024-06-27 19:35:52,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7384, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7607, PETRI_PLACES=420, PETRI_TRANSITIONS=564} [2024-06-27 19:35:52,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-27 19:35:52,373 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 564 transitions, 7607 flow [2024-06-27 19:35:52,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:52,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:52,374 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] [2024-06-27 19:35:52,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 19:35:52,374 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:52,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:52,374 INFO L85 PathProgramCache]: Analyzing trace with hash -6172215, now seen corresponding path program 13 times [2024-06-27 19:35:52,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:52,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258673375] [2024-06-27 19:35:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:52,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:52,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:52,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258673375] [2024-06-27 19:35:52,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258673375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:52,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:52,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:35:52,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888530593] [2024-06-27 19:35:52,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:52,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:35:52,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:52,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:35:52,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:35:52,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:52,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 564 transitions, 7607 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:52,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:52,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:52,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:53,609 INFO L124 PetriNetUnfolderBase]: 3617/6126 cut-off events. [2024-06-27 19:35:53,609 INFO L125 PetriNetUnfolderBase]: For 724180/724186 co-relation queries the response was YES. [2024-06-27 19:35:53,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44274 conditions, 6126 events. 3617/6126 cut-off events. For 724180/724186 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 42444 event pairs, 721 based on Foata normal form. 1/6120 useless extension candidates. Maximal degree in co-relation 44083. Up to 5226 conditions per place. [2024-06-27 19:35:53,701 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 429 selfloop transitions, 165 changer transitions 0/602 dead transitions. [2024-06-27 19:35:53,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 602 transitions, 9639 flow [2024-06-27 19:35:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:53,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:53,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:35:53,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-27 19:35:53,702 INFO L175 Difference]: Start difference. First operand has 420 places, 564 transitions, 7607 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:35:53,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 602 transitions, 9639 flow [2024-06-27 19:35:57,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 602 transitions, 9432 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 19:35:57,728 INFO L231 Difference]: Finished difference. Result has 420 places, 573 transitions, 7842 flow [2024-06-27 19:35:57,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7400, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7842, PETRI_PLACES=420, PETRI_TRANSITIONS=573} [2024-06-27 19:35:57,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-27 19:35:57,728 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 573 transitions, 7842 flow [2024-06-27 19:35:57,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:57,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:57,728 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] [2024-06-27 19:35:57,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 19:35:57,728 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:57,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:57,729 INFO L85 PathProgramCache]: Analyzing trace with hash -6052245, now seen corresponding path program 14 times [2024-06-27 19:35:57,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:57,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912369032] [2024-06-27 19:35:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:57,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:57,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:57,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912369032] [2024-06-27 19:35:57,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912369032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:57,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:57,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:35:57,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808255092] [2024-06-27 19:35:57,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:57,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:35:57,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:57,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:35:57,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:35:57,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:57,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 573 transitions, 7842 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:57,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:57,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:57,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:59,048 INFO L124 PetriNetUnfolderBase]: 3614/6124 cut-off events. [2024-06-27 19:35:59,049 INFO L125 PetriNetUnfolderBase]: For 730094/730100 co-relation queries the response was YES. [2024-06-27 19:35:59,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44386 conditions, 6124 events. 3614/6124 cut-off events. For 730094/730100 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 42479 event pairs, 681 based on Foata normal form. 5/6124 useless extension candidates. Maximal degree in co-relation 44194. Up to 5437 conditions per place. [2024-06-27 19:35:59,138 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 516 selfloop transitions, 72 changer transitions 0/596 dead transitions. [2024-06-27 19:35:59,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 596 transitions, 9076 flow [2024-06-27 19:35:59,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:59,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:35:59,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:35:59,139 INFO L175 Difference]: Start difference. First operand has 420 places, 573 transitions, 7842 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:35:59,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 596 transitions, 9076 flow [2024-06-27 19:36:03,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 596 transitions, 8712 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 19:36:03,565 INFO L231 Difference]: Finished difference. Result has 423 places, 573 transitions, 7628 flow [2024-06-27 19:36:03,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7478, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7628, PETRI_PLACES=423, PETRI_TRANSITIONS=573} [2024-06-27 19:36:03,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-27 19:36:03,566 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 573 transitions, 7628 flow [2024-06-27 19:36:03,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:03,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:03,566 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] [2024-06-27 19:36:03,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 19:36:03,567 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:03,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:03,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1515689447, now seen corresponding path program 15 times [2024-06-27 19:36:03,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:03,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073448978] [2024-06-27 19:36:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:03,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:03,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:03,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073448978] [2024-06-27 19:36:03,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073448978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:03,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:03,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:03,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690291099] [2024-06-27 19:36:03,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:03,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:03,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:03,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:03,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:03,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:03,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 573 transitions, 7628 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:03,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:03,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:03,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:04,816 INFO L124 PetriNetUnfolderBase]: 3635/6145 cut-off events. [2024-06-27 19:36:04,816 INFO L125 PetriNetUnfolderBase]: For 756048/756054 co-relation queries the response was YES. [2024-06-27 19:36:04,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44596 conditions, 6145 events. 3635/6145 cut-off events. For 756048/756054 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 42611 event pairs, 714 based on Foata normal form. 5/6139 useless extension candidates. Maximal degree in co-relation 44403. Up to 5247 conditions per place. [2024-06-27 19:36:04,910 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 426 selfloop transitions, 170 changer transitions 0/604 dead transitions. [2024-06-27 19:36:04,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 604 transitions, 9426 flow [2024-06-27 19:36:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:04,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:04,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:36:04,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-27 19:36:04,911 INFO L175 Difference]: Start difference. First operand has 423 places, 573 transitions, 7628 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:36:04,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 604 transitions, 9426 flow [2024-06-27 19:36:09,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 604 transitions, 9270 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:36:09,712 INFO L231 Difference]: Finished difference. Result has 423 places, 582 transitions, 7918 flow [2024-06-27 19:36:09,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7472, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7918, PETRI_PLACES=423, PETRI_TRANSITIONS=582} [2024-06-27 19:36:09,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-27 19:36:09,712 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 582 transitions, 7918 flow [2024-06-27 19:36:09,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:09,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:09,713 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] [2024-06-27 19:36:09,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 19:36:09,713 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:09,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:09,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1515333257, now seen corresponding path program 16 times [2024-06-27 19:36:09,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:09,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967041654] [2024-06-27 19:36:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:09,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:09,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:09,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967041654] [2024-06-27 19:36:09,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967041654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:09,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:09,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:09,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812188047] [2024-06-27 19:36:09,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:09,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:09,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:09,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:09,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:09,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:09,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 582 transitions, 7918 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:09,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:09,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:09,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:11,015 INFO L124 PetriNetUnfolderBase]: 3640/6154 cut-off events. [2024-06-27 19:36:11,016 INFO L125 PetriNetUnfolderBase]: For 768781/768787 co-relation queries the response was YES. [2024-06-27 19:36:11,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45012 conditions, 6154 events. 3640/6154 cut-off events. For 768781/768787 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 42733 event pairs, 716 based on Foata normal form. 5/6148 useless extension candidates. Maximal degree in co-relation 44818. Up to 5253 conditions per place. [2024-06-27 19:36:11,119 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 426 selfloop transitions, 170 changer transitions 0/604 dead transitions. [2024-06-27 19:36:11,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 604 transitions, 9652 flow [2024-06-27 19:36:11,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:11,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:11,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:36:11,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-27 19:36:11,120 INFO L175 Difference]: Start difference. First operand has 423 places, 582 transitions, 7918 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:36:11,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 604 transitions, 9652 flow [2024-06-27 19:36:15,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 604 transitions, 9388 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 19:36:15,758 INFO L231 Difference]: Finished difference. Result has 427 places, 585 transitions, 8040 flow [2024-06-27 19:36:15,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7665, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8040, PETRI_PLACES=427, PETRI_TRANSITIONS=585} [2024-06-27 19:36:15,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-27 19:36:15,759 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 585 transitions, 8040 flow [2024-06-27 19:36:15,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:15,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:15,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:15,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 19:36:15,759 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:15,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:15,760 INFO L85 PathProgramCache]: Analyzing trace with hash 899891205, now seen corresponding path program 17 times [2024-06-27 19:36:15,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:15,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052939194] [2024-06-27 19:36:15,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:15,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:15,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:15,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052939194] [2024-06-27 19:36:15,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052939194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:15,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:15,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:15,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250348898] [2024-06-27 19:36:15,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:15,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:15,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:15,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:15,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:15,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:15,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 585 transitions, 8040 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:15,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:15,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:15,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:17,238 INFO L124 PetriNetUnfolderBase]: 3637/6150 cut-off events. [2024-06-27 19:36:17,238 INFO L125 PetriNetUnfolderBase]: For 775530/775536 co-relation queries the response was YES. [2024-06-27 19:36:17,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45001 conditions, 6150 events. 3637/6150 cut-off events. For 775530/775536 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 42655 event pairs, 716 based on Foata normal form. 5/6144 useless extension candidates. Maximal degree in co-relation 44806. Up to 5250 conditions per place. [2024-06-27 19:36:17,330 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 419 selfloop transitions, 174 changer transitions 0/601 dead transitions. [2024-06-27 19:36:17,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 601 transitions, 9724 flow [2024-06-27 19:36:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:17,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:17,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:36:17,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:36:17,331 INFO L175 Difference]: Start difference. First operand has 427 places, 585 transitions, 8040 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:36:17,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 601 transitions, 9724 flow [2024-06-27 19:36:22,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 601 transitions, 9395 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:36:22,178 INFO L231 Difference]: Finished difference. Result has 430 places, 585 transitions, 8065 flow [2024-06-27 19:36:22,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7711, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8065, PETRI_PLACES=430, PETRI_TRANSITIONS=585} [2024-06-27 19:36:22,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-27 19:36:22,178 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 585 transitions, 8065 flow [2024-06-27 19:36:22,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:22,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:22,178 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] [2024-06-27 19:36:22,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 19:36:22,178 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:22,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:22,179 INFO L85 PathProgramCache]: Analyzing trace with hash -329455613, now seen corresponding path program 18 times [2024-06-27 19:36:22,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:22,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316345569] [2024-06-27 19:36:22,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:22,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:22,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:22,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316345569] [2024-06-27 19:36:22,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316345569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:22,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:22,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:22,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29458077] [2024-06-27 19:36:22,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:22,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:22,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:22,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:22,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:22,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:22,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 585 transitions, 8065 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:22,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:22,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:22,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:23,448 INFO L124 PetriNetUnfolderBase]: 3642/6169 cut-off events. [2024-06-27 19:36:23,448 INFO L125 PetriNetUnfolderBase]: For 786956/786962 co-relation queries the response was YES. [2024-06-27 19:36:23,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45174 conditions, 6169 events. 3642/6169 cut-off events. For 786956/786962 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 42843 event pairs, 723 based on Foata normal form. 1/6163 useless extension candidates. Maximal degree in co-relation 44978. Up to 5256 conditions per place. [2024-06-27 19:36:23,543 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 432 selfloop transitions, 175 changer transitions 0/615 dead transitions. [2024-06-27 19:36:23,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 615 transitions, 10308 flow [2024-06-27 19:36:23,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:23,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:36:23,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:36:23,544 INFO L175 Difference]: Start difference. First operand has 430 places, 585 transitions, 8065 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:36:23,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 615 transitions, 10308 flow [2024-06-27 19:36:28,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 615 transitions, 9915 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:36:28,335 INFO L231 Difference]: Finished difference. Result has 432 places, 588 transitions, 8063 flow [2024-06-27 19:36:28,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7685, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8063, PETRI_PLACES=432, PETRI_TRANSITIONS=588} [2024-06-27 19:36:28,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-27 19:36:28,336 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 588 transitions, 8063 flow [2024-06-27 19:36:28,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:28,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:28,336 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] [2024-06-27 19:36:28,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 19:36:28,336 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:28,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:28,337 INFO L85 PathProgramCache]: Analyzing trace with hash 203605095, now seen corresponding path program 19 times [2024-06-27 19:36:28,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:28,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541636130] [2024-06-27 19:36:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:28,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:28,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:28,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541636130] [2024-06-27 19:36:28,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541636130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:28,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:28,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:28,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464436355] [2024-06-27 19:36:28,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:28,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:28,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:28,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:28,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:28,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:28,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 588 transitions, 8063 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:28,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:28,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:28,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:29,981 INFO L124 PetriNetUnfolderBase]: 3639/6165 cut-off events. [2024-06-27 19:36:29,981 INFO L125 PetriNetUnfolderBase]: For 792461/792467 co-relation queries the response was YES. [2024-06-27 19:36:30,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45014 conditions, 6165 events. 3639/6165 cut-off events. For 792461/792467 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 42809 event pairs, 723 based on Foata normal form. 1/6159 useless extension candidates. Maximal degree in co-relation 44818. Up to 5253 conditions per place. [2024-06-27 19:36:30,065 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 430 selfloop transitions, 173 changer transitions 0/611 dead transitions. [2024-06-27 19:36:30,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 611 transitions, 10027 flow [2024-06-27 19:36:30,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:30,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:30,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:36:30,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:36:30,066 INFO L175 Difference]: Start difference. First operand has 432 places, 588 transitions, 8063 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:36:30,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 611 transitions, 10027 flow [2024-06-27 19:36:35,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 611 transitions, 9517 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:36:35,276 INFO L231 Difference]: Finished difference. Result has 433 places, 588 transitions, 7905 flow [2024-06-27 19:36:35,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7553, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7905, PETRI_PLACES=433, PETRI_TRANSITIONS=588} [2024-06-27 19:36:35,276 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-27 19:36:35,276 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 588 transitions, 7905 flow [2024-06-27 19:36:35,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:35,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:35,276 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] [2024-06-27 19:36:35,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 19:36:35,276 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:35,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:35,277 INFO L85 PathProgramCache]: Analyzing trace with hash -930164785, now seen corresponding path program 20 times [2024-06-27 19:36:35,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:35,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745206091] [2024-06-27 19:36:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:35,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:35,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:35,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745206091] [2024-06-27 19:36:35,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745206091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:35,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:35,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:35,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306693221] [2024-06-27 19:36:35,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:35,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:35,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:35,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:35,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:35,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:35,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 588 transitions, 7905 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:35,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:35,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:35,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:36,912 INFO L124 PetriNetUnfolderBase]: 3636/6163 cut-off events. [2024-06-27 19:36:36,913 INFO L125 PetriNetUnfolderBase]: For 796795/796801 co-relation queries the response was YES. [2024-06-27 19:36:36,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44878 conditions, 6163 events. 3636/6163 cut-off events. For 796795/796801 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 42829 event pairs, 683 based on Foata normal form. 5/6163 useless extension candidates. Maximal degree in co-relation 44681. Up to 5458 conditions per place. [2024-06-27 19:36:36,996 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 521 selfloop transitions, 79 changer transitions 0/608 dead transitions. [2024-06-27 19:36:36,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 608 transitions, 9389 flow [2024-06-27 19:36:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:36:36,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:36:36,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-27 19:36:36,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-27 19:36:36,997 INFO L175 Difference]: Start difference. First operand has 433 places, 588 transitions, 7905 flow. Second operand 9 states and 210 transitions. [2024-06-27 19:36:36,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 608 transitions, 9389 flow [2024-06-27 19:36:41,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 608 transitions, 9041 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 19:36:41,837 INFO L231 Difference]: Finished difference. Result has 437 places, 588 transitions, 7721 flow [2024-06-27 19:36:41,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7557, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7721, PETRI_PLACES=437, PETRI_TRANSITIONS=588} [2024-06-27 19:36:41,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-27 19:36:41,837 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 588 transitions, 7721 flow [2024-06-27 19:36:41,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:41,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:41,837 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] [2024-06-27 19:36:41,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 19:36:41,837 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:41,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:41,838 INFO L85 PathProgramCache]: Analyzing trace with hash 318896265, now seen corresponding path program 21 times [2024-06-27 19:36:41,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:41,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104931647] [2024-06-27 19:36:41,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:41,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:41,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:41,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104931647] [2024-06-27 19:36:41,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104931647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:41,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:41,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:41,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609727866] [2024-06-27 19:36:41,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:41,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:41,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:41,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:41,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:41,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:41,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 588 transitions, 7721 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:41,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:41,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:41,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:43,496 INFO L124 PetriNetUnfolderBase]: 3633/6159 cut-off events. [2024-06-27 19:36:43,496 INFO L125 PetriNetUnfolderBase]: For 802303/802309 co-relation queries the response was YES. [2024-06-27 19:36:43,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44616 conditions, 6159 events. 3633/6159 cut-off events. For 802303/802309 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 42816 event pairs, 681 based on Foata normal form. 5/6159 useless extension candidates. Maximal degree in co-relation 44418. Up to 5455 conditions per place. [2024-06-27 19:36:43,593 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 519 selfloop transitions, 78 changer transitions 0/605 dead transitions. [2024-06-27 19:36:43,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 605 transitions, 8957 flow [2024-06-27 19:36:43,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:43,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:36:43,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-27 19:36:43,595 INFO L175 Difference]: Start difference. First operand has 437 places, 588 transitions, 7721 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:36:43,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 605 transitions, 8957 flow [2024-06-27 19:36:48,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 605 transitions, 8791 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:36:48,753 INFO L231 Difference]: Finished difference. Result has 437 places, 588 transitions, 7717 flow [2024-06-27 19:36:48,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7555, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7717, PETRI_PLACES=437, PETRI_TRANSITIONS=588} [2024-06-27 19:36:48,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-27 19:36:48,753 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 588 transitions, 7717 flow [2024-06-27 19:36:48,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:48,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:48,754 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] [2024-06-27 19:36:48,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 19:36:48,754 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:48,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:48,754 INFO L85 PathProgramCache]: Analyzing trace with hash 371890501, now seen corresponding path program 22 times [2024-06-27 19:36:48,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:48,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066338435] [2024-06-27 19:36:48,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:48,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:48,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:48,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066338435] [2024-06-27 19:36:48,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066338435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:48,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:48,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:48,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167375029] [2024-06-27 19:36:48,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:48,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:48,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:48,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:48,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:48,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:48,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 588 transitions, 7717 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:48,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:48,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:48,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:50,431 INFO L124 PetriNetUnfolderBase]: 3630/6143 cut-off events. [2024-06-27 19:36:50,432 INFO L125 PetriNetUnfolderBase]: For 809314/809320 co-relation queries the response was YES. [2024-06-27 19:36:50,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44569 conditions, 6143 events. 3630/6143 cut-off events. For 809314/809320 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 42691 event pairs, 714 based on Foata normal form. 5/6137 useless extension candidates. Maximal degree in co-relation 44370. Up to 5289 conditions per place. [2024-06-27 19:36:50,525 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 457 selfloop transitions, 143 changer transitions 0/608 dead transitions. [2024-06-27 19:36:50,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 608 transitions, 9207 flow [2024-06-27 19:36:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:36:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:36:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 19:36:50,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-27 19:36:50,526 INFO L175 Difference]: Start difference. First operand has 437 places, 588 transitions, 7717 flow. Second operand 6 states and 154 transitions. [2024-06-27 19:36:50,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 608 transitions, 9207 flow [2024-06-27 19:36:55,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 608 transitions, 9047 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:36:55,594 INFO L231 Difference]: Finished difference. Result has 437 places, 588 transitions, 7854 flow [2024-06-27 19:36:55,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7557, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7854, PETRI_PLACES=437, PETRI_TRANSITIONS=588} [2024-06-27 19:36:55,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-27 19:36:55,594 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 588 transitions, 7854 flow [2024-06-27 19:36:55,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:55,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:55,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:55,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 19:36:55,595 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:55,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:55,596 INFO L85 PathProgramCache]: Analyzing trace with hash 111227469, now seen corresponding path program 23 times [2024-06-27 19:36:55,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:55,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458026968] [2024-06-27 19:36:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:55,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:55,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:55,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458026968] [2024-06-27 19:36:55,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458026968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:55,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:55,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:55,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811760485] [2024-06-27 19:36:55,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:55,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:55,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:55,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:55,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:55,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:55,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 588 transitions, 7854 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:55,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:55,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:55,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:57,270 INFO L124 PetriNetUnfolderBase]: 3627/6151 cut-off events. [2024-06-27 19:36:57,270 INFO L125 PetriNetUnfolderBase]: For 813806/813812 co-relation queries the response was YES. [2024-06-27 19:36:57,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44744 conditions, 6151 events. 3627/6151 cut-off events. For 813806/813812 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 42757 event pairs, 681 based on Foata normal form. 5/6151 useless extension candidates. Maximal degree in co-relation 44544. Up to 5286 conditions per place. [2024-06-27 19:36:57,358 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 456 selfloop transitions, 156 changer transitions 0/620 dead transitions. [2024-06-27 19:36:57,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 620 transitions, 9642 flow [2024-06-27 19:36:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:57,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 19:36:57,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:36:57,359 INFO L175 Difference]: Start difference. First operand has 437 places, 588 transitions, 7854 flow. Second operand 8 states and 208 transitions. [2024-06-27 19:36:57,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 620 transitions, 9642 flow [2024-06-27 19:37:02,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 620 transitions, 9261 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:02,683 INFO L231 Difference]: Finished difference. Result has 437 places, 588 transitions, 7804 flow [2024-06-27 19:37:02,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7477, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7804, PETRI_PLACES=437, PETRI_TRANSITIONS=588} [2024-06-27 19:37:02,684 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-27 19:37:02,684 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 588 transitions, 7804 flow [2024-06-27 19:37:02,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:02,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:02,684 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] [2024-06-27 19:37:02,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 19:37:02,685 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:02,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:02,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1613206385, now seen corresponding path program 24 times [2024-06-27 19:37:02,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:02,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714854658] [2024-06-27 19:37:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:02,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:02,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:02,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714854658] [2024-06-27 19:37:02,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714854658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:02,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:02,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:37:02,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620383623] [2024-06-27 19:37:02,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:02,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:37:02,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:02,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:37:02,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:37:02,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:02,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 588 transitions, 7804 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:02,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:02,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:02,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:04,342 INFO L124 PetriNetUnfolderBase]: 3624/6147 cut-off events. [2024-06-27 19:37:04,342 INFO L125 PetriNetUnfolderBase]: For 806083/806089 co-relation queries the response was YES. [2024-06-27 19:37:04,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44602 conditions, 6147 events. 3624/6147 cut-off events. For 806083/806089 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 42744 event pairs, 681 based on Foata normal form. 5/6147 useless extension candidates. Maximal degree in co-relation 44402. Up to 5283 conditions per place. [2024-06-27 19:37:04,430 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 455 selfloop transitions, 163 changer transitions 0/626 dead transitions. [2024-06-27 19:37:04,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 626 transitions, 9378 flow [2024-06-27 19:37:04,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:04,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-27 19:37:04,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-27 19:37:04,431 INFO L175 Difference]: Start difference. First operand has 437 places, 588 transitions, 7804 flow. Second operand 9 states and 231 transitions. [2024-06-27 19:37:04,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 626 transitions, 9378 flow [2024-06-27 19:37:09,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 626 transitions, 9005 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 19:37:09,658 INFO L231 Difference]: Finished difference. Result has 436 places, 588 transitions, 7779 flow [2024-06-27 19:37:09,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7435, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7779, PETRI_PLACES=436, PETRI_TRANSITIONS=588} [2024-06-27 19:37:09,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-27 19:37:09,658 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 588 transitions, 7779 flow [2024-06-27 19:37:09,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:09,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:09,659 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] [2024-06-27 19:37:09,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 19:37:09,659 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:09,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:09,659 INFO L85 PathProgramCache]: Analyzing trace with hash 543665407, now seen corresponding path program 13 times [2024-06-27 19:37:09,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:09,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010880365] [2024-06-27 19:37:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:09,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:09,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:09,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010880365] [2024-06-27 19:37:09,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010880365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:09,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:09,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:09,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231871897] [2024-06-27 19:37:09,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:09,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:09,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:09,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:09,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:09,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:09,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 588 transitions, 7779 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:09,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:09,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:09,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:11,208 INFO L124 PetriNetUnfolderBase]: 3629/6135 cut-off events. [2024-06-27 19:37:11,208 INFO L125 PetriNetUnfolderBase]: For 792399/792399 co-relation queries the response was YES. [2024-06-27 19:37:11,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44542 conditions, 6135 events. 3629/6135 cut-off events. For 792399/792399 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 42576 event pairs, 707 based on Foata normal form. 1/6125 useless extension candidates. Maximal degree in co-relation 44343. Up to 5306 conditions per place. [2024-06-27 19:37:11,295 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 436 selfloop transitions, 164 changer transitions 0/608 dead transitions. [2024-06-27 19:37:11,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 608 transitions, 9543 flow [2024-06-27 19:37:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:11,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:37:11,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-27 19:37:11,296 INFO L175 Difference]: Start difference. First operand has 436 places, 588 transitions, 7779 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:37:11,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 608 transitions, 9543 flow [2024-06-27 19:37:16,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 608 transitions, 9187 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-27 19:37:16,263 INFO L231 Difference]: Finished difference. Result has 433 places, 591 transitions, 7813 flow [2024-06-27 19:37:16,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7435, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7813, PETRI_PLACES=433, PETRI_TRANSITIONS=591} [2024-06-27 19:37:16,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-27 19:37:16,263 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 591 transitions, 7813 flow [2024-06-27 19:37:16,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:16,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:16,263 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] [2024-06-27 19:37:16,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 19:37:16,263 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:16,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:16,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1311995427, now seen corresponding path program 14 times [2024-06-27 19:37:16,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:16,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176907291] [2024-06-27 19:37:16,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:16,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:16,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:16,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176907291] [2024-06-27 19:37:16,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176907291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:16,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:16,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:37:16,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180120955] [2024-06-27 19:37:16,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:16,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:37:16,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:16,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:37:16,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:37:16,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:16,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 591 transitions, 7813 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:16,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:16,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:16,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:18,009 INFO L124 PetriNetUnfolderBase]: 3626/6149 cut-off events. [2024-06-27 19:37:18,009 INFO L125 PetriNetUnfolderBase]: For 757589/757589 co-relation queries the response was YES. [2024-06-27 19:37:18,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44153 conditions, 6149 events. 3626/6149 cut-off events. For 757589/757589 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 42711 event pairs, 654 based on Foata normal form. 1/6148 useless extension candidates. Maximal degree in co-relation 43956. Up to 5430 conditions per place. [2024-06-27 19:37:18,094 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 517 selfloop transitions, 89 changer transitions 0/614 dead transitions. [2024-06-27 19:37:18,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 614 transitions, 9319 flow [2024-06-27 19:37:18,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:37:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:37:18,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-27 19:37:18,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-27 19:37:18,095 INFO L175 Difference]: Start difference. First operand has 433 places, 591 transitions, 7813 flow. Second operand 6 states and 160 transitions. [2024-06-27 19:37:18,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 614 transitions, 9319 flow [2024-06-27 19:37:22,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 614 transitions, 9130 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:37:22,907 INFO L231 Difference]: Finished difference. Result has 435 places, 591 transitions, 7823 flow [2024-06-27 19:37:22,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7624, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7823, PETRI_PLACES=435, PETRI_TRANSITIONS=591} [2024-06-27 19:37:22,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-27 19:37:22,907 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 591 transitions, 7823 flow [2024-06-27 19:37:22,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:22,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:22,907 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] [2024-06-27 19:37:22,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 19:37:22,908 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:22,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:22,908 INFO L85 PathProgramCache]: Analyzing trace with hash -853531963, now seen corresponding path program 15 times [2024-06-27 19:37:22,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:22,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493319268] [2024-06-27 19:37:22,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:22,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:23,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:23,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493319268] [2024-06-27 19:37:23,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493319268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:23,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:23,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:23,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434341164] [2024-06-27 19:37:23,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:23,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:23,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:23,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:23,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:23,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:23,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 591 transitions, 7823 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:23,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:23,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:23,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:24,477 INFO L124 PetriNetUnfolderBase]: 3623/6127 cut-off events. [2024-06-27 19:37:24,477 INFO L125 PetriNetUnfolderBase]: For 767028/767028 co-relation queries the response was YES. [2024-06-27 19:37:24,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43996 conditions, 6127 events. 3623/6127 cut-off events. For 767028/767028 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 42540 event pairs, 705 based on Foata normal form. 1/6117 useless extension candidates. Maximal degree in co-relation 43797. Up to 5300 conditions per place. [2024-06-27 19:37:24,562 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 431 selfloop transitions, 168 changer transitions 0/607 dead transitions. [2024-06-27 19:37:24,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 607 transitions, 9535 flow [2024-06-27 19:37:24,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:37:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:37:24,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:37:24,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-27 19:37:24,563 INFO L175 Difference]: Start difference. First operand has 435 places, 591 transitions, 7823 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:37:24,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 607 transitions, 9535 flow [2024-06-27 19:37:29,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 607 transitions, 9334 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:37:29,552 INFO L231 Difference]: Finished difference. Result has 437 places, 591 transitions, 7972 flow [2024-06-27 19:37:29,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7626, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7972, PETRI_PLACES=437, PETRI_TRANSITIONS=591} [2024-06-27 19:37:29,552 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-27 19:37:29,552 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 591 transitions, 7972 flow [2024-06-27 19:37:29,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:29,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:29,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:29,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 19:37:29,553 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:29,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:29,553 INFO L85 PathProgramCache]: Analyzing trace with hash -396034881, now seen corresponding path program 16 times [2024-06-27 19:37:29,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:29,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317208698] [2024-06-27 19:37:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:29,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:29,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:29,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317208698] [2024-06-27 19:37:29,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317208698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:29,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:29,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:29,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733975906] [2024-06-27 19:37:29,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:29,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:29,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:29,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:29,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:29,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:29,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 591 transitions, 7972 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:29,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:29,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:29,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:31,024 INFO L124 PetriNetUnfolderBase]: 3620/6144 cut-off events. [2024-06-27 19:37:31,024 INFO L125 PetriNetUnfolderBase]: For 762337/762343 co-relation queries the response was YES. [2024-06-27 19:37:31,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44036 conditions, 6144 events. 3620/6144 cut-off events. For 762337/762343 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 42745 event pairs, 699 based on Foata normal form. 5/6144 useless extension candidates. Maximal degree in co-relation 43837. Up to 5297 conditions per place. [2024-06-27 19:37:31,111 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 438 selfloop transitions, 164 changer transitions 0/610 dead transitions. [2024-06-27 19:37:31,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 610 transitions, 9698 flow [2024-06-27 19:37:31,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:37:31,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:37:31,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:37:31,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-27 19:37:31,112 INFO L175 Difference]: Start difference. First operand has 437 places, 591 transitions, 7972 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:37:31,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 610 transitions, 9698 flow [2024-06-27 19:37:35,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 610 transitions, 9247 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:35,655 INFO L231 Difference]: Finished difference. Result has 436 places, 591 transitions, 7863 flow [2024-06-27 19:37:35,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7525, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7863, PETRI_PLACES=436, PETRI_TRANSITIONS=591} [2024-06-27 19:37:35,655 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-27 19:37:35,655 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 591 transitions, 7863 flow [2024-06-27 19:37:35,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:35,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:35,656 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] [2024-06-27 19:37:35,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 19:37:35,656 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:35,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:35,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1590868109, now seen corresponding path program 17 times [2024-06-27 19:37:35,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:35,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235470861] [2024-06-27 19:37:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:35,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:35,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:35,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235470861] [2024-06-27 19:37:35,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235470861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:35,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:35,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:35,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160791227] [2024-06-27 19:37:35,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:35,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:35,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:35,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:35,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:35,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:35,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 591 transitions, 7863 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:35,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:35,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:35,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:37,162 INFO L124 PetriNetUnfolderBase]: 3625/6151 cut-off events. [2024-06-27 19:37:37,163 INFO L125 PetriNetUnfolderBase]: For 761422/761428 co-relation queries the response was YES. [2024-06-27 19:37:37,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44013 conditions, 6151 events. 3625/6151 cut-off events. For 761422/761428 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42852 event pairs, 706 based on Foata normal form. 5/6151 useless extension candidates. Maximal degree in co-relation 43814. Up to 5303 conditions per place. [2024-06-27 19:37:37,471 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 437 selfloop transitions, 167 changer transitions 0/612 dead transitions. [2024-06-27 19:37:37,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 612 transitions, 9409 flow [2024-06-27 19:37:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:37:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:37:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:37:37,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-27 19:37:37,472 INFO L175 Difference]: Start difference. First operand has 436 places, 591 transitions, 7863 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:37:37,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 612 transitions, 9409 flow [2024-06-27 19:37:42,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 612 transitions, 8791 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:42,331 INFO L231 Difference]: Finished difference. Result has 434 places, 594 transitions, 7647 flow [2024-06-27 19:37:42,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7270, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7647, PETRI_PLACES=434, PETRI_TRANSITIONS=594} [2024-06-27 19:37:42,332 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-27 19:37:42,332 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 594 transitions, 7647 flow [2024-06-27 19:37:42,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:42,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:42,333 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] [2024-06-27 19:37:42,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 19:37:42,333 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:42,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:42,333 INFO L85 PathProgramCache]: Analyzing trace with hash -771931581, now seen corresponding path program 18 times [2024-06-27 19:37:42,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:42,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341003992] [2024-06-27 19:37:42,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:42,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:42,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:42,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341003992] [2024-06-27 19:37:42,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341003992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:42,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:42,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:42,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661173931] [2024-06-27 19:37:42,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:42,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:42,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:42,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:42,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:42,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:42,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 594 transitions, 7647 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:42,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:42,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:42,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:44,026 INFO L124 PetriNetUnfolderBase]: 3622/6146 cut-off events. [2024-06-27 19:37:44,026 INFO L125 PetriNetUnfolderBase]: For 750232/750238 co-relation queries the response was YES. [2024-06-27 19:37:44,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43610 conditions, 6146 events. 3622/6146 cut-off events. For 750232/750238 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42721 event pairs, 690 based on Foata normal form. 5/6147 useless extension candidates. Maximal degree in co-relation 43412. Up to 5300 conditions per place. [2024-06-27 19:37:44,111 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 441 selfloop transitions, 172 changer transitions 0/621 dead transitions. [2024-06-27 19:37:44,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 621 transitions, 9179 flow [2024-06-27 19:37:44,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:37:44,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:37:44,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 19:37:44,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-27 19:37:44,112 INFO L175 Difference]: Start difference. First operand has 434 places, 594 transitions, 7647 flow. Second operand 7 states and 183 transitions. [2024-06-27 19:37:44,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 621 transitions, 9179 flow [2024-06-27 19:37:48,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 621 transitions, 8938 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:37:48,626 INFO L231 Difference]: Finished difference. Result has 436 places, 594 transitions, 7770 flow [2024-06-27 19:37:48,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7408, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7770, PETRI_PLACES=436, PETRI_TRANSITIONS=594} [2024-06-27 19:37:48,626 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-27 19:37:48,626 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 594 transitions, 7770 flow [2024-06-27 19:37:48,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:48,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:48,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:48,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 19:37:48,627 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:48,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:48,627 INFO L85 PathProgramCache]: Analyzing trace with hash -477148113, now seen corresponding path program 25 times [2024-06-27 19:37:48,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:48,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223593931] [2024-06-27 19:37:48,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:48,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:48,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:48,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223593931] [2024-06-27 19:37:48,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223593931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:48,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:48,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:48,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19887219] [2024-06-27 19:37:48,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:48,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:48,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:48,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:48,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:48,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:48,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 594 transitions, 7770 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:48,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:48,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:48,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:50,279 INFO L124 PetriNetUnfolderBase]: 3619/6142 cut-off events. [2024-06-27 19:37:50,279 INFO L125 PetriNetUnfolderBase]: For 744714/744720 co-relation queries the response was YES. [2024-06-27 19:37:50,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43529 conditions, 6142 events. 3619/6142 cut-off events. For 744714/744720 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42731 event pairs, 673 based on Foata normal form. 5/6143 useless extension candidates. Maximal degree in co-relation 43330. Up to 5278 conditions per place. [2024-06-27 19:37:50,360 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 464 selfloop transitions, 163 changer transitions 0/635 dead transitions. [2024-06-27 19:37:50,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 635 transitions, 9128 flow [2024-06-27 19:37:50,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:37:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:37:50,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-27 19:37:50,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170731707317073 [2024-06-27 19:37:50,361 INFO L175 Difference]: Start difference. First operand has 436 places, 594 transitions, 7770 flow. Second operand 10 states and 253 transitions. [2024-06-27 19:37:50,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 635 transitions, 9128 flow [2024-06-27 19:37:54,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 635 transitions, 8781 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:54,670 INFO L231 Difference]: Finished difference. Result has 438 places, 594 transitions, 7771 flow [2024-06-27 19:37:54,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7423, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7771, PETRI_PLACES=438, PETRI_TRANSITIONS=594} [2024-06-27 19:37:54,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-27 19:37:54,671 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 594 transitions, 7771 flow [2024-06-27 19:37:54,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:54,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:54,671 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] [2024-06-27 19:37:54,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 19:37:54,671 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:54,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:54,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1843440719, now seen corresponding path program 19 times [2024-06-27 19:37:54,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:54,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908856433] [2024-06-27 19:37:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:54,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:54,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:54,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908856433] [2024-06-27 19:37:54,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908856433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:54,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:54,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:54,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820235112] [2024-06-27 19:37:54,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:54,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:54,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:54,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:54,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:54,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:54,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 594 transitions, 7771 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:54,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:54,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:54,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:56,375 INFO L124 PetriNetUnfolderBase]: 3616/6136 cut-off events. [2024-06-27 19:37:56,375 INFO L125 PetriNetUnfolderBase]: For 711500/711500 co-relation queries the response was YES. [2024-06-27 19:37:56,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43225 conditions, 6136 events. 3616/6136 cut-off events. For 711500/711500 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42604 event pairs, 654 based on Foata normal form. 1/6135 useless extension candidates. Maximal degree in co-relation 43028. Up to 5418 conditions per place. [2024-06-27 19:37:56,459 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 526 selfloop transitions, 89 changer transitions 0/623 dead transitions. [2024-06-27 19:37:56,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 623 transitions, 9075 flow [2024-06-27 19:37:56,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:37:56,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:37:56,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 19:37:56,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-27 19:37:56,460 INFO L175 Difference]: Start difference. First operand has 438 places, 594 transitions, 7771 flow. Second operand 7 states and 186 transitions. [2024-06-27 19:37:56,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 623 transitions, 9075 flow [2024-06-27 19:38:01,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 623 transitions, 8731 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-27 19:38:01,326 INFO L231 Difference]: Finished difference. Result has 435 places, 594 transitions, 7629 flow [2024-06-27 19:38:01,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7427, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7629, PETRI_PLACES=435, PETRI_TRANSITIONS=594} [2024-06-27 19:38:01,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-27 19:38:01,326 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 594 transitions, 7629 flow [2024-06-27 19:38:01,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:01,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:01,327 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] [2024-06-27 19:38:01,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 19:38:01,327 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:01,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:01,327 INFO L85 PathProgramCache]: Analyzing trace with hash -771694431, now seen corresponding path program 20 times [2024-06-27 19:38:01,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:01,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536676688] [2024-06-27 19:38:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:01,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:01,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:01,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536676688] [2024-06-27 19:38:01,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536676688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:01,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:01,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:01,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196709219] [2024-06-27 19:38:01,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:01,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:01,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:01,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:01,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:01,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:01,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 594 transitions, 7629 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:01,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:01,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:01,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:03,017 INFO L124 PetriNetUnfolderBase]: 3613/6135 cut-off events. [2024-06-27 19:38:03,017 INFO L125 PetriNetUnfolderBase]: For 675693/675699 co-relation queries the response was YES. [2024-06-27 19:38:03,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42629 conditions, 6135 events. 3613/6135 cut-off events. For 675693/675699 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42752 event pairs, 705 based on Foata normal form. 5/6135 useless extension candidates. Maximal degree in co-relation 42432. Up to 5290 conditions per place. [2024-06-27 19:38:03,108 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 438 selfloop transitions, 171 changer transitions 0/617 dead transitions. [2024-06-27 19:38:03,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 617 transitions, 8905 flow [2024-06-27 19:38:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:38:03,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:38:03,109 INFO L175 Difference]: Start difference. First operand has 435 places, 594 transitions, 7629 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:38:03,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 617 transitions, 8905 flow [2024-06-27 19:38:07,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 617 transitions, 8676 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:38:07,626 INFO L231 Difference]: Finished difference. Result has 435 places, 594 transitions, 7756 flow [2024-06-27 19:38:07,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7400, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7756, PETRI_PLACES=435, PETRI_TRANSITIONS=594} [2024-06-27 19:38:07,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-27 19:38:07,627 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 594 transitions, 7756 flow [2024-06-27 19:38:07,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:07,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:07,628 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] [2024-06-27 19:38:07,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 19:38:07,628 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:07,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1843437743, now seen corresponding path program 7 times [2024-06-27 19:38:07,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:07,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462314907] [2024-06-27 19:38:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:07,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:07,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:07,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462314907] [2024-06-27 19:38:07,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462314907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:07,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:07,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:07,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604047815] [2024-06-27 19:38:07,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:07,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:07,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:07,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:07,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:07,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:07,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 594 transitions, 7756 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:07,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:07,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:07,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:09,079 INFO L124 PetriNetUnfolderBase]: 3669/6224 cut-off events. [2024-06-27 19:38:09,079 INFO L125 PetriNetUnfolderBase]: For 772810/772810 co-relation queries the response was YES. [2024-06-27 19:38:09,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43513 conditions, 6224 events. 3669/6224 cut-off events. For 772810/772810 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 43246 event pairs, 536 based on Foata normal form. 16/6238 useless extension candidates. Maximal degree in co-relation 43316. Up to 5338 conditions per place. [2024-06-27 19:38:09,167 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 516 selfloop transitions, 105 changer transitions 0/629 dead transitions. [2024-06-27 19:38:09,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 629 transitions, 9162 flow [2024-06-27 19:38:09,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 19:38:09,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-27 19:38:09,168 INFO L175 Difference]: Start difference. First operand has 435 places, 594 transitions, 7756 flow. Second operand 7 states and 189 transitions. [2024-06-27 19:38:09,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 629 transitions, 9162 flow [2024-06-27 19:38:13,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 629 transitions, 8620 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 19:38:13,172 INFO L231 Difference]: Finished difference. Result has 431 places, 596 transitions, 7518 flow [2024-06-27 19:38:13,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7214, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7518, PETRI_PLACES=431, PETRI_TRANSITIONS=596} [2024-06-27 19:38:13,172 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-27 19:38:13,172 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 596 transitions, 7518 flow [2024-06-27 19:38:13,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:13,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:13,172 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] [2024-06-27 19:38:13,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 19:38:13,173 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:13,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:13,173 INFO L85 PathProgramCache]: Analyzing trace with hash -400799457, now seen corresponding path program 8 times [2024-06-27 19:38:13,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:13,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145921354] [2024-06-27 19:38:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:13,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:13,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:13,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145921354] [2024-06-27 19:38:13,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145921354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:13,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:13,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:13,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156222658] [2024-06-27 19:38:13,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:13,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:13,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:13,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:13,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:13,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:13,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 596 transitions, 7518 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:13,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:13,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:13,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:14,716 INFO L124 PetriNetUnfolderBase]: 3725/6311 cut-off events. [2024-06-27 19:38:14,716 INFO L125 PetriNetUnfolderBase]: For 767956/767962 co-relation queries the response was YES. [2024-06-27 19:38:14,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44174 conditions, 6311 events. 3725/6311 cut-off events. For 767956/767962 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 44070 event pairs, 724 based on Foata normal form. 20/6326 useless extension candidates. Maximal degree in co-relation 43979. Up to 5338 conditions per place. [2024-06-27 19:38:14,806 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 440 selfloop transitions, 171 changer transitions 0/619 dead transitions. [2024-06-27 19:38:14,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 619 transitions, 8876 flow [2024-06-27 19:38:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:14,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:14,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:38:14,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:38:14,807 INFO L175 Difference]: Start difference. First operand has 431 places, 596 transitions, 7518 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:38:14,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 619 transitions, 8876 flow [2024-06-27 19:38:18,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 619 transitions, 8648 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:18,495 INFO L231 Difference]: Finished difference. Result has 433 places, 598 transitions, 7716 flow [2024-06-27 19:38:18,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7290, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7716, PETRI_PLACES=433, PETRI_TRANSITIONS=598} [2024-06-27 19:38:18,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-27 19:38:18,495 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 598 transitions, 7716 flow [2024-06-27 19:38:18,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:18,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:18,495 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] [2024-06-27 19:38:18,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 19:38:18,496 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:18,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:18,496 INFO L85 PathProgramCache]: Analyzing trace with hash -771697407, now seen corresponding path program 9 times [2024-06-27 19:38:18,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:18,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176875780] [2024-06-27 19:38:18,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:18,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:18,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:18,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176875780] [2024-06-27 19:38:18,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176875780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:18,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:18,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:18,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293787928] [2024-06-27 19:38:18,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:18,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:18,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:18,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:18,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:18,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:18,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 598 transitions, 7716 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:18,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:18,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:18,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:20,160 INFO L124 PetriNetUnfolderBase]: 3768/6384 cut-off events. [2024-06-27 19:38:20,160 INFO L125 PetriNetUnfolderBase]: For 768505/768511 co-relation queries the response was YES. [2024-06-27 19:38:20,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44617 conditions, 6384 events. 3768/6384 cut-off events. For 768505/768511 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 44564 event pairs, 733 based on Foata normal form. 20/6399 useless extension candidates. Maximal degree in co-relation 44421. Up to 5343 conditions per place. [2024-06-27 19:38:20,248 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 442 selfloop transitions, 177 changer transitions 0/627 dead transitions. [2024-06-27 19:38:20,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 627 transitions, 9110 flow [2024-06-27 19:38:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:20,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:20,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:38:20,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-27 19:38:20,249 INFO L175 Difference]: Start difference. First operand has 433 places, 598 transitions, 7716 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:38:20,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 627 transitions, 9110 flow [2024-06-27 19:38:23,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 627 transitions, 8720 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:23,962 INFO L231 Difference]: Finished difference. Result has 435 places, 600 transitions, 7772 flow [2024-06-27 19:38:23,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7330, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7772, PETRI_PLACES=435, PETRI_TRANSITIONS=600} [2024-06-27 19:38:23,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-27 19:38:23,963 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 600 transitions, 7772 flow [2024-06-27 19:38:23,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:23,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:23,963 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] [2024-06-27 19:38:23,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 19:38:23,963 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:23,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:23,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1962095465, now seen corresponding path program 10 times [2024-06-27 19:38:23,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:23,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127377653] [2024-06-27 19:38:23,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:23,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:24,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:24,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127377653] [2024-06-27 19:38:24,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127377653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:24,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:24,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:24,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176724019] [2024-06-27 19:38:24,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:24,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:24,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:24,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:24,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:24,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:24,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 600 transitions, 7772 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:24,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:24,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:24,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:25,706 INFO L124 PetriNetUnfolderBase]: 3775/6401 cut-off events. [2024-06-27 19:38:25,706 INFO L125 PetriNetUnfolderBase]: For 700877/700883 co-relation queries the response was YES. [2024-06-27 19:38:25,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43833 conditions, 6401 events. 3775/6401 cut-off events. For 700877/700883 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 44682 event pairs, 602 based on Foata normal form. 16/6412 useless extension candidates. Maximal degree in co-relation 43636. Up to 4818 conditions per place. [2024-06-27 19:38:25,798 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 424 selfloop transitions, 203 changer transitions 0/635 dead transitions. [2024-06-27 19:38:25,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 635 transitions, 9396 flow [2024-06-27 19:38:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:25,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:25,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-27 19:38:25,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2024-06-27 19:38:25,799 INFO L175 Difference]: Start difference. First operand has 435 places, 600 transitions, 7772 flow. Second operand 7 states and 188 transitions. [2024-06-27 19:38:25,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 635 transitions, 9396 flow [2024-06-27 19:38:29,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 635 transitions, 8992 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:29,915 INFO L231 Difference]: Finished difference. Result has 437 places, 601 transitions, 7828 flow [2024-06-27 19:38:29,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7376, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7828, PETRI_PLACES=437, PETRI_TRANSITIONS=601} [2024-06-27 19:38:29,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-27 19:38:29,915 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 601 transitions, 7828 flow [2024-06-27 19:38:29,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:29,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:29,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:29,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 19:38:29,916 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:29,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:29,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1303415619, now seen corresponding path program 2 times [2024-06-27 19:38:29,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:29,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144243388] [2024-06-27 19:38:29,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:29,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:30,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:30,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144243388] [2024-06-27 19:38:30,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144243388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:30,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:30,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:30,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474904206] [2024-06-27 19:38:30,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:30,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:30,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:30,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:30,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:30,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:30,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 601 transitions, 7828 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:30,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:30,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:30,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:31,666 INFO L124 PetriNetUnfolderBase]: 3815/6468 cut-off events. [2024-06-27 19:38:31,667 INFO L125 PetriNetUnfolderBase]: For 686733/686733 co-relation queries the response was YES. [2024-06-27 19:38:31,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44210 conditions, 6468 events. 3815/6468 cut-off events. For 686733/686733 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 45132 event pairs, 544 based on Foata normal form. 12/6478 useless extension candidates. Maximal degree in co-relation 44012. Up to 5512 conditions per place. [2024-06-27 19:38:31,753 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 520 selfloop transitions, 105 changer transitions 0/633 dead transitions. [2024-06-27 19:38:31,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 633 transitions, 9232 flow [2024-06-27 19:38:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:38:31,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-27 19:38:31,754 INFO L175 Difference]: Start difference. First operand has 437 places, 601 transitions, 7828 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:38:31,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 633 transitions, 9232 flow [2024-06-27 19:38:35,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 633 transitions, 8840 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:35,374 INFO L231 Difference]: Finished difference. Result has 439 places, 603 transitions, 7713 flow [2024-06-27 19:38:35,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7436, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7713, PETRI_PLACES=439, PETRI_TRANSITIONS=603} [2024-06-27 19:38:35,375 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-27 19:38:35,375 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 603 transitions, 7713 flow [2024-06-27 19:38:35,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:35,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:35,375 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] [2024-06-27 19:38:35,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 19:38:35,375 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:35,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:35,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1950644561, now seen corresponding path program 3 times [2024-06-27 19:38:35,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:35,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537999131] [2024-06-27 19:38:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:35,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:35,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:35,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537999131] [2024-06-27 19:38:35,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537999131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:35,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:35,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:35,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102715767] [2024-06-27 19:38:35,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:35,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:35,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:35,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:35,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:35,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:35,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 603 transitions, 7713 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:35,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:35,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:35,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:36,907 INFO L124 PetriNetUnfolderBase]: 3855/6543 cut-off events. [2024-06-27 19:38:36,907 INFO L125 PetriNetUnfolderBase]: For 690617/690623 co-relation queries the response was YES. [2024-06-27 19:38:36,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44206 conditions, 6543 events. 3855/6543 cut-off events. For 690617/690623 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 45922 event pairs, 730 based on Foata normal form. 16/6554 useless extension candidates. Maximal degree in co-relation 44008. Up to 5236 conditions per place. [2024-06-27 19:38:36,999 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 436 selfloop transitions, 185 changer transitions 0/629 dead transitions. [2024-06-27 19:38:36,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 629 transitions, 9097 flow [2024-06-27 19:38:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:37,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:38:37,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-27 19:38:37,000 INFO L175 Difference]: Start difference. First operand has 439 places, 603 transitions, 7713 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:38:37,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 629 transitions, 9097 flow [2024-06-27 19:38:41,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 629 transitions, 8842 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:41,405 INFO L231 Difference]: Finished difference. Result has 441 places, 605 transitions, 7902 flow [2024-06-27 19:38:41,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7458, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7902, PETRI_PLACES=441, PETRI_TRANSITIONS=605} [2024-06-27 19:38:41,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 399 predicate places. [2024-06-27 19:38:41,406 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 605 transitions, 7902 flow [2024-06-27 19:38:41,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:41,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:41,406 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] [2024-06-27 19:38:41,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 19:38:41,406 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:41,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash 454554813, now seen corresponding path program 4 times [2024-06-27 19:38:41,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:41,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364811748] [2024-06-27 19:38:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:41,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:41,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:41,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364811748] [2024-06-27 19:38:41,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364811748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:41,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:41,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:41,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328892109] [2024-06-27 19:38:41,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:41,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:41,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:41,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:41,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:41,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:41,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 605 transitions, 7902 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:41,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:41,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:41,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:43,220 INFO L124 PetriNetUnfolderBase]: 3908/6635 cut-off events. [2024-06-27 19:38:43,220 INFO L125 PetriNetUnfolderBase]: For 715779/715779 co-relation queries the response was YES. [2024-06-27 19:38:43,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45368 conditions, 6635 events. 3908/6635 cut-off events. For 715779/715779 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 46657 event pairs, 513 based on Foata normal form. 12/6645 useless extension candidates. Maximal degree in co-relation 45169. Up to 5338 conditions per place. [2024-06-27 19:38:43,309 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 525 selfloop transitions, 103 changer transitions 0/636 dead transitions. [2024-06-27 19:38:43,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 636 transitions, 9550 flow [2024-06-27 19:38:43,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:38:43,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-27 19:38:43,310 INFO L175 Difference]: Start difference. First operand has 441 places, 605 transitions, 7902 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:38:43,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 636 transitions, 9550 flow [2024-06-27 19:38:47,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 636 transitions, 9126 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:47,137 INFO L231 Difference]: Finished difference. Result has 443 places, 607 transitions, 7765 flow [2024-06-27 19:38:47,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7484, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7765, PETRI_PLACES=443, PETRI_TRANSITIONS=607} [2024-06-27 19:38:47,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-27 19:38:47,138 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 607 transitions, 7765 flow [2024-06-27 19:38:47,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:47,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:47,139 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] [2024-06-27 19:38:47,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 19:38:47,139 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:47,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:47,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1329947573, now seen corresponding path program 1 times [2024-06-27 19:38:47,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:47,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064873989] [2024-06-27 19:38:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:47,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:47,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:47,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064873989] [2024-06-27 19:38:47,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064873989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:47,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:47,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:47,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206223428] [2024-06-27 19:38:47,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:47,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:47,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:47,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:47,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:47,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:47,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 607 transitions, 7765 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:47,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:47,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:47,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:48,927 INFO L124 PetriNetUnfolderBase]: 3942/6674 cut-off events. [2024-06-27 19:38:48,928 INFO L125 PetriNetUnfolderBase]: For 677698/677704 co-relation queries the response was YES. [2024-06-27 19:38:48,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45826 conditions, 6674 events. 3942/6674 cut-off events. For 677698/677704 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 47008 event pairs, 738 based on Foata normal form. 6/6671 useless extension candidates. Maximal degree in co-relation 45626. Up to 5916 conditions per place. [2024-06-27 19:38:49,021 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 550 selfloop transitions, 78 changer transitions 0/636 dead transitions. [2024-06-27 19:38:49,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 636 transitions, 9479 flow [2024-06-27 19:38:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:38:49,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-27 19:38:49,022 INFO L175 Difference]: Start difference. First operand has 443 places, 607 transitions, 7765 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:38:49,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 636 transitions, 9479 flow [2024-06-27 19:38:53,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 636 transitions, 9342 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 19:38:53,961 INFO L231 Difference]: Finished difference. Result has 448 places, 613 transitions, 7982 flow [2024-06-27 19:38:53,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7628, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7982, PETRI_PLACES=448, PETRI_TRANSITIONS=613} [2024-06-27 19:38:53,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-27 19:38:53,962 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 613 transitions, 7982 flow [2024-06-27 19:38:53,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:53,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:53,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:53,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 19:38:53,962 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:53,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:53,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1887467269, now seen corresponding path program 2 times [2024-06-27 19:38:53,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:53,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110820495] [2024-06-27 19:38:53,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:53,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:54,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:54,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110820495] [2024-06-27 19:38:54,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110820495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:54,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:54,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:54,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009882610] [2024-06-27 19:38:54,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:54,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:54,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:54,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:54,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:54,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:54,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 613 transitions, 7982 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:54,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:54,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:54,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:55,497 INFO L124 PetriNetUnfolderBase]: 3950/6689 cut-off events. [2024-06-27 19:38:55,497 INFO L125 PetriNetUnfolderBase]: For 687297/687303 co-relation queries the response was YES. [2024-06-27 19:38:55,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46123 conditions, 6689 events. 3950/6689 cut-off events. For 687297/687303 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 47109 event pairs, 745 based on Foata normal form. 6/6688 useless extension candidates. Maximal degree in co-relation 45920. Up to 5970 conditions per place. [2024-06-27 19:38:55,594 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 552 selfloop transitions, 73 changer transitions 0/633 dead transitions. [2024-06-27 19:38:55,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 633 transitions, 9344 flow [2024-06-27 19:38:55,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:38:55,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-27 19:38:55,595 INFO L175 Difference]: Start difference. First operand has 448 places, 613 transitions, 7982 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:38:55,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 633 transitions, 9344 flow [2024-06-27 19:38:59,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 633 transitions, 9126 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-27 19:38:59,535 INFO L231 Difference]: Finished difference. Result has 452 places, 615 transitions, 7987 flow [2024-06-27 19:38:59,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7792, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7987, PETRI_PLACES=452, PETRI_TRANSITIONS=615} [2024-06-27 19:38:59,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-27 19:38:59,535 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 615 transitions, 7987 flow [2024-06-27 19:38:59,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:59,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:59,536 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] [2024-06-27 19:38:59,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-27 19:38:59,536 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:59,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:59,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1848496379, now seen corresponding path program 3 times [2024-06-27 19:38:59,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:59,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573223245] [2024-06-27 19:38:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:59,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:59,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:59,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573223245] [2024-06-27 19:38:59,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573223245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:59,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:59,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:59,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694047042] [2024-06-27 19:38:59,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:59,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:59,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:59,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:59,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:59,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:59,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 615 transitions, 7987 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:59,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:59,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:59,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand