./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe010_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe010_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/safe010_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe010_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:50:28,023 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:50:28,088 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:50:28,091 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:50:28,091 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:50:28,124 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:50:28,126 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:50:28,126 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:50:28,127 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:50:28,127 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:50:28,128 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:50:28,128 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:50:28,129 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:50:28,130 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:50:28,130 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:50:28,131 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:50:28,131 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:50:28,134 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:50:28,134 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:50:28,134 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:50:28,134 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:50:28,135 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:50:28,135 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:50:28,135 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:50:28,135 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:50:28,136 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:50:28,136 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:50:28,136 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:50:28,136 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:50:28,137 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:50:28,137 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:50:28,138 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:50:28,138 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:50:28,138 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:50:28,138 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:50:28,138 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:50:28,138 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:50:28,139 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:50:28,139 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:50:28,139 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:50:28,139 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:50:28,139 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:50:28,139 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:50:28,140 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:50:28,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:50:28,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:50:28,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:50:28,319 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:50:28,320 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:50:28,321 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe010_tso.yml/witness.yml [2024-06-27 17:50:28,438 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:50:28,440 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:50:28,441 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe010_tso.i [2024-06-27 17:50:29,550 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:50:29,774 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:50:29,781 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe010_tso.i [2024-06-27 17:50:29,792 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00d7176c0/37da094078da44a199dfa85cb40a1302/FLAGd10256dbe [2024-06-27 17:50:29,811 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00d7176c0/37da094078da44a199dfa85cb40a1302 [2024-06-27 17:50:29,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:50:29,812 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:50:29,814 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:50:29,815 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:50:29,818 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:50:29,819 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:50:28" (1/2) ... [2024-06-27 17:50:29,820 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@626fe753 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:29, skipping insertion in model container [2024-06-27 17:50:29,820 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:50:28" (1/2) ... [2024-06-27 17:50:29,821 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@47df6f70 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:29, skipping insertion in model container [2024-06-27 17:50:29,821 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:50:29" (2/2) ... [2024-06-27 17:50:29,822 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@626fe753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:29, skipping insertion in model container [2024-06-27 17:50:29,822 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:50:29" (2/2) ... [2024-06-27 17:50:29,823 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:50:29,848 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:50:29,851 INFO L97 edCorrectnessWitness]: Location invariant before [L761-L761] (((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 17:50:29,852 INFO L97 edCorrectnessWitness]: Location invariant before [L762-L762] (((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 17:50:29,852 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:50:29,852 INFO L106 edCorrectnessWitness]: ghost_update [L759-L759] multithreaded = 1; [2024-06-27 17:50:29,888 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:50:30,014 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe010_tso.i[945,958] [2024-06-27 17:50:30,140 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:50:30,146 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:50:30,186 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe010_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:50:30,223 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:50:30,252 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:50:30,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:30 WrapperNode [2024-06-27 17:50:30,253 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:50:30,254 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:50:30,254 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:50:30,254 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:50:30,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:30" (1/1) ... [2024-06-27 17:50:30,270 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:30" (1/1) ... [2024-06-27 17:50:30,287 INFO L138 Inliner]: procedures = 174, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2024-06-27 17:50:30,288 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:50:30,288 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:50:30,289 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:50:30,289 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:50:30,303 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:30" (1/1) ... [2024-06-27 17:50:30,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:30" (1/1) ... [2024-06-27 17:50:30,315 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:30" (1/1) ... [2024-06-27 17:50:30,333 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 17:50:30,334 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:30" (1/1) ... [2024-06-27 17:50:30,334 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:30" (1/1) ... [2024-06-27 17:50:30,342 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:30" (1/1) ... [2024-06-27 17:50:30,345 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:30" (1/1) ... [2024-06-27 17:50:30,347 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:30" (1/1) ... [2024-06-27 17:50:30,355 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:30" (1/1) ... [2024-06-27 17:50:30,357 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:50:30,357 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:50:30,357 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:50:30,358 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:50:30,358 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:30" (1/1) ... [2024-06-27 17:50:30,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:50:30,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:50:30,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:50:30,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:50:30,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:50:30,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:50:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:50:30,479 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:50:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:50:30,479 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:50:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:50:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:50:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:50:30,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:50:30,481 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:50:30,596 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:50:30,597 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:50:30,738 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:50:30,738 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:50:30,797 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:50:30,798 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:50:30,798 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:50:30 BoogieIcfgContainer [2024-06-27 17:50:30,798 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:50:30,800 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:50:30,800 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:50:30,802 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:50:30,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:50:28" (1/4) ... [2024-06-27 17:50:30,803 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664a29a1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:50:30, skipping insertion in model container [2024-06-27 17:50:30,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:50:29" (2/4) ... [2024-06-27 17:50:30,803 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664a29a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:50:30, skipping insertion in model container [2024-06-27 17:50:30,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:30" (3/4) ... [2024-06-27 17:50:30,804 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664a29a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:50:30, skipping insertion in model container [2024-06-27 17:50:30,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:50:30" (4/4) ... [2024-06-27 17:50:30,805 INFO L112 eAbstractionObserver]: Analyzing ICFG safe010_tso.i [2024-06-27 17:50:30,817 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:50:30,818 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 17:50:30,819 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:50:30,844 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:50:30,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 34 transitions, 76 flow [2024-06-27 17:50:30,891 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2024-06-27 17:50:30,891 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:50:30,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 32 events. 1/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 44 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-06-27 17:50:30,894 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 34 transitions, 76 flow [2024-06-27 17:50:30,896 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 29 transitions, 64 flow [2024-06-27 17:50:30,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:50:30,908 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;@e0aa36, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:50:30,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 17:50:30,911 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:50:30,911 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:50:30,911 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:50:30,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:30,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:50:30,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:30,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:30,916 INFO L85 PathProgramCache]: Analyzing trace with hash 177157215, now seen corresponding path program 1 times [2024-06-27 17:50:30,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:30,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232911015] [2024-06-27 17:50:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:30,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:31,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:31,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232911015] [2024-06-27 17:50:31,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232911015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:31,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:31,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:50:31,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122724403] [2024-06-27 17:50:31,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:31,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:50:31,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:31,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:50:31,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:50:31,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 34 [2024-06-27 17:50:31,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:31,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 34 [2024-06-27 17:50:31,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:31,384 INFO L124 PetriNetUnfolderBase]: 149/308 cut-off events. [2024-06-27 17:50:31,384 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-27 17:50:31,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 308 events. 149/308 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1427 event pairs, 82 based on Foata normal form. 1/294 useless extension candidates. Maximal degree in co-relation 581. Up to 261 conditions per place. [2024-06-27 17:50:31,388 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 22 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-06-27 17:50:31,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 133 flow [2024-06-27 17:50:31,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:50:31,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:50:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-27 17:50:31,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7058823529411765 [2024-06-27 17:50:31,414 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 64 flow. Second operand 3 states and 72 transitions. [2024-06-27 17:50:31,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 133 flow [2024-06-27 17:50:31,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 130 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:31,417 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 83 flow [2024-06-27 17:50:31,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-06-27 17:50:31,421 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2024-06-27 17:50:31,422 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 83 flow [2024-06-27 17:50:31,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:31,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:31,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:50:31,422 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:31,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:31,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1550596418, now seen corresponding path program 1 times [2024-06-27 17:50:31,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:31,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945260654] [2024-06-27 17:50:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:31,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:31,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:31,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945260654] [2024-06-27 17:50:31,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945260654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:31,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:31,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:50:31,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748069832] [2024-06-27 17:50:31,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:31,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:50:31,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:31,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:50:31,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:50:31,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 34 [2024-06-27 17:50:31,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 83 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:31,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 34 [2024-06-27 17:50:31,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:31,609 INFO L124 PetriNetUnfolderBase]: 154/319 cut-off events. [2024-06-27 17:50:31,610 INFO L125 PetriNetUnfolderBase]: For 52/55 co-relation queries the response was YES. [2024-06-27 17:50:31,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689 conditions, 319 events. 154/319 cut-off events. For 52/55 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1487 event pairs, 51 based on Foata normal form. 5/320 useless extension candidates. Maximal degree in co-relation 677. Up to 232 conditions per place. [2024-06-27 17:50:31,615 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 30 selfloop transitions, 8 changer transitions 0/50 dead transitions. [2024-06-27 17:50:31,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 207 flow [2024-06-27 17:50:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:50:31,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:50:31,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-27 17:50:31,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7279411764705882 [2024-06-27 17:50:31,619 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 83 flow. Second operand 4 states and 99 transitions. [2024-06-27 17:50:31,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 207 flow [2024-06-27 17:50:31,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:50:31,623 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 135 flow [2024-06-27 17:50:31,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2024-06-27 17:50:31,625 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2024-06-27 17:50:31,625 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 135 flow [2024-06-27 17:50:31,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:31,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:31,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:50:31,626 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:31,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:31,631 INFO L85 PathProgramCache]: Analyzing trace with hash -823848272, now seen corresponding path program 1 times [2024-06-27 17:50:31,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:31,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285730422] [2024-06-27 17:50:31,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:31,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:31,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:31,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285730422] [2024-06-27 17:50:31,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285730422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:31,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:31,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:50:31,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842006540] [2024-06-27 17:50:31,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:31,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:50:31,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:31,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:50:31,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:50:31,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:31,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:31,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:31,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:31,873 INFO L124 PetriNetUnfolderBase]: 187/380 cut-off events. [2024-06-27 17:50:31,873 INFO L125 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2024-06-27 17:50:31,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 380 events. 187/380 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1803 event pairs, 48 based on Foata normal form. 2/379 useless extension candidates. Maximal degree in co-relation 970. Up to 297 conditions per place. [2024-06-27 17:50:31,876 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 43 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2024-06-27 17:50:31,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 298 flow [2024-06-27 17:50:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:31,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-27 17:50:31,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6705882352941176 [2024-06-27 17:50:31,882 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 135 flow. Second operand 5 states and 114 transitions. [2024-06-27 17:50:31,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 298 flow [2024-06-27 17:50:31,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 296 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 17:50:31,885 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 189 flow [2024-06-27 17:50:31,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=189, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-06-27 17:50:31,887 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2024-06-27 17:50:31,887 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 189 flow [2024-06-27 17:50:31,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:31,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:31,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:50:31,888 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:31,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:31,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1444192145, now seen corresponding path program 1 times [2024-06-27 17:50:31,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:31,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460508099] [2024-06-27 17:50:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:31,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:31,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:31,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460508099] [2024-06-27 17:50:31,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460508099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:31,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:31,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:31,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693162878] [2024-06-27 17:50:31,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:31,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:31,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:31,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:31,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:31,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:31,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 189 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:31,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:31,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:32,078 INFO L124 PetriNetUnfolderBase]: 183/381 cut-off events. [2024-06-27 17:50:32,078 INFO L125 PetriNetUnfolderBase]: For 378/378 co-relation queries the response was YES. [2024-06-27 17:50:32,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 381 events. 183/381 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1795 event pairs, 45 based on Foata normal form. 4/378 useless extension candidates. Maximal degree in co-relation 1076. Up to 263 conditions per place. [2024-06-27 17:50:32,080 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 45 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2024-06-27 17:50:32,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 337 flow [2024-06-27 17:50:32,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:32,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-27 17:50:32,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421568627450981 [2024-06-27 17:50:32,082 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 189 flow. Second operand 6 states and 131 transitions. [2024-06-27 17:50:32,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 337 flow [2024-06-27 17:50:32,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:50:32,084 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 201 flow [2024-06-27 17:50:32,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=201, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2024-06-27 17:50:32,085 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2024-06-27 17:50:32,085 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 201 flow [2024-06-27 17:50:32,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:32,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:32,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:50:32,086 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:32,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:32,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1840912348, now seen corresponding path program 1 times [2024-06-27 17:50:32,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:32,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285822379] [2024-06-27 17:50:32,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:32,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:32,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:32,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285822379] [2024-06-27 17:50:32,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285822379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:32,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:32,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:50:32,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390813809] [2024-06-27 17:50:32,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:32,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:50:32,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:32,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:50:32,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:50:32,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:32,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 201 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:32,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:32,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:32,217 INFO L124 PetriNetUnfolderBase]: 178/369 cut-off events. [2024-06-27 17:50:32,217 INFO L125 PetriNetUnfolderBase]: For 569/572 co-relation queries the response was YES. [2024-06-27 17:50:32,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 369 events. 178/369 cut-off events. For 569/572 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1769 event pairs, 46 based on Foata normal form. 4/370 useless extension candidates. Maximal degree in co-relation 1101. Up to 255 conditions per place. [2024-06-27 17:50:32,220 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 31 selfloop transitions, 9 changer transitions 0/51 dead transitions. [2024-06-27 17:50:32,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 51 transitions, 301 flow [2024-06-27 17:50:32,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:50:32,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:50:32,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-27 17:50:32,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6691176470588235 [2024-06-27 17:50:32,221 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 201 flow. Second operand 4 states and 91 transitions. [2024-06-27 17:50:32,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 51 transitions, 301 flow [2024-06-27 17:50:32,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 280 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:32,224 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 205 flow [2024-06-27 17:50:32,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-06-27 17:50:32,224 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2024-06-27 17:50:32,224 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 205 flow [2024-06-27 17:50:32,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:32,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:32,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:50:32,225 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:32,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:32,226 INFO L85 PathProgramCache]: Analyzing trace with hash 366925761, now seen corresponding path program 1 times [2024-06-27 17:50:32,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:32,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812293631] [2024-06-27 17:50:32,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:32,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:32,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:32,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812293631] [2024-06-27 17:50:32,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812293631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:32,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:32,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:32,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969256016] [2024-06-27 17:50:32,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:32,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:32,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:32,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:32,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:32,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:32,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 205 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:32,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:32,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:32,406 INFO L124 PetriNetUnfolderBase]: 194/403 cut-off events. [2024-06-27 17:50:32,406 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2024-06-27 17:50:32,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 403 events. 194/403 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1974 event pairs, 39 based on Foata normal form. 1/397 useless extension candidates. Maximal degree in co-relation 1201. Up to 227 conditions per place. [2024-06-27 17:50:32,409 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 43 selfloop transitions, 18 changer transitions 0/72 dead transitions. [2024-06-27 17:50:32,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 72 transitions, 431 flow [2024-06-27 17:50:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 17:50:32,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6911764705882353 [2024-06-27 17:50:32,410 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 205 flow. Second operand 6 states and 141 transitions. [2024-06-27 17:50:32,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 72 transitions, 431 flow [2024-06-27 17:50:32,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 72 transitions, 409 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:32,413 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 262 flow [2024-06-27 17:50:32,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-27 17:50:32,413 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2024-06-27 17:50:32,413 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 262 flow [2024-06-27 17:50:32,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:32,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:32,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:50:32,414 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:32,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:32,415 INFO L85 PathProgramCache]: Analyzing trace with hash -587112733, now seen corresponding path program 2 times [2024-06-27 17:50:32,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:32,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281429051] [2024-06-27 17:50:32,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:32,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:32,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:32,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281429051] [2024-06-27 17:50:32,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281429051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:32,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:32,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:32,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652880068] [2024-06-27 17:50:32,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:32,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:32,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:32,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:32,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:32,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:32,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:32,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:32,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:32,586 INFO L124 PetriNetUnfolderBase]: 208/420 cut-off events. [2024-06-27 17:50:32,586 INFO L125 PetriNetUnfolderBase]: For 755/755 co-relation queries the response was YES. [2024-06-27 17:50:32,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1418 conditions, 420 events. 208/420 cut-off events. For 755/755 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2075 event pairs, 39 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1395. Up to 288 conditions per place. [2024-06-27 17:50:32,589 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 45 selfloop transitions, 15 changer transitions 0/71 dead transitions. [2024-06-27 17:50:32,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 71 transitions, 454 flow [2024-06-27 17:50:32,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:32,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-27 17:50:32,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6519607843137255 [2024-06-27 17:50:32,590 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 262 flow. Second operand 6 states and 133 transitions. [2024-06-27 17:50:32,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 71 transitions, 454 flow [2024-06-27 17:50:32,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 437 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 17:50:32,593 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 316 flow [2024-06-27 17:50:32,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2024-06-27 17:50:32,594 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2024-06-27 17:50:32,594 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 316 flow [2024-06-27 17:50:32,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:32,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:32,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:50:32,595 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:32,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:32,596 INFO L85 PathProgramCache]: Analyzing trace with hash -992988735, now seen corresponding path program 3 times [2024-06-27 17:50:32,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:32,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94057494] [2024-06-27 17:50:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:32,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:32,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:32,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94057494] [2024-06-27 17:50:32,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94057494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:32,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:32,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:32,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630875381] [2024-06-27 17:50:32,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:32,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:32,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:32,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:32,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:32,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:32,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 316 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:32,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:32,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:32,766 INFO L124 PetriNetUnfolderBase]: 213/443 cut-off events. [2024-06-27 17:50:32,767 INFO L125 PetriNetUnfolderBase]: For 1083/1083 co-relation queries the response was YES. [2024-06-27 17:50:32,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1532 conditions, 443 events. 213/443 cut-off events. For 1083/1083 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2250 event pairs, 39 based on Foata normal form. 2/439 useless extension candidates. Maximal degree in co-relation 1506. Up to 253 conditions per place. [2024-06-27 17:50:32,769 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 45 selfloop transitions, 21 changer transitions 0/77 dead transitions. [2024-06-27 17:50:32,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 524 flow [2024-06-27 17:50:32,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 17:50:32,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6813725490196079 [2024-06-27 17:50:32,771 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 316 flow. Second operand 6 states and 139 transitions. [2024-06-27 17:50:32,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 524 flow [2024-06-27 17:50:32,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 487 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:32,774 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 354 flow [2024-06-27 17:50:32,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2024-06-27 17:50:32,775 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 28 predicate places. [2024-06-27 17:50:32,775 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 354 flow [2024-06-27 17:50:32,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:32,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:32,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:50:32,775 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:32,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:32,776 INFO L85 PathProgramCache]: Analyzing trace with hash -992742471, now seen corresponding path program 1 times [2024-06-27 17:50:32,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:32,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526468674] [2024-06-27 17:50:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:32,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:32,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:32,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526468674] [2024-06-27 17:50:32,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526468674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:32,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:32,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:32,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389801097] [2024-06-27 17:50:32,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:32,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:32,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:32,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:32,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:32,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:32,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 354 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:32,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:32,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:32,933 INFO L124 PetriNetUnfolderBase]: 220/455 cut-off events. [2024-06-27 17:50:32,935 INFO L125 PetriNetUnfolderBase]: For 1429/1432 co-relation queries the response was YES. [2024-06-27 17:50:32,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 455 events. 220/455 cut-off events. For 1429/1432 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2333 event pairs, 47 based on Foata normal form. 6/455 useless extension candidates. Maximal degree in co-relation 1607. Up to 288 conditions per place. [2024-06-27 17:50:32,937 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 45 selfloop transitions, 13 changer transitions 0/69 dead transitions. [2024-06-27 17:50:32,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 69 transitions, 502 flow [2024-06-27 17:50:32,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:32,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-27 17:50:32,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 17:50:32,939 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 354 flow. Second operand 5 states and 110 transitions. [2024-06-27 17:50:32,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 69 transitions, 502 flow [2024-06-27 17:50:32,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 69 transitions, 461 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:32,942 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 350 flow [2024-06-27 17:50:32,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-06-27 17:50:32,943 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2024-06-27 17:50:32,943 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 350 flow [2024-06-27 17:50:32,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:32,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:32,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:50:32,944 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:32,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:32,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1510202561, now seen corresponding path program 1 times [2024-06-27 17:50:32,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:32,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740795546] [2024-06-27 17:50:32,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:32,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:32,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:32,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740795546] [2024-06-27 17:50:32,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740795546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:32,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:32,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:32,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491742370] [2024-06-27 17:50:32,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:32,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:32,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:32,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:32,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:33,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:33,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 350 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:33,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:33,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:33,074 INFO L124 PetriNetUnfolderBase]: 218/450 cut-off events. [2024-06-27 17:50:33,074 INFO L125 PetriNetUnfolderBase]: For 1219/1222 co-relation queries the response was YES. [2024-06-27 17:50:33,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611 conditions, 450 events. 218/450 cut-off events. For 1219/1222 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2298 event pairs, 52 based on Foata normal form. 3/443 useless extension candidates. Maximal degree in co-relation 1582. Up to 249 conditions per place. [2024-06-27 17:50:33,077 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 46 selfloop transitions, 18 changer transitions 0/75 dead transitions. [2024-06-27 17:50:33,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 75 transitions, 536 flow [2024-06-27 17:50:33,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:33,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-27 17:50:33,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-27 17:50:33,078 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 350 flow. Second operand 6 states and 134 transitions. [2024-06-27 17:50:33,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 75 transitions, 536 flow [2024-06-27 17:50:33,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 75 transitions, 499 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:33,082 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 354 flow [2024-06-27 17:50:33,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2024-06-27 17:50:33,082 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 31 predicate places. [2024-06-27 17:50:33,082 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 354 flow [2024-06-27 17:50:33,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:33,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:33,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:50:33,083 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:33,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:33,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1248195521, now seen corresponding path program 2 times [2024-06-27 17:50:33,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:33,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565016446] [2024-06-27 17:50:33,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:33,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:33,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:33,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565016446] [2024-06-27 17:50:33,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565016446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:33,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:33,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:33,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453355347] [2024-06-27 17:50:33,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:33,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:33,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:33,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:33,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:33,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:33,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 354 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:33,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:33,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:33,235 INFO L124 PetriNetUnfolderBase]: 225/465 cut-off events. [2024-06-27 17:50:33,235 INFO L125 PetriNetUnfolderBase]: For 1434/1437 co-relation queries the response was YES. [2024-06-27 17:50:33,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1664 conditions, 465 events. 225/465 cut-off events. For 1434/1437 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2405 event pairs, 52 based on Foata normal form. 3/458 useless extension candidates. Maximal degree in co-relation 1635. Up to 271 conditions per place. [2024-06-27 17:50:33,237 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 45 selfloop transitions, 18 changer transitions 0/74 dead transitions. [2024-06-27 17:50:33,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 74 transitions, 552 flow [2024-06-27 17:50:33,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-27 17:50:33,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2024-06-27 17:50:33,239 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 354 flow. Second operand 5 states and 115 transitions. [2024-06-27 17:50:33,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 74 transitions, 552 flow [2024-06-27 17:50:33,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 484 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:33,242 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 346 flow [2024-06-27 17:50:33,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2024-06-27 17:50:33,243 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 30 predicate places. [2024-06-27 17:50:33,243 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 346 flow [2024-06-27 17:50:33,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:33,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:33,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:50:33,244 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:33,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1248189941, now seen corresponding path program 3 times [2024-06-27 17:50:33,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:33,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401114785] [2024-06-27 17:50:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:33,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:33,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:33,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401114785] [2024-06-27 17:50:33,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401114785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:33,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:33,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:33,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426514257] [2024-06-27 17:50:33,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:33,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:33,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:33,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:33,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:33,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:33,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:33,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:33,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:33,394 INFO L124 PetriNetUnfolderBase]: 223/462 cut-off events. [2024-06-27 17:50:33,394 INFO L125 PetriNetUnfolderBase]: For 1321/1324 co-relation queries the response was YES. [2024-06-27 17:50:33,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1605 conditions, 462 events. 223/462 cut-off events. For 1321/1324 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2393 event pairs, 46 based on Foata normal form. 3/460 useless extension candidates. Maximal degree in co-relation 1577. Up to 269 conditions per place. [2024-06-27 17:50:33,397 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 46 selfloop transitions, 22 changer transitions 0/79 dead transitions. [2024-06-27 17:50:33,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 79 transitions, 528 flow [2024-06-27 17:50:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:33,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:33,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-27 17:50:33,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 17:50:33,398 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 346 flow. Second operand 7 states and 153 transitions. [2024-06-27 17:50:33,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 79 transitions, 528 flow [2024-06-27 17:50:33,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 79 transitions, 505 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:33,402 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 372 flow [2024-06-27 17:50:33,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=372, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2024-06-27 17:50:33,402 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2024-06-27 17:50:33,403 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 372 flow [2024-06-27 17:50:33,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:33,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:33,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:50:33,403 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:33,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:33,404 INFO L85 PathProgramCache]: Analyzing trace with hash 425499712, now seen corresponding path program 1 times [2024-06-27 17:50:33,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:33,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881234043] [2024-06-27 17:50:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:33,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:33,495 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 17:50:33,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:33,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881234043] [2024-06-27 17:50:33,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881234043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:33,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:33,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:33,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784901295] [2024-06-27 17:50:33,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:33,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:33,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:33,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:33,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:33,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:33,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 372 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:33,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:33,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:33,635 INFO L124 PetriNetUnfolderBase]: 275/568 cut-off events. [2024-06-27 17:50:33,636 INFO L125 PetriNetUnfolderBase]: For 2195/2195 co-relation queries the response was YES. [2024-06-27 17:50:33,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2023 conditions, 568 events. 275/568 cut-off events. For 2195/2195 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3097 event pairs, 36 based on Foata normal form. 2/561 useless extension candidates. Maximal degree in co-relation 1994. Up to 196 conditions per place. [2024-06-27 17:50:33,639 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 50 selfloop transitions, 28 changer transitions 0/89 dead transitions. [2024-06-27 17:50:33,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 632 flow [2024-06-27 17:50:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:33,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 17:50:33,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2024-06-27 17:50:33,640 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 372 flow. Second operand 7 states and 161 transitions. [2024-06-27 17:50:33,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 632 flow [2024-06-27 17:50:33,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 571 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:33,645 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 379 flow [2024-06-27 17:50:33,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=379, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2024-06-27 17:50:33,645 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2024-06-27 17:50:33,645 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 379 flow [2024-06-27 17:50:33,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:33,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:33,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:50:33,646 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:33,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:33,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1664562504, now seen corresponding path program 2 times [2024-06-27 17:50:33,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:33,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3778959] [2024-06-27 17:50:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:33,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:33,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:33,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3778959] [2024-06-27 17:50:33,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3778959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:33,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:33,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:33,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703341297] [2024-06-27 17:50:33,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:33,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:33,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:33,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:33,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:33,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:33,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 379 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:33,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:33,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:33,819 INFO L124 PetriNetUnfolderBase]: 285/576 cut-off events. [2024-06-27 17:50:33,819 INFO L125 PetriNetUnfolderBase]: For 2375/2375 co-relation queries the response was YES. [2024-06-27 17:50:33,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2120 conditions, 576 events. 285/576 cut-off events. For 2375/2375 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3120 event pairs, 60 based on Foata normal form. 2/569 useless extension candidates. Maximal degree in co-relation 2090. Up to 359 conditions per place. [2024-06-27 17:50:33,822 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 47 selfloop transitions, 27 changer transitions 0/85 dead transitions. [2024-06-27 17:50:33,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 85 transitions, 593 flow [2024-06-27 17:50:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:33,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-27 17:50:33,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6638655462184874 [2024-06-27 17:50:33,824 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 379 flow. Second operand 7 states and 158 transitions. [2024-06-27 17:50:33,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 85 transitions, 593 flow [2024-06-27 17:50:33,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 85 transitions, 539 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:33,830 INFO L231 Difference]: Finished difference. Result has 74 places, 60 transitions, 395 flow [2024-06-27 17:50:33,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=395, PETRI_PLACES=74, PETRI_TRANSITIONS=60} [2024-06-27 17:50:33,830 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2024-06-27 17:50:33,830 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 60 transitions, 395 flow [2024-06-27 17:50:33,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:33,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:33,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:50:33,831 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:33,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:33,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2004276530, now seen corresponding path program 3 times [2024-06-27 17:50:33,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:33,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849593563] [2024-06-27 17:50:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:33,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:33,901 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 17:50:33,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:33,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849593563] [2024-06-27 17:50:33,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849593563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:33,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:33,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:33,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211848903] [2024-06-27 17:50:33,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:33,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:33,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:33,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:33,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:33,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:33,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 60 transitions, 395 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:33,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:33,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:34,019 INFO L124 PetriNetUnfolderBase]: 295/588 cut-off events. [2024-06-27 17:50:34,020 INFO L125 PetriNetUnfolderBase]: For 2772/2772 co-relation queries the response was YES. [2024-06-27 17:50:34,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2210 conditions, 588 events. 295/588 cut-off events. For 2772/2772 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3256 event pairs, 51 based on Foata normal form. 2/584 useless extension candidates. Maximal degree in co-relation 2179. Up to 436 conditions per place. [2024-06-27 17:50:34,023 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 56 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2024-06-27 17:50:34,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 83 transitions, 598 flow [2024-06-27 17:50:34,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:34,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:34,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-27 17:50:34,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6386554621848739 [2024-06-27 17:50:34,024 INFO L175 Difference]: Start difference. First operand has 74 places, 60 transitions, 395 flow. Second operand 7 states and 152 transitions. [2024-06-27 17:50:34,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 83 transitions, 598 flow [2024-06-27 17:50:34,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 83 transitions, 540 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:34,030 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 386 flow [2024-06-27 17:50:34,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=386, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2024-06-27 17:50:34,031 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 40 predicate places. [2024-06-27 17:50:34,031 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 386 flow [2024-06-27 17:50:34,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:34,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:34,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:50:34,032 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:34,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:34,032 INFO L85 PathProgramCache]: Analyzing trace with hash -779416000, now seen corresponding path program 4 times [2024-06-27 17:50:34,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:34,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067758811] [2024-06-27 17:50:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:34,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:34,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:34,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067758811] [2024-06-27 17:50:34,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067758811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:34,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:34,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:34,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425306264] [2024-06-27 17:50:34,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:34,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:34,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:34,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:34,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:34,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:34,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 386 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:34,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:34,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:34,254 INFO L124 PetriNetUnfolderBase]: 282/565 cut-off events. [2024-06-27 17:50:34,255 INFO L125 PetriNetUnfolderBase]: For 2785/2785 co-relation queries the response was YES. [2024-06-27 17:50:34,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1974 conditions, 565 events. 282/565 cut-off events. For 2785/2785 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3077 event pairs, 23 based on Foata normal form. 10/570 useless extension candidates. Maximal degree in co-relation 1942. Up to 256 conditions per place. [2024-06-27 17:50:34,257 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 52 selfloop transitions, 26 changer transitions 0/89 dead transitions. [2024-06-27 17:50:34,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 89 transitions, 612 flow [2024-06-27 17:50:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:34,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:34,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 17:50:34,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6722689075630253 [2024-06-27 17:50:34,259 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 386 flow. Second operand 7 states and 160 transitions. [2024-06-27 17:50:34,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 89 transitions, 612 flow [2024-06-27 17:50:34,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 570 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:34,265 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 405 flow [2024-06-27 17:50:34,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=405, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2024-06-27 17:50:34,265 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2024-06-27 17:50:34,265 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 405 flow [2024-06-27 17:50:34,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:34,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:34,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:50:34,266 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:34,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:34,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1282992474, now seen corresponding path program 1 times [2024-06-27 17:50:34,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:34,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217958720] [2024-06-27 17:50:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:34,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:34,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:34,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217958720] [2024-06-27 17:50:34,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217958720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:34,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:34,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:34,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286686533] [2024-06-27 17:50:34,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:34,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:34,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:34,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:34,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:34,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:34,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 405 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:34,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:34,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:34,416 INFO L124 PetriNetUnfolderBase]: 292/583 cut-off events. [2024-06-27 17:50:34,416 INFO L125 PetriNetUnfolderBase]: For 2257/2257 co-relation queries the response was YES. [2024-06-27 17:50:34,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2072 conditions, 583 events. 292/583 cut-off events. For 2257/2257 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3233 event pairs, 46 based on Foata normal form. 2/579 useless extension candidates. Maximal degree in co-relation 2039. Up to 438 conditions per place. [2024-06-27 17:50:34,419 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 54 selfloop transitions, 13 changer transitions 0/78 dead transitions. [2024-06-27 17:50:34,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 581 flow [2024-06-27 17:50:34,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:34,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:34,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-27 17:50:34,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6705882352941176 [2024-06-27 17:50:34,420 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 405 flow. Second operand 5 states and 114 transitions. [2024-06-27 17:50:34,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 581 flow [2024-06-27 17:50:34,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 519 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:34,429 INFO L231 Difference]: Finished difference. Result has 76 places, 62 transitions, 381 flow [2024-06-27 17:50:34,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=381, PETRI_PLACES=76, PETRI_TRANSITIONS=62} [2024-06-27 17:50:34,430 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 40 predicate places. [2024-06-27 17:50:34,430 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 62 transitions, 381 flow [2024-06-27 17:50:34,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:34,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:34,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:50:34,431 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:34,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:34,431 INFO L85 PathProgramCache]: Analyzing trace with hash -542759272, now seen corresponding path program 2 times [2024-06-27 17:50:34,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:34,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284173843] [2024-06-27 17:50:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:34,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:34,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:34,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284173843] [2024-06-27 17:50:34,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284173843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:34,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:34,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:34,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589058941] [2024-06-27 17:50:34,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:34,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:34,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:34,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:34,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:34,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:34,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 62 transitions, 381 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:34,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:34,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:34,574 INFO L124 PetriNetUnfolderBase]: 289/588 cut-off events. [2024-06-27 17:50:34,574 INFO L125 PetriNetUnfolderBase]: For 1776/1779 co-relation queries the response was YES. [2024-06-27 17:50:34,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1959 conditions, 588 events. 289/588 cut-off events. For 1776/1779 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3282 event pairs, 56 based on Foata normal form. 4/581 useless extension candidates. Maximal degree in co-relation 1926. Up to 387 conditions per place. [2024-06-27 17:50:34,577 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 54 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-06-27 17:50:34,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 76 transitions, 541 flow [2024-06-27 17:50:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-06-27 17:50:34,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6352941176470588 [2024-06-27 17:50:34,578 INFO L175 Difference]: Start difference. First operand has 76 places, 62 transitions, 381 flow. Second operand 5 states and 108 transitions. [2024-06-27 17:50:34,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 76 transitions, 541 flow [2024-06-27 17:50:34,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 513 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:34,583 INFO L231 Difference]: Finished difference. Result has 78 places, 62 transitions, 379 flow [2024-06-27 17:50:34,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=379, PETRI_PLACES=78, PETRI_TRANSITIONS=62} [2024-06-27 17:50:34,584 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2024-06-27 17:50:34,584 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 62 transitions, 379 flow [2024-06-27 17:50:34,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:34,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:34,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:50:34,585 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:34,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:34,585 INFO L85 PathProgramCache]: Analyzing trace with hash 348044772, now seen corresponding path program 1 times [2024-06-27 17:50:34,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:34,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159146254] [2024-06-27 17:50:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:34,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:34,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:34,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159146254] [2024-06-27 17:50:34,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159146254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:34,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:34,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:34,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264535172] [2024-06-27 17:50:34,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:34,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:50:34,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:34,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:50:34,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:50:34,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 34 [2024-06-27 17:50:34,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 62 transitions, 379 flow. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:34,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 34 [2024-06-27 17:50:34,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:34,781 INFO L124 PetriNetUnfolderBase]: 291/694 cut-off events. [2024-06-27 17:50:34,782 INFO L125 PetriNetUnfolderBase]: For 997/1026 co-relation queries the response was YES. [2024-06-27 17:50:34,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2045 conditions, 694 events. 291/694 cut-off events. For 997/1026 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4540 event pairs, 97 based on Foata normal form. 37/686 useless extension candidates. Maximal degree in co-relation 2011. Up to 354 conditions per place. [2024-06-27 17:50:34,786 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 27 selfloop transitions, 4 changer transitions 35/102 dead transitions. [2024-06-27 17:50:34,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 102 transitions, 723 flow [2024-06-27 17:50:34,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:34,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 17:50:34,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6596638655462185 [2024-06-27 17:50:34,788 INFO L175 Difference]: Start difference. First operand has 78 places, 62 transitions, 379 flow. Second operand 7 states and 157 transitions. [2024-06-27 17:50:34,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 102 transitions, 723 flow [2024-06-27 17:50:34,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 102 transitions, 695 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:34,796 INFO L231 Difference]: Finished difference. Result has 86 places, 62 transitions, 375 flow [2024-06-27 17:50:34,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=375, PETRI_PLACES=86, PETRI_TRANSITIONS=62} [2024-06-27 17:50:34,797 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 50 predicate places. [2024-06-27 17:50:34,797 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 62 transitions, 375 flow [2024-06-27 17:50:34,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:34,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:34,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:50:34,798 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:34,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:34,798 INFO L85 PathProgramCache]: Analyzing trace with hash -935646176, now seen corresponding path program 1 times [2024-06-27 17:50:34,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:34,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399138354] [2024-06-27 17:50:34,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:34,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:34,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:34,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399138354] [2024-06-27 17:50:34,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399138354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:34,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:34,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:34,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459782677] [2024-06-27 17:50:34,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:34,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:34,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:34,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:34,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:34,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:34,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 62 transitions, 375 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:34,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:34,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:34,975 INFO L124 PetriNetUnfolderBase]: 336/699 cut-off events. [2024-06-27 17:50:34,976 INFO L125 PetriNetUnfolderBase]: For 3208/3211 co-relation queries the response was YES. [2024-06-27 17:50:34,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2379 conditions, 699 events. 336/699 cut-off events. For 3208/3211 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4129 event pairs, 70 based on Foata normal form. 8/697 useless extension candidates. Maximal degree in co-relation 2340. Up to 270 conditions per place. [2024-06-27 17:50:34,980 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 60 selfloop transitions, 20 changer transitions 0/91 dead transitions. [2024-06-27 17:50:34,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 91 transitions, 655 flow [2024-06-27 17:50:34,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:34,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-27 17:50:34,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6512605042016807 [2024-06-27 17:50:34,981 INFO L175 Difference]: Start difference. First operand has 86 places, 62 transitions, 375 flow. Second operand 7 states and 155 transitions. [2024-06-27 17:50:34,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 91 transitions, 655 flow [2024-06-27 17:50:34,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 91 transitions, 608 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:34,989 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 393 flow [2024-06-27 17:50:34,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=393, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2024-06-27 17:50:34,989 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 46 predicate places. [2024-06-27 17:50:34,989 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 393 flow [2024-06-27 17:50:34,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:34,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:34,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:50:34,990 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:34,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:34,990 INFO L85 PathProgramCache]: Analyzing trace with hash 307467590, now seen corresponding path program 2 times [2024-06-27 17:50:34,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:34,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503569095] [2024-06-27 17:50:34,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:34,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:35,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:35,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503569095] [2024-06-27 17:50:35,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503569095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:35,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:35,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:35,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797888978] [2024-06-27 17:50:35,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:35,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:35,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:35,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:35,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:35,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:35,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 393 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:35,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:35,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:35,171 INFO L124 PetriNetUnfolderBase]: 368/766 cut-off events. [2024-06-27 17:50:35,172 INFO L125 PetriNetUnfolderBase]: For 3751/3754 co-relation queries the response was YES. [2024-06-27 17:50:35,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2435 conditions, 766 events. 368/766 cut-off events. For 3751/3754 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4741 event pairs, 95 based on Foata normal form. 10/766 useless extension candidates. Maximal degree in co-relation 2400. Up to 478 conditions per place. [2024-06-27 17:50:35,176 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 56 selfloop transitions, 20 changer transitions 0/87 dead transitions. [2024-06-27 17:50:35,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 605 flow [2024-06-27 17:50:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 17:50:35,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 17:50:35,177 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 393 flow. Second operand 7 states and 154 transitions. [2024-06-27 17:50:35,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 605 flow [2024-06-27 17:50:35,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 87 transitions, 566 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:35,184 INFO L231 Difference]: Finished difference. Result has 84 places, 62 transitions, 398 flow [2024-06-27 17:50:35,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=84, PETRI_TRANSITIONS=62} [2024-06-27 17:50:35,184 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 48 predicate places. [2024-06-27 17:50:35,185 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 62 transitions, 398 flow [2024-06-27 17:50:35,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:35,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:35,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:50:35,185 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:35,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:35,186 INFO L85 PathProgramCache]: Analyzing trace with hash 394155680, now seen corresponding path program 3 times [2024-06-27 17:50:35,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:35,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042037942] [2024-06-27 17:50:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:35,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:35,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:35,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042037942] [2024-06-27 17:50:35,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042037942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:35,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:35,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:35,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359095018] [2024-06-27 17:50:35,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:35,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:35,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:35,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:35,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:35,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:35,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 62 transitions, 398 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:35,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:35,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:35,386 INFO L124 PetriNetUnfolderBase]: 361/745 cut-off events. [2024-06-27 17:50:35,386 INFO L125 PetriNetUnfolderBase]: For 2947/2950 co-relation queries the response was YES. [2024-06-27 17:50:35,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 745 events. 361/745 cut-off events. For 2947/2950 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4564 event pairs, 72 based on Foata normal form. 8/743 useless extension candidates. Maximal degree in co-relation 2266. Up to 397 conditions per place. [2024-06-27 17:50:35,390 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 59 selfloop transitions, 20 changer transitions 0/90 dead transitions. [2024-06-27 17:50:35,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 624 flow [2024-06-27 17:50:35,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:35,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 17:50:35,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6596638655462185 [2024-06-27 17:50:35,391 INFO L175 Difference]: Start difference. First operand has 84 places, 62 transitions, 398 flow. Second operand 7 states and 157 transitions. [2024-06-27 17:50:35,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 624 flow [2024-06-27 17:50:35,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 90 transitions, 586 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:35,398 INFO L231 Difference]: Finished difference. Result has 86 places, 62 transitions, 403 flow [2024-06-27 17:50:35,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=403, PETRI_PLACES=86, PETRI_TRANSITIONS=62} [2024-06-27 17:50:35,398 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 50 predicate places. [2024-06-27 17:50:35,398 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 62 transitions, 403 flow [2024-06-27 17:50:35,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:35,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:35,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:50:35,399 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:35,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:35,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1220001474, now seen corresponding path program 4 times [2024-06-27 17:50:35,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:35,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431685745] [2024-06-27 17:50:35,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:35,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:35,461 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 17:50:35,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:35,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431685745] [2024-06-27 17:50:35,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431685745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:35,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:35,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:35,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802586831] [2024-06-27 17:50:35,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:35,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:35,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:35,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:35,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:35,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:35,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 62 transitions, 403 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:35,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:35,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:35,594 INFO L124 PetriNetUnfolderBase]: 393/817 cut-off events. [2024-06-27 17:50:35,595 INFO L125 PetriNetUnfolderBase]: For 3543/3546 co-relation queries the response was YES. [2024-06-27 17:50:35,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2483 conditions, 817 events. 393/817 cut-off events. For 3543/3546 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5175 event pairs, 96 based on Foata normal form. 10/818 useless extension candidates. Maximal degree in co-relation 2446. Up to 543 conditions per place. [2024-06-27 17:50:35,599 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 55 selfloop transitions, 18 changer transitions 0/84 dead transitions. [2024-06-27 17:50:35,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 84 transitions, 603 flow [2024-06-27 17:50:35,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:35,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-27 17:50:35,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2024-06-27 17:50:35,600 INFO L175 Difference]: Start difference. First operand has 86 places, 62 transitions, 403 flow. Second operand 6 states and 135 transitions. [2024-06-27 17:50:35,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 84 transitions, 603 flow [2024-06-27 17:50:35,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 84 transitions, 564 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:35,608 INFO L231 Difference]: Finished difference. Result has 87 places, 62 transitions, 404 flow [2024-06-27 17:50:35,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=404, PETRI_PLACES=87, PETRI_TRANSITIONS=62} [2024-06-27 17:50:35,608 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 51 predicate places. [2024-06-27 17:50:35,609 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 62 transitions, 404 flow [2024-06-27 17:50:35,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:35,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:35,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:50:35,609 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:35,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:35,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1214639094, now seen corresponding path program 5 times [2024-06-27 17:50:35,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:35,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657392617] [2024-06-27 17:50:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:35,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:35,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:35,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657392617] [2024-06-27 17:50:35,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657392617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:35,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:35,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:35,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650504082] [2024-06-27 17:50:35,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:35,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:35,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:35,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:35,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:35,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:35,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 62 transitions, 404 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:35,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:35,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:35,816 INFO L124 PetriNetUnfolderBase]: 425/903 cut-off events. [2024-06-27 17:50:35,817 INFO L125 PetriNetUnfolderBase]: For 3868/3871 co-relation queries the response was YES. [2024-06-27 17:50:35,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2662 conditions, 903 events. 425/903 cut-off events. For 3868/3871 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5928 event pairs, 105 based on Foata normal form. 10/909 useless extension candidates. Maximal degree in co-relation 2624. Up to 607 conditions per place. [2024-06-27 17:50:35,821 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 57 selfloop transitions, 22 changer transitions 0/90 dead transitions. [2024-06-27 17:50:35,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 90 transitions, 628 flow [2024-06-27 17:50:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-27 17:50:35,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6397058823529411 [2024-06-27 17:50:35,822 INFO L175 Difference]: Start difference. First operand has 87 places, 62 transitions, 404 flow. Second operand 8 states and 174 transitions. [2024-06-27 17:50:35,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 90 transitions, 628 flow [2024-06-27 17:50:35,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 594 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:35,831 INFO L231 Difference]: Finished difference. Result has 91 places, 62 transitions, 418 flow [2024-06-27 17:50:35,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=418, PETRI_PLACES=91, PETRI_TRANSITIONS=62} [2024-06-27 17:50:35,831 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 55 predicate places. [2024-06-27 17:50:35,831 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 62 transitions, 418 flow [2024-06-27 17:50:35,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:35,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:35,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:50:35,832 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:35,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:35,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1220149344, now seen corresponding path program 6 times [2024-06-27 17:50:35,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:35,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643616822] [2024-06-27 17:50:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:35,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:35,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:35,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643616822] [2024-06-27 17:50:35,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643616822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:35,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:35,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:35,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645427328] [2024-06-27 17:50:35,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:35,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:35,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:35,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:35,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:35,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:35,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 62 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:35,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:35,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:36,056 INFO L124 PetriNetUnfolderBase]: 434/917 cut-off events. [2024-06-27 17:50:36,057 INFO L125 PetriNetUnfolderBase]: For 3392/3395 co-relation queries the response was YES. [2024-06-27 17:50:36,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2689 conditions, 917 events. 434/917 cut-off events. For 3392/3395 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6041 event pairs, 88 based on Foata normal form. 8/915 useless extension candidates. Maximal degree in co-relation 2650. Up to 370 conditions per place. [2024-06-27 17:50:36,061 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 57 selfloop transitions, 19 changer transitions 0/87 dead transitions. [2024-06-27 17:50:36,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 87 transitions, 632 flow [2024-06-27 17:50:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-27 17:50:36,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6715686274509803 [2024-06-27 17:50:36,063 INFO L175 Difference]: Start difference. First operand has 91 places, 62 transitions, 418 flow. Second operand 6 states and 137 transitions. [2024-06-27 17:50:36,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 87 transitions, 632 flow [2024-06-27 17:50:36,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 87 transitions, 590 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:36,071 INFO L231 Difference]: Finished difference. Result has 91 places, 62 transitions, 418 flow [2024-06-27 17:50:36,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=91, PETRI_TRANSITIONS=62} [2024-06-27 17:50:36,071 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 55 predicate places. [2024-06-27 17:50:36,071 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 62 transitions, 418 flow [2024-06-27 17:50:36,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:36,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:36,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:50:36,072 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:36,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:36,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1214423892, now seen corresponding path program 1 times [2024-06-27 17:50:36,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:36,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429916594] [2024-06-27 17:50:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:36,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:36,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:36,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429916594] [2024-06-27 17:50:36,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429916594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:36,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:36,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:36,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145580350] [2024-06-27 17:50:36,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:36,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:36,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:36,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:36,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:36,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:36,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 62 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:36,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:36,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:36,298 INFO L124 PetriNetUnfolderBase]: 456/972 cut-off events. [2024-06-27 17:50:36,298 INFO L125 PetriNetUnfolderBase]: For 3731/3734 co-relation queries the response was YES. [2024-06-27 17:50:36,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2822 conditions, 972 events. 456/972 cut-off events. For 3731/3734 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6527 event pairs, 106 based on Foata normal form. 8/975 useless extension candidates. Maximal degree in co-relation 2782. Up to 522 conditions per place. [2024-06-27 17:50:36,303 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 58 selfloop transitions, 24 changer transitions 0/93 dead transitions. [2024-06-27 17:50:36,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 93 transitions, 658 flow [2024-06-27 17:50:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:36,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:36,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-27 17:50:36,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 17:50:36,304 INFO L175 Difference]: Start difference. First operand has 91 places, 62 transitions, 418 flow. Second operand 8 states and 176 transitions. [2024-06-27 17:50:36,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 93 transitions, 658 flow [2024-06-27 17:50:36,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 93 transitions, 622 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:36,315 INFO L231 Difference]: Finished difference. Result has 95 places, 62 transitions, 433 flow [2024-06-27 17:50:36,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=433, PETRI_PLACES=95, PETRI_TRANSITIONS=62} [2024-06-27 17:50:36,316 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 59 predicate places. [2024-06-27 17:50:36,316 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 62 transitions, 433 flow [2024-06-27 17:50:36,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:36,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:36,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:50:36,317 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:36,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:36,317 INFO L85 PathProgramCache]: Analyzing trace with hash 88635022, now seen corresponding path program 2 times [2024-06-27 17:50:36,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:36,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343727806] [2024-06-27 17:50:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:36,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:36,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:36,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343727806] [2024-06-27 17:50:36,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343727806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:36,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:36,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:36,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444892604] [2024-06-27 17:50:36,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:36,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:36,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:36,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:36,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:36,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:36,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 62 transitions, 433 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:36,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:36,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:36,582 INFO L124 PetriNetUnfolderBase]: 478/1035 cut-off events. [2024-06-27 17:50:36,582 INFO L125 PetriNetUnfolderBase]: For 3897/3897 co-relation queries the response was YES. [2024-06-27 17:50:36,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2985 conditions, 1035 events. 478/1035 cut-off events. For 3897/3897 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7136 event pairs, 95 based on Foata normal form. 6/1036 useless extension candidates. Maximal degree in co-relation 2944. Up to 600 conditions per place. [2024-06-27 17:50:36,586 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 58 selfloop transitions, 27 changer transitions 0/96 dead transitions. [2024-06-27 17:50:36,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 96 transitions, 687 flow [2024-06-27 17:50:36,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:36,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 17:50:36,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6654411764705882 [2024-06-27 17:50:36,588 INFO L175 Difference]: Start difference. First operand has 95 places, 62 transitions, 433 flow. Second operand 8 states and 181 transitions. [2024-06-27 17:50:36,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 96 transitions, 687 flow [2024-06-27 17:50:36,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 96 transitions, 640 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:36,601 INFO L231 Difference]: Finished difference. Result has 97 places, 62 transitions, 443 flow [2024-06-27 17:50:36,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=443, PETRI_PLACES=97, PETRI_TRANSITIONS=62} [2024-06-27 17:50:36,602 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 61 predicate places. [2024-06-27 17:50:36,602 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 62 transitions, 443 flow [2024-06-27 17:50:36,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:36,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:36,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:50:36,603 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:36,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:36,603 INFO L85 PathProgramCache]: Analyzing trace with hash 354332302, now seen corresponding path program 3 times [2024-06-27 17:50:36,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:36,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402741262] [2024-06-27 17:50:36,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:36,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:36,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:36,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402741262] [2024-06-27 17:50:36,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402741262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:36,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:36,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:36,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984241050] [2024-06-27 17:50:36,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:36,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:36,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:36,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:36,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:36,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 17:50:36,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 62 transitions, 443 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:36,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 17:50:36,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:36,814 INFO L124 PetriNetUnfolderBase]: 471/1007 cut-off events. [2024-06-27 17:50:36,814 INFO L125 PetriNetUnfolderBase]: For 2716/2719 co-relation queries the response was YES. [2024-06-27 17:50:36,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2839 conditions, 1007 events. 471/1007 cut-off events. For 2716/2719 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6900 event pairs, 100 based on Foata normal form. 8/1005 useless extension candidates. Maximal degree in co-relation 2797. Up to 482 conditions per place. [2024-06-27 17:50:36,818 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 60 selfloop transitions, 19 changer transitions 0/90 dead transitions. [2024-06-27 17:50:36,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 90 transitions, 625 flow [2024-06-27 17:50:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:36,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-27 17:50:36,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6512605042016807 [2024-06-27 17:50:36,820 INFO L175 Difference]: Start difference. First operand has 97 places, 62 transitions, 443 flow. Second operand 7 states and 155 transitions. [2024-06-27 17:50:36,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 90 transitions, 625 flow [2024-06-27 17:50:36,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 90 transitions, 494 flow, removed 3 selfloop flow, removed 28 redundant places. [2024-06-27 17:50:36,825 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 306 flow [2024-06-27 17:50:36,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=306, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2024-06-27 17:50:36,825 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2024-06-27 17:50:36,825 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 306 flow [2024-06-27 17:50:36,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:36,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:36,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:50:36,826 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:36,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:36,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1898367653, now seen corresponding path program 1 times [2024-06-27 17:50:36,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:36,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406667913] [2024-06-27 17:50:36,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:36,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:36,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:36,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406667913] [2024-06-27 17:50:36,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406667913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:36,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:36,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:36,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848357545] [2024-06-27 17:50:36,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:36,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:50:36,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:36,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:50:36,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:50:36,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 34 [2024-06-27 17:50:36,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 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 17:50:36,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:36,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 34 [2024-06-27 17:50:36,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:37,016 INFO L124 PetriNetUnfolderBase]: 323/933 cut-off events. [2024-06-27 17:50:37,017 INFO L125 PetriNetUnfolderBase]: For 274/277 co-relation queries the response was YES. [2024-06-27 17:50:37,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2054 conditions, 933 events. 323/933 cut-off events. For 274/277 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7516 event pairs, 173 based on Foata normal form. 29/855 useless extension candidates. Maximal degree in co-relation 2034. Up to 484 conditions per place. [2024-06-27 17:50:37,020 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 14 selfloop transitions, 5 changer transitions 15/79 dead transitions. [2024-06-27 17:50:37,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 79 transitions, 442 flow [2024-06-27 17:50:37,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:37,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-27 17:50:37,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6512605042016807 [2024-06-27 17:50:37,022 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 306 flow. Second operand 7 states and 155 transitions. [2024-06-27 17:50:37,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 79 transitions, 442 flow [2024-06-27 17:50:37,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 79 transitions, 397 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:37,025 INFO L231 Difference]: Finished difference. Result has 80 places, 61 transitions, 294 flow [2024-06-27 17:50:37,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=294, PETRI_PLACES=80, PETRI_TRANSITIONS=61} [2024-06-27 17:50:37,026 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 44 predicate places. [2024-06-27 17:50:37,026 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 61 transitions, 294 flow [2024-06-27 17:50:37,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 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 17:50:37,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:37,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:37,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:50:37,027 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:37,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:37,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1310272971, now seen corresponding path program 1 times [2024-06-27 17:50:37,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:37,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173302524] [2024-06-27 17:50:37,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:37,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:37,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:37,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173302524] [2024-06-27 17:50:37,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173302524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:37,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:37,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:37,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033992043] [2024-06-27 17:50:37,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:37,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:50:37,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:37,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:50:37,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:50:37,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 34 [2024-06-27 17:50:37,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 61 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:37,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 34 [2024-06-27 17:50:37,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:37,289 INFO L124 PetriNetUnfolderBase]: 417/1125 cut-off events. [2024-06-27 17:50:37,289 INFO L125 PetriNetUnfolderBase]: For 757/782 co-relation queries the response was YES. [2024-06-27 17:50:37,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2775 conditions, 1125 events. 417/1125 cut-off events. For 757/782 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9045 event pairs, 119 based on Foata normal form. 54/1100 useless extension candidates. Maximal degree in co-relation 2750. Up to 394 conditions per place. [2024-06-27 17:50:37,292 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 20 selfloop transitions, 12 changer transitions 15/82 dead transitions. [2024-06-27 17:50:37,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 458 flow [2024-06-27 17:50:37,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:37,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-27 17:50:37,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6512605042016807 [2024-06-27 17:50:37,295 INFO L175 Difference]: Start difference. First operand has 80 places, 61 transitions, 294 flow. Second operand 7 states and 155 transitions. [2024-06-27 17:50:37,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 458 flow [2024-06-27 17:50:37,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 82 transitions, 424 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:37,300 INFO L231 Difference]: Finished difference. Result has 81 places, 61 transitions, 322 flow [2024-06-27 17:50:37,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=322, PETRI_PLACES=81, PETRI_TRANSITIONS=61} [2024-06-27 17:50:37,300 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 45 predicate places. [2024-06-27 17:50:37,301 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 61 transitions, 322 flow [2024-06-27 17:50:37,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:37,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:37,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:50:37,301 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:37,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:37,301 INFO L85 PathProgramCache]: Analyzing trace with hash -147013052, now seen corresponding path program 1 times [2024-06-27 17:50:37,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:37,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784786124] [2024-06-27 17:50:37,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:37,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:37,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:37,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784786124] [2024-06-27 17:50:37,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784786124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:37,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:37,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:37,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956385713] [2024-06-27 17:50:37,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:37,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:37,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:37,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:37,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:37,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 34 [2024-06-27 17:50:37,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 61 transitions, 322 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:37,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 34 [2024-06-27 17:50:37,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:37,509 INFO L124 PetriNetUnfolderBase]: 282/806 cut-off events. [2024-06-27 17:50:37,509 INFO L125 PetriNetUnfolderBase]: For 619/636 co-relation queries the response was YES. [2024-06-27 17:50:37,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2014 conditions, 806 events. 282/806 cut-off events. For 619/636 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5987 event pairs, 56 based on Foata normal form. 48/798 useless extension candidates. Maximal degree in co-relation 1989. Up to 212 conditions per place. [2024-06-27 17:50:37,511 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 19 selfloop transitions, 4 changer transitions 51/93 dead transitions. [2024-06-27 17:50:37,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 93 transitions, 550 flow [2024-06-27 17:50:37,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-27 17:50:37,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6433823529411765 [2024-06-27 17:50:37,513 INFO L175 Difference]: Start difference. First operand has 81 places, 61 transitions, 322 flow. Second operand 8 states and 175 transitions. [2024-06-27 17:50:37,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 93 transitions, 550 flow [2024-06-27 17:50:37,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 93 transitions, 510 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:37,516 INFO L231 Difference]: Finished difference. Result has 84 places, 34 transitions, 159 flow [2024-06-27 17:50:37,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=159, PETRI_PLACES=84, PETRI_TRANSITIONS=34} [2024-06-27 17:50:37,517 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 48 predicate places. [2024-06-27 17:50:37,517 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 34 transitions, 159 flow [2024-06-27 17:50:37,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:37,517 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 17:50:37,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:50:37,517 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:37,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:37,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1097989510, now seen corresponding path program 1 times [2024-06-27 17:50:37,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:37,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359111489] [2024-06-27 17:50:37,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:37,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:37,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:37,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359111489] [2024-06-27 17:50:37,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359111489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:37,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:37,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:50:37,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165411083] [2024-06-27 17:50:37,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:37,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:50:37,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:37,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:50:37,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:50:37,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 34 [2024-06-27 17:50:37,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 34 transitions, 159 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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 17:50:37,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:37,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 34 [2024-06-27 17:50:37,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:37,605 INFO L124 PetriNetUnfolderBase]: 116/330 cut-off events. [2024-06-27 17:50:37,605 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2024-06-27 17:50:37,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 330 events. 116/330 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1724 event pairs, 26 based on Foata normal form. 21/329 useless extension candidates. Maximal degree in co-relation 785. Up to 127 conditions per place. [2024-06-27 17:50:37,606 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 15 selfloop transitions, 4 changer transitions 8/43 dead transitions. [2024-06-27 17:50:37,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 43 transitions, 235 flow [2024-06-27 17:50:37,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:50:37,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:50:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-27 17:50:37,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-06-27 17:50:37,607 INFO L175 Difference]: Start difference. First operand has 84 places, 34 transitions, 159 flow. Second operand 4 states and 102 transitions. [2024-06-27 17:50:37,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 43 transitions, 235 flow [2024-06-27 17:50:37,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 181 flow, removed 7 selfloop flow, removed 20 redundant places. [2024-06-27 17:50:37,609 INFO L231 Difference]: Finished difference. Result has 50 places, 30 transitions, 105 flow [2024-06-27 17:50:37,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=50, PETRI_TRANSITIONS=30} [2024-06-27 17:50:37,609 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 14 predicate places. [2024-06-27 17:50:37,609 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 30 transitions, 105 flow [2024-06-27 17:50:37,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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 17:50:37,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:37,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:37,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:50:37,610 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:50:37,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:37,610 INFO L85 PathProgramCache]: Analyzing trace with hash 760116369, now seen corresponding path program 1 times [2024-06-27 17:50:37,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:37,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373258729] [2024-06-27 17:50:37,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:37,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:37,656 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 17:50:37,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:37,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373258729] [2024-06-27 17:50:37,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373258729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:37,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:37,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:37,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247120504] [2024-06-27 17:50:37,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:37,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:50:37,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:37,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:50:37,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:50:37,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 34 [2024-06-27 17:50:37,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 30 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:37,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 34 [2024-06-27 17:50:37,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:37,703 INFO L124 PetriNetUnfolderBase]: 48/138 cut-off events. [2024-06-27 17:50:37,704 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-06-27 17:50:37,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 138 events. 48/138 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 464 event pairs, 2 based on Foata normal form. 12/138 useless extension candidates. Maximal degree in co-relation 347. Up to 44 conditions per place. [2024-06-27 17:50:37,704 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 0 selfloop transitions, 0 changer transitions 35/35 dead transitions. [2024-06-27 17:50:37,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 35 transitions, 160 flow [2024-06-27 17:50:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:37,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:37,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 17:50:37,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6941176470588235 [2024-06-27 17:50:37,705 INFO L175 Difference]: Start difference. First operand has 50 places, 30 transitions, 105 flow. Second operand 5 states and 118 transitions. [2024-06-27 17:50:37,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 35 transitions, 160 flow [2024-06-27 17:50:37,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 35 transitions, 133 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:37,706 INFO L231 Difference]: Finished difference. Result has 41 places, 0 transitions, 0 flow [2024-06-27 17:50:37,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=41, PETRI_TRANSITIONS=0} [2024-06-27 17:50:37,707 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2024-06-27 17:50:37,707 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 0 transitions, 0 flow [2024-06-27 17:50:37,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-06-27 17:50:37,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-06-27 17:50:37,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 17:50:37,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-06-27 17:50:37,711 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2024-06-27 17:50:37,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:50:37,711 INFO L445 BasicCegarLoop]: Path program histogram: [6, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:37,714 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 17:50:37,714 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 17:50:37,717 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 17:50:37,717 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 17:50:37,718 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 05:50:37 BasicIcfg [2024-06-27 17:50:37,718 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 17:50:37,718 INFO L158 Benchmark]: Toolchain (without parser) took 7906.14ms. Allocated memory was 216.0MB in the beginning and 404.8MB in the end (delta: 188.7MB). Free memory was 187.2MB in the beginning and 204.0MB in the end (delta: -16.8MB). Peak memory consumption was 170.8MB. Max. memory is 16.1GB. [2024-06-27 17:50:37,719 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 125.8MB. Free memory is still 90.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 17:50:37,719 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 125.8MB. Free memory is still 98.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 17:50:37,719 INFO L158 Benchmark]: CACSL2BoogieTranslator took 438.70ms. Allocated memory is still 216.0MB. Free memory was 187.2MB in the beginning and 162.0MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-27 17:50:37,719 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.04ms. Allocated memory is still 216.0MB. Free memory was 162.0MB in the beginning and 159.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 17:50:37,719 INFO L158 Benchmark]: Boogie Preprocessor took 68.66ms. Allocated memory is still 216.0MB. Free memory was 159.9MB in the beginning and 157.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 17:50:37,720 INFO L158 Benchmark]: RCFGBuilder took 440.89ms. Allocated memory is still 216.0MB. Free memory was 157.8MB in the beginning and 139.0MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-06-27 17:50:37,720 INFO L158 Benchmark]: TraceAbstraction took 6918.46ms. Allocated memory was 216.0MB in the beginning and 404.8MB in the end (delta: 188.7MB). Free memory was 138.0MB in the beginning and 204.0MB in the end (delta: -66.0MB). Peak memory consumption was 122.6MB. Max. memory is 16.1GB. [2024-06-27 17:50:37,721 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 125.8MB. Free memory is still 90.4MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.15ms. Allocated memory is still 125.8MB. Free memory is still 98.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 438.70ms. Allocated memory is still 216.0MB. Free memory was 187.2MB in the beginning and 162.0MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.04ms. Allocated memory is still 216.0MB. Free memory was 162.0MB in the beginning and 159.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.66ms. Allocated memory is still 216.0MB. Free memory was 159.9MB in the beginning and 157.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 440.89ms. Allocated memory is still 216.0MB. Free memory was 157.8MB in the beginning and 139.0MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 6918.46ms. Allocated memory was 216.0MB in the beginning and 404.8MB in the end (delta: 188.7MB). Free memory was 138.0MB in the beginning and 204.0MB in the end (delta: -66.0MB). Peak memory consumption was 122.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 761]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 762]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 50 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 6.8s, OverallIterations: 33, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1696 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1340 mSDsluCounter, 535 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 329 mSDsCounter, 129 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4350 IncrementalHoareTripleChecker+Invalid, 4479 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 129 mSolverCounterUnsat, 206 mSDtfsCounter, 4350 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 174 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=443occurred in iteration=27, InterpolantAutomatonStates: 203, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 480 NumberOfCodeBlocks, 480 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 447 ConstructedInterpolants, 0 QuantifiedInterpolants, 2927 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 33 InterpolantComputations, 33 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-27 17:50:37,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE