./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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe010_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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.2024-05-21_14-57-05.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 11:20:42,659 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:20:42,700 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:20:42,705 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:20:42,706 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:20:42,731 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:20:42,735 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:20:42,736 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:20:42,736 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:20:42,740 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:20:42,740 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:20:42,740 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:20:42,741 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:20:42,742 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:20:42,742 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:20:42,743 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:20:42,743 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:20:42,743 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:20:42,743 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:20:42,743 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:20:42,744 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:20:42,744 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:20:42,744 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:20:42,745 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:20:42,745 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:20:42,745 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:20:42,745 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:20:42,745 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:20:42,746 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:20:42,746 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:20:42,747 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:20:42,747 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:20:42,747 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:20:42,747 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:20:42,748 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:20:42,748 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:20:42,748 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:20:42,748 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:20:42,748 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:20:42,748 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:20:42,749 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:20:42,749 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:20:42,749 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:20:42,749 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:20:42,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:20:42,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:20:42,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:20:42,986 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:20:42,986 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:20:42,987 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe010_tso.i [2024-06-14 11:20:43,974 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:20:44,155 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:20:44,155 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe010_tso.i [2024-06-14 11:20:44,165 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/514cac393/9abd712176794b37833d5d8a0e512df2/FLAG80017974e [2024-06-14 11:20:44,176 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/514cac393/9abd712176794b37833d5d8a0e512df2 [2024-06-14 11:20:44,178 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:20:44,178 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:20:44,179 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe010_tso.yml/witness.yml [2024-06-14 11:20:44,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:20:44,235 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:20:44,235 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:20:44,236 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:20:44,251 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:20:44,252 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:20:44" (1/2) ... [2024-06-14 11:20:44,253 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556bcd92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:20:44, skipping insertion in model container [2024-06-14 11:20:44,253 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:20:44" (1/2) ... [2024-06-14 11:20:44,254 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3019ec46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:20:44, skipping insertion in model container [2024-06-14 11:20:44,254 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:20:44" (2/2) ... [2024-06-14 11:20:44,254 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556bcd92 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:20:44, skipping insertion in model container [2024-06-14 11:20:44,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:20:44" (2/2) ... [2024-06-14 11:20:44,255 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:20:44,282 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:20:44,284 INFO L97 edCorrectnessWitness]: Location invariant before [L761-L761] (((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 11:20:44,284 INFO L97 edCorrectnessWitness]: Location invariant before [L762-L762] (((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 11:20:44,284 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:20:44,284 INFO L106 edCorrectnessWitness]: ghost_update [L759-L759] multithreaded = 1; [2024-06-14 11:20:44,319 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:20:44,558 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:20:44,568 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:20:44,649 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:20:44,685 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:20:44,685 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:20:44 WrapperNode [2024-06-14 11:20:44,685 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:20:44,686 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:20:44,686 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:20:44,686 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:20:44,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:20:44" (1/1) ... [2024-06-14 11:20:44,720 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:20:44" (1/1) ... [2024-06-14 11:20:44,734 INFO L138 Inliner]: procedures = 174, calls = 33, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 56 [2024-06-14 11:20:44,743 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:20:44,743 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:20:44,743 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:20:44,744 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:20:44,752 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:20:44" (1/1) ... [2024-06-14 11:20:44,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:20:44" (1/1) ... [2024-06-14 11:20:44,753 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:20:44" (1/1) ... [2024-06-14 11:20:44,768 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]. [2024-06-14 11:20:44,768 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:20:44" (1/1) ... [2024-06-14 11:20:44,768 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:20:44" (1/1) ... [2024-06-14 11:20:44,772 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:20:44" (1/1) ... [2024-06-14 11:20:44,773 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:20:44" (1/1) ... [2024-06-14 11:20:44,774 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:20:44" (1/1) ... [2024-06-14 11:20:44,774 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:20:44" (1/1) ... [2024-06-14 11:20:44,776 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:20:44,776 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:20:44,776 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:20:44,777 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:20:44,777 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:20:44" (1/1) ... [2024-06-14 11:20:44,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:20:44,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:20:44,796 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) [2024-06-14 11:20:44,813 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 [2024-06-14 11:20:44,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:20:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:20:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:20:44,823 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:20:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:20:44,823 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:20:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:20:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:20:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:20:44,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:20:44,824 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:20:44,907 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:20:44,908 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:20:45,134 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:20:45,134 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:20:45,230 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:20:45,231 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:20:45,232 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:20:45 BoogieIcfgContainer [2024-06-14 11:20:45,232 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:20:45,234 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:20:45,235 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:20:45,237 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:20:45,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:20:44" (1/4) ... [2024-06-14 11:20:45,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e2d267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:20:45, skipping insertion in model container [2024-06-14 11:20:45,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:20:44" (2/4) ... [2024-06-14 11:20:45,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e2d267 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:20:45, skipping insertion in model container [2024-06-14 11:20:45,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:20:44" (3/4) ... [2024-06-14 11:20:45,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e2d267 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:20:45, skipping insertion in model container [2024-06-14 11:20:45,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:20:45" (4/4) ... [2024-06-14 11:20:45,240 INFO L112 eAbstractionObserver]: Analyzing ICFG safe010_tso.i [2024-06-14 11:20:45,252 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:20:45,252 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-14 11:20:45,253 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:20:45,279 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:20:45,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 30 transitions, 68 flow [2024-06-14 11:20:45,326 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2024-06-14 11:20:45,326 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:20:45,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 28 events. 0/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:20:45,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 30 transitions, 68 flow [2024-06-14 11:20:45,331 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 22 transitions, 50 flow [2024-06-14 11:20:45,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:20:45,341 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;@4e78870c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:20:45,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-14 11:20:45,344 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:20:45,344 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:20:45,344 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:20:45,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:45,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:20:45,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:45,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:45,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1479839469, now seen corresponding path program 1 times [2024-06-14 11:20:45,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:45,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328089123] [2024-06-14 11:20:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:45,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:45,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:45,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328089123] [2024-06-14 11:20:45,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328089123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:45,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:45,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:20:45,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829263838] [2024-06-14 11:20:45,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:45,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:20:45,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:45,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:20:45,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:20:45,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 30 [2024-06-14 11:20:45,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:45,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:45,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 30 [2024-06-14 11:20:45,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:45,853 INFO L124 PetriNetUnfolderBase]: 87/184 cut-off events. [2024-06-14 11:20:45,853 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-14 11:20:45,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 184 events. 87/184 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 681 event pairs, 47 based on Foata normal form. 1/172 useless extension candidates. Maximal degree in co-relation 354. Up to 161 conditions per place. [2024-06-14 11:20:45,859 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 20 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-06-14 11:20:45,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 111 flow [2024-06-14 11:20:45,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:20:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:20:45,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-06-14 11:20:45,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-14 11:20:45,869 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 50 flow. Second operand 3 states and 58 transitions. [2024-06-14 11:20:45,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 111 flow [2024-06-14 11:20:45,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 28 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-14 11:20:45,875 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 69 flow [2024-06-14 11:20:45,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-06-14 11:20:45,880 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2024-06-14 11:20:45,881 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 69 flow [2024-06-14 11:20:45,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:45,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:45,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:45,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:20:45,882 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:45,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:45,882 INFO L85 PathProgramCache]: Analyzing trace with hash 491941650, now seen corresponding path program 1 times [2024-06-14 11:20:45,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:45,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410038807] [2024-06-14 11:20:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:45,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:46,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:46,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410038807] [2024-06-14 11:20:46,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410038807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:46,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:46,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:20:46,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414193085] [2024-06-14 11:20:46,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:46,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:20:46,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:46,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:20:46,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:20:46,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 30 [2024-06-14 11:20:46,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:46,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:46,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 30 [2024-06-14 11:20:46,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:46,149 INFO L124 PetriNetUnfolderBase]: 88/186 cut-off events. [2024-06-14 11:20:46,151 INFO L125 PetriNetUnfolderBase]: For 36/39 co-relation queries the response was YES. [2024-06-14 11:20:46,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 186 events. 88/186 cut-off events. For 36/39 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 670 event pairs, 35 based on Foata normal form. 5/187 useless extension candidates. Maximal degree in co-relation 413. Up to 142 conditions per place. [2024-06-14 11:20:46,153 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 26 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2024-06-14 11:20:46,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 39 transitions, 177 flow [2024-06-14 11:20:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:20:46,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:20:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-06-14 11:20:46,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-14 11:20:46,156 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 69 flow. Second operand 4 states and 79 transitions. [2024-06-14 11:20:46,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 39 transitions, 177 flow [2024-06-14 11:20:46,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 39 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:20:46,160 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 121 flow [2024-06-14 11:20:46,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-06-14 11:20:46,161 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2024-06-14 11:20:46,161 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 121 flow [2024-06-14 11:20:46,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:46,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:46,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:46,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:20:46,163 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:46,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:46,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1941296084, now seen corresponding path program 1 times [2024-06-14 11:20:46,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:46,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390899020] [2024-06-14 11:20:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:46,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:46,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:46,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390899020] [2024-06-14 11:20:46,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390899020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:46,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:46,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:20:46,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449652122] [2024-06-14 11:20:46,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:46,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:20:46,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:46,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:20:46,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:20:46,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:46,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:46,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:46,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:46,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:46,362 INFO L124 PetriNetUnfolderBase]: 103/216 cut-off events. [2024-06-14 11:20:46,363 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2024-06-14 11:20:46,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 216 events. 103/216 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 768 event pairs, 29 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 585. Up to 171 conditions per place. [2024-06-14 11:20:46,367 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 37 selfloop transitions, 7 changer transitions 0/48 dead transitions. [2024-06-14 11:20:46,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 48 transitions, 260 flow [2024-06-14 11:20:46,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:20:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:20:46,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-14 11:20:46,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2024-06-14 11:20:46,371 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 121 flow. Second operand 5 states and 88 transitions. [2024-06-14 11:20:46,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 48 transitions, 260 flow [2024-06-14 11:20:46,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 48 transitions, 258 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 11:20:46,376 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 175 flow [2024-06-14 11:20:46,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2024-06-14 11:20:46,377 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2024-06-14 11:20:46,377 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 175 flow [2024-06-14 11:20:46,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:46,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:46,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:46,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:20:46,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:46,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:46,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1569715157, now seen corresponding path program 1 times [2024-06-14 11:20:46,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:46,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104283629] [2024-06-14 11:20:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:46,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:46,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:46,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104283629] [2024-06-14 11:20:46,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104283629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:46,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:46,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:20:46,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702200520] [2024-06-14 11:20:46,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:46,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:20:46,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:46,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:20:46,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:20:46,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:46,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:46,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:46,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:46,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:46,621 INFO L124 PetriNetUnfolderBase]: 99/208 cut-off events. [2024-06-14 11:20:46,622 INFO L125 PetriNetUnfolderBase]: For 256/256 co-relation queries the response was YES. [2024-06-14 11:20:46,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665 conditions, 208 events. 99/208 cut-off events. For 256/256 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 734 event pairs, 13 based on Foata normal form. 4/211 useless extension candidates. Maximal degree in co-relation 642. Up to 145 conditions per place. [2024-06-14 11:20:46,624 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 37 selfloop transitions, 8 changer transitions 0/49 dead transitions. [2024-06-14 11:20:46,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 49 transitions, 291 flow [2024-06-14 11:20:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:46,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-14 11:20:46,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 11:20:46,628 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 175 flow. Second operand 6 states and 99 transitions. [2024-06-14 11:20:46,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 49 transitions, 291 flow [2024-06-14 11:20:46,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 291 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-14 11:20:46,632 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 187 flow [2024-06-14 11:20:46,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2024-06-14 11:20:46,633 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2024-06-14 11:20:46,633 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 187 flow [2024-06-14 11:20:46,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:46,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:46,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:46,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:20:46,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:46,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:46,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2042257444, now seen corresponding path program 1 times [2024-06-14 11:20:46,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:46,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912382611] [2024-06-14 11:20:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:46,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:46,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:46,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912382611] [2024-06-14 11:20:46,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912382611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:46,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:46,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:20:46,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370514222] [2024-06-14 11:20:46,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:46,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:20:46,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:46,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:20:46,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:20:46,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:46,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 187 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:46,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:46,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:46,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:46,855 INFO L124 PetriNetUnfolderBase]: 94/198 cut-off events. [2024-06-14 11:20:46,856 INFO L125 PetriNetUnfolderBase]: For 405/407 co-relation queries the response was YES. [2024-06-14 11:20:46,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 198 events. 94/198 cut-off events. For 405/407 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 699 event pairs, 30 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 649. Up to 147 conditions per place. [2024-06-14 11:20:46,857 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 27 selfloop transitions, 9 changer transitions 0/40 dead transitions. [2024-06-14 11:20:46,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 40 transitions, 271 flow [2024-06-14 11:20:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:20:46,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:20:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2024-06-14 11:20:46,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-14 11:20:46,858 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 187 flow. Second operand 4 states and 71 transitions. [2024-06-14 11:20:46,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 40 transitions, 271 flow [2024-06-14 11:20:46,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 250 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 11:20:46,860 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 191 flow [2024-06-14 11:20:46,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2024-06-14 11:20:46,861 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2024-06-14 11:20:46,861 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 191 flow [2024-06-14 11:20:46,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:46,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:46,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:46,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:20:46,862 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:46,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:46,862 INFO L85 PathProgramCache]: Analyzing trace with hash -944563057, now seen corresponding path program 1 times [2024-06-14 11:20:46,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:46,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367528644] [2024-06-14 11:20:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:46,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:46,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:46,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367528644] [2024-06-14 11:20:46,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367528644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:46,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:46,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:20:46,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134299810] [2024-06-14 11:20:46,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:46,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:20:46,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:46,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:20:46,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:20:46,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:46,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 191 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:46,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:46,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:46,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:47,014 INFO L124 PetriNetUnfolderBase]: 102/214 cut-off events. [2024-06-14 11:20:47,014 INFO L125 PetriNetUnfolderBase]: For 417/417 co-relation queries the response was YES. [2024-06-14 11:20:47,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 214 events. 102/214 cut-off events. For 417/417 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 767 event pairs, 25 based on Foata normal form. 1/212 useless extension candidates. Maximal degree in co-relation 707. Up to 131 conditions per place. [2024-06-14 11:20:47,016 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 35 selfloop transitions, 18 changer transitions 0/57 dead transitions. [2024-06-14 11:20:47,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 385 flow [2024-06-14 11:20:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:47,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 11:20:47,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-14 11:20:47,018 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 191 flow. Second operand 6 states and 109 transitions. [2024-06-14 11:20:47,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 385 flow [2024-06-14 11:20:47,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 57 transitions, 363 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 11:20:47,020 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 248 flow [2024-06-14 11:20:47,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=248, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-06-14 11:20:47,023 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2024-06-14 11:20:47,023 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 248 flow [2024-06-14 11:20:47,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:47,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:47,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:47,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:20:47,024 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:47,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:47,025 INFO L85 PathProgramCache]: Analyzing trace with hash 184000129, now seen corresponding path program 2 times [2024-06-14 11:20:47,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:47,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251869189] [2024-06-14 11:20:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:47,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:47,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:47,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251869189] [2024-06-14 11:20:47,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251869189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:47,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:47,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:20:47,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696861362] [2024-06-14 11:20:47,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:47,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:20:47,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:47,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:20:47,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:20:47,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:47,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 248 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:47,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:47,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:47,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:47,241 INFO L124 PetriNetUnfolderBase]: 108/227 cut-off events. [2024-06-14 11:20:47,241 INFO L125 PetriNetUnfolderBase]: For 567/567 co-relation queries the response was YES. [2024-06-14 11:20:47,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 227 events. 108/227 cut-off events. For 567/567 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 837 event pairs, 25 based on Foata normal form. 1/226 useless extension candidates. Maximal degree in co-relation 825. Up to 164 conditions per place. [2024-06-14 11:20:47,243 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 37 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2024-06-14 11:20:47,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 56 transitions, 408 flow [2024-06-14 11:20:47,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:47,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 11:20:47,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-06-14 11:20:47,244 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 248 flow. Second operand 6 states and 101 transitions. [2024-06-14 11:20:47,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 56 transitions, 408 flow [2024-06-14 11:20:47,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 391 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-14 11:20:47,246 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 302 flow [2024-06-14 11:20:47,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-14 11:20:47,247 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 24 predicate places. [2024-06-14 11:20:47,247 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 302 flow [2024-06-14 11:20:47,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:47,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:47,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:47,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:20:47,248 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:47,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:47,248 INFO L85 PathProgramCache]: Analyzing trace with hash 470166709, now seen corresponding path program 3 times [2024-06-14 11:20:47,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:47,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695034522] [2024-06-14 11:20:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:47,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:47,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:47,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695034522] [2024-06-14 11:20:47,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695034522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:47,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:47,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:20:47,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717290397] [2024-06-14 11:20:47,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:47,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:20:47,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:47,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:20:47,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:20:47,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:47,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:47,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:47,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:47,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:47,413 INFO L124 PetriNetUnfolderBase]: 109/231 cut-off events. [2024-06-14 11:20:47,414 INFO L125 PetriNetUnfolderBase]: For 769/769 co-relation queries the response was YES. [2024-06-14 11:20:47,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 904 conditions, 231 events. 109/231 cut-off events. For 769/769 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 861 event pairs, 25 based on Foata normal form. 2/231 useless extension candidates. Maximal degree in co-relation 875. Up to 143 conditions per place. [2024-06-14 11:20:47,415 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 37 selfloop transitions, 21 changer transitions 0/62 dead transitions. [2024-06-14 11:20:47,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 478 flow [2024-06-14 11:20:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 11:20:47,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-14 11:20:47,417 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 302 flow. Second operand 6 states and 107 transitions. [2024-06-14 11:20:47,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 478 flow [2024-06-14 11:20:47,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 441 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 11:20:47,419 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 340 flow [2024-06-14 11:20:47,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=340, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2024-06-14 11:20:47,420 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 28 predicate places. [2024-06-14 11:20:47,420 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 340 flow [2024-06-14 11:20:47,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:47,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:47,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:47,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:20:47,421 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:47,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:47,421 INFO L85 PathProgramCache]: Analyzing trace with hash 467731783, now seen corresponding path program 1 times [2024-06-14 11:20:47,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:47,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451393373] [2024-06-14 11:20:47,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:47,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:47,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:47,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451393373] [2024-06-14 11:20:47,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451393373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:47,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:47,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:20:47,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105132123] [2024-06-14 11:20:47,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:47,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:20:47,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:47,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:20:47,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:20:47,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:47,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:47,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:47,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:47,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:47,561 INFO L124 PetriNetUnfolderBase]: 110/236 cut-off events. [2024-06-14 11:20:47,562 INFO L125 PetriNetUnfolderBase]: For 1069/1071 co-relation queries the response was YES. [2024-06-14 11:20:47,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 236 events. 110/236 cut-off events. For 1069/1071 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 897 event pairs, 29 based on Foata normal form. 6/241 useless extension candidates. Maximal degree in co-relation 925. Up to 160 conditions per place. [2024-06-14 11:20:47,563 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 39 selfloop transitions, 13 changer transitions 0/56 dead transitions. [2024-06-14 11:20:47,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 56 transitions, 464 flow [2024-06-14 11:20:47,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:20:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:20:47,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-14 11:20:47,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-14 11:20:47,564 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 340 flow. Second operand 5 states and 84 transitions. [2024-06-14 11:20:47,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 56 transitions, 464 flow [2024-06-14 11:20:47,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 56 transitions, 423 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:20:47,567 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 336 flow [2024-06-14 11:20:47,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=336, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-06-14 11:20:47,568 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2024-06-14 11:20:47,568 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 336 flow [2024-06-14 11:20:47,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:47,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:47,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:47,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:20:47,569 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:47,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:47,569 INFO L85 PathProgramCache]: Analyzing trace with hash 783317051, now seen corresponding path program 1 times [2024-06-14 11:20:47,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:47,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953562530] [2024-06-14 11:20:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:47,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:47,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:47,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953562530] [2024-06-14 11:20:47,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953562530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:47,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:47,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:20:47,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018191502] [2024-06-14 11:20:47,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:47,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:20:47,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:47,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:20:47,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:20:47,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:47,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 336 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:47,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:47,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:47,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:47,705 INFO L124 PetriNetUnfolderBase]: 108/231 cut-off events. [2024-06-14 11:20:47,705 INFO L125 PetriNetUnfolderBase]: For 877/879 co-relation queries the response was YES. [2024-06-14 11:20:47,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 930 conditions, 231 events. 108/231 cut-off events. For 877/879 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 878 event pairs, 30 based on Foata normal form. 3/233 useless extension candidates. Maximal degree in co-relation 898. Up to 137 conditions per place. [2024-06-14 11:20:47,706 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 38 selfloop transitions, 18 changer transitions 0/60 dead transitions. [2024-06-14 11:20:47,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 60 transitions, 490 flow [2024-06-14 11:20:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 11:20:47,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-14 11:20:47,708 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 336 flow. Second operand 6 states and 102 transitions. [2024-06-14 11:20:47,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 60 transitions, 490 flow [2024-06-14 11:20:47,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 453 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:20:47,711 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 340 flow [2024-06-14 11:20:47,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=340, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2024-06-14 11:20:47,711 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 31 predicate places. [2024-06-14 11:20:47,712 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 340 flow [2024-06-14 11:20:47,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:47,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:47,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:47,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:20:47,712 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:47,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:47,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1045324091, now seen corresponding path program 2 times [2024-06-14 11:20:47,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:47,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713104911] [2024-06-14 11:20:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:47,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:47,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:47,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713104911] [2024-06-14 11:20:47,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713104911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:47,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:47,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:20:47,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113100284] [2024-06-14 11:20:47,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:47,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:20:47,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:47,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:20:47,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:20:47,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:47,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:47,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:47,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:47,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:47,861 INFO L124 PetriNetUnfolderBase]: 111/238 cut-off events. [2024-06-14 11:20:47,861 INFO L125 PetriNetUnfolderBase]: For 1052/1054 co-relation queries the response was YES. [2024-06-14 11:20:47,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 238 events. 111/238 cut-off events. For 1052/1054 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 916 event pairs, 30 based on Foata normal form. 3/240 useless extension candidates. Maximal degree in co-relation 931. Up to 147 conditions per place. [2024-06-14 11:20:47,863 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 39 selfloop transitions, 18 changer transitions 0/61 dead transitions. [2024-06-14 11:20:47,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 61 transitions, 514 flow [2024-06-14 11:20:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:20:47,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:20:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-14 11:20:47,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-06-14 11:20:47,864 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 340 flow. Second operand 5 states and 89 transitions. [2024-06-14 11:20:47,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 61 transitions, 514 flow [2024-06-14 11:20:47,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 61 transitions, 446 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:47,867 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 332 flow [2024-06-14 11:20:47,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-06-14 11:20:47,868 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2024-06-14 11:20:47,868 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 332 flow [2024-06-14 11:20:47,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:47,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:47,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:47,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:20:47,869 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:47,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:47,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1045329671, now seen corresponding path program 3 times [2024-06-14 11:20:47,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:47,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809725300] [2024-06-14 11:20:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:47,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:47,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:47,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809725300] [2024-06-14 11:20:47,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809725300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:47,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:47,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:20:47,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427259664] [2024-06-14 11:20:47,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:47,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:20:47,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:47,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:20:47,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:20:47,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:47,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:47,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:47,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:47,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:48,018 INFO L124 PetriNetUnfolderBase]: 109/235 cut-off events. [2024-06-14 11:20:48,019 INFO L125 PetriNetUnfolderBase]: For 1025/1027 co-relation queries the response was YES. [2024-06-14 11:20:48,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 235 events. 109/235 cut-off events. For 1025/1027 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 908 event pairs, 28 based on Foata normal form. 3/237 useless extension candidates. Maximal degree in co-relation 897. Up to 145 conditions per place. [2024-06-14 11:20:48,020 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 36 selfloop transitions, 22 changer transitions 0/62 dead transitions. [2024-06-14 11:20:48,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 62 transitions, 474 flow [2024-06-14 11:20:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:48,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:48,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 11:20:48,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 11:20:48,021 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 332 flow. Second operand 7 states and 115 transitions. [2024-06-14 11:20:48,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 62 transitions, 474 flow [2024-06-14 11:20:48,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 62 transitions, 451 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 11:20:48,026 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 358 flow [2024-06-14 11:20:48,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=358, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2024-06-14 11:20:48,027 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2024-06-14 11:20:48,027 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 358 flow [2024-06-14 11:20:48,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:48,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:48,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:48,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:20:48,028 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:48,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:48,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1489836338, now seen corresponding path program 1 times [2024-06-14 11:20:48,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:48,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109826954] [2024-06-14 11:20:48,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:48,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:48,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:48,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109826954] [2024-06-14 11:20:48,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109826954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:48,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:48,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:48,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777991773] [2024-06-14 11:20:48,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:48,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:48,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:48,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:48,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:48,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:48,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 358 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:48,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:48,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:48,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:48,211 INFO L124 PetriNetUnfolderBase]: 135/285 cut-off events. [2024-06-14 11:20:48,211 INFO L125 PetriNetUnfolderBase]: For 1769/1769 co-relation queries the response was YES. [2024-06-14 11:20:48,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1194 conditions, 285 events. 135/285 cut-off events. For 1769/1769 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1154 event pairs, 25 based on Foata normal form. 2/283 useless extension candidates. Maximal degree in co-relation 1162. Up to 104 conditions per place. [2024-06-14 11:20:48,213 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 40 selfloop transitions, 28 changer transitions 0/72 dead transitions. [2024-06-14 11:20:48,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 72 transitions, 578 flow [2024-06-14 11:20:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 11:20:48,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-14 11:20:48,215 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 358 flow. Second operand 7 states and 123 transitions. [2024-06-14 11:20:48,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 72 transitions, 578 flow [2024-06-14 11:20:48,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 72 transitions, 517 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:48,219 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 365 flow [2024-06-14 11:20:48,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=365, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2024-06-14 11:20:48,220 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2024-06-14 11:20:48,220 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 365 flow [2024-06-14 11:20:48,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:48,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:48,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:48,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:20:48,221 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:48,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:48,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1003032208, now seen corresponding path program 2 times [2024-06-14 11:20:48,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:48,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321535356] [2024-06-14 11:20:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:48,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:48,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:48,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321535356] [2024-06-14 11:20:48,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321535356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:48,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:48,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:48,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907226980] [2024-06-14 11:20:48,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:48,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:48,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:48,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:48,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:48,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:48,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 365 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:48,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:48,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:48,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:48,422 INFO L124 PetriNetUnfolderBase]: 139/293 cut-off events. [2024-06-14 11:20:48,422 INFO L125 PetriNetUnfolderBase]: For 2015/2015 co-relation queries the response was YES. [2024-06-14 11:20:48,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1257 conditions, 293 events. 139/293 cut-off events. For 2015/2015 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1210 event pairs, 36 based on Foata normal form. 2/291 useless extension candidates. Maximal degree in co-relation 1224. Up to 195 conditions per place. [2024-06-14 11:20:48,424 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 37 selfloop transitions, 27 changer transitions 0/68 dead transitions. [2024-06-14 11:20:48,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 68 transitions, 539 flow [2024-06-14 11:20:48,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:48,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:48,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 11:20:48,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:20:48,425 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 365 flow. Second operand 7 states and 120 transitions. [2024-06-14 11:20:48,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 68 transitions, 539 flow [2024-06-14 11:20:48,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 485 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:20:48,434 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 381 flow [2024-06-14 11:20:48,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=381, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2024-06-14 11:20:48,435 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2024-06-14 11:20:48,435 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 381 flow [2024-06-14 11:20:48,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:48,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:48,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:48,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:20:48,436 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:48,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:48,437 INFO L85 PathProgramCache]: Analyzing trace with hash -417405786, now seen corresponding path program 3 times [2024-06-14 11:20:48,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:48,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836453319] [2024-06-14 11:20:48,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:48,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:48,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:48,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836453319] [2024-06-14 11:20:48,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836453319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:48,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:48,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:48,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200040265] [2024-06-14 11:20:48,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:48,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:48,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:48,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:48,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:48,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:48,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 381 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:48,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:48,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:48,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:48,645 INFO L124 PetriNetUnfolderBase]: 143/303 cut-off events. [2024-06-14 11:20:48,645 INFO L125 PetriNetUnfolderBase]: For 2370/2370 co-relation queries the response was YES. [2024-06-14 11:20:48,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1317 conditions, 303 events. 143/303 cut-off events. For 2370/2370 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1261 event pairs, 33 based on Foata normal form. 2/303 useless extension candidates. Maximal degree in co-relation 1283. Up to 232 conditions per place. [2024-06-14 11:20:48,647 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 46 selfloop transitions, 16 changer transitions 0/66 dead transitions. [2024-06-14 11:20:48,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 544 flow [2024-06-14 11:20:48,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:48,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 11:20:48,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-14 11:20:48,649 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 381 flow. Second operand 7 states and 114 transitions. [2024-06-14 11:20:48,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 544 flow [2024-06-14 11:20:48,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 486 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 11:20:48,653 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 372 flow [2024-06-14 11:20:48,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=372, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2024-06-14 11:20:48,655 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2024-06-14 11:20:48,655 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 372 flow [2024-06-14 11:20:48,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:48,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:48,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:48,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:20:48,656 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:48,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:48,657 INFO L85 PathProgramCache]: Analyzing trace with hash 858660212, now seen corresponding path program 4 times [2024-06-14 11:20:48,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:48,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555083438] [2024-06-14 11:20:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:48,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:48,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:48,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555083438] [2024-06-14 11:20:48,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555083438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:48,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:48,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:48,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211349310] [2024-06-14 11:20:48,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:48,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:48,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:48,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:48,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:48,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:48,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 372 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:48,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:48,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:48,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:48,858 INFO L124 PetriNetUnfolderBase]: 130/280 cut-off events. [2024-06-14 11:20:48,859 INFO L125 PetriNetUnfolderBase]: For 2413/2413 co-relation queries the response was YES. [2024-06-14 11:20:48,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1107 conditions, 280 events. 130/280 cut-off events. For 2413/2413 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1151 event pairs, 13 based on Foata normal form. 10/288 useless extension candidates. Maximal degree in co-relation 1072. Up to 130 conditions per place. [2024-06-14 11:20:48,860 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 39 selfloop transitions, 25 changer transitions 4/72 dead transitions. [2024-06-14 11:20:48,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 558 flow [2024-06-14 11:20:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:48,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:48,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 11:20:48,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-14 11:20:48,861 INFO L175 Difference]: Start difference. First operand has 69 places, 54 transitions, 372 flow. Second operand 7 states and 122 transitions. [2024-06-14 11:20:48,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 558 flow [2024-06-14 11:20:48,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 72 transitions, 516 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:20:48,867 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 382 flow [2024-06-14 11:20:48,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=382, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2024-06-14 11:20:48,869 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 42 predicate places. [2024-06-14 11:20:48,869 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 382 flow [2024-06-14 11:20:48,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:48,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:48,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:48,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:20:48,869 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:48,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:48,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1481603320, now seen corresponding path program 1 times [2024-06-14 11:20:48,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:48,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568673769] [2024-06-14 11:20:48,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:48,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:48,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:48,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568673769] [2024-06-14 11:20:48,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568673769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:48,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:48,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:20:48,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507757439] [2024-06-14 11:20:48,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:48,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:20:48,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:48,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:20:48,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:20:48,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:48,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 382 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:48,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:48,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:48,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:49,036 INFO L124 PetriNetUnfolderBase]: 128/278 cut-off events. [2024-06-14 11:20:49,036 INFO L125 PetriNetUnfolderBase]: For 1826/1826 co-relation queries the response was YES. [2024-06-14 11:20:49,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1125 conditions, 278 events. 128/278 cut-off events. For 1826/1826 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1141 event pairs, 26 based on Foata normal form. 2/278 useless extension candidates. Maximal degree in co-relation 1089. Up to 210 conditions per place. [2024-06-14 11:20:49,038 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 47 selfloop transitions, 13 changer transitions 0/64 dead transitions. [2024-06-14 11:20:49,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 64 transitions, 532 flow [2024-06-14 11:20:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:20:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:20:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-14 11:20:49,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2024-06-14 11:20:49,039 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 382 flow. Second operand 5 states and 88 transitions. [2024-06-14 11:20:49,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 64 transitions, 532 flow [2024-06-14 11:20:49,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 64 transitions, 472 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:49,043 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 360 flow [2024-06-14 11:20:49,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=360, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2024-06-14 11:20:49,044 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2024-06-14 11:20:49,044 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 360 flow [2024-06-14 11:20:49,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:49,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:49,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:49,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:20:49,044 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:49,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:49,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1481306650, now seen corresponding path program 2 times [2024-06-14 11:20:49,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:49,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526643948] [2024-06-14 11:20:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:49,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:49,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:49,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526643948] [2024-06-14 11:20:49,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526643948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:49,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:49,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:20:49,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381424398] [2024-06-14 11:20:49,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:49,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:20:49,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:49,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:20:49,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:20:49,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:49,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 360 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:49,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:49,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:49,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:49,203 INFO L124 PetriNetUnfolderBase]: 125/275 cut-off events. [2024-06-14 11:20:49,203 INFO L125 PetriNetUnfolderBase]: For 1414/1416 co-relation queries the response was YES. [2024-06-14 11:20:49,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1040 conditions, 275 events. 125/275 cut-off events. For 1414/1416 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1146 event pairs, 30 based on Foata normal form. 4/278 useless extension candidates. Maximal degree in co-relation 1004. Up to 185 conditions per place. [2024-06-14 11:20:49,205 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 47 selfloop transitions, 11 changer transitions 0/62 dead transitions. [2024-06-14 11:20:49,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 62 transitions, 494 flow [2024-06-14 11:20:49,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:20:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:20:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-14 11:20:49,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2024-06-14 11:20:49,206 INFO L175 Difference]: Start difference. First operand has 69 places, 54 transitions, 360 flow. Second operand 5 states and 82 transitions. [2024-06-14 11:20:49,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 62 transitions, 494 flow [2024-06-14 11:20:49,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 62 transitions, 466 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 11:20:49,210 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 358 flow [2024-06-14 11:20:49,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=358, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2024-06-14 11:20:49,211 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 42 predicate places. [2024-06-14 11:20:49,211 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 358 flow [2024-06-14 11:20:49,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:49,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:49,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:49,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:20:49,212 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:49,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:49,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1059714524, now seen corresponding path program 1 times [2024-06-14 11:20:49,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:49,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143682647] [2024-06-14 11:20:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:49,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:49,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143682647] [2024-06-14 11:20:49,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143682647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:49,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:49,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:49,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611043979] [2024-06-14 11:20:49,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:49,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:49,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:49,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:49,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:49,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:49,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 54 transitions, 358 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:49,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:49,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:49,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:49,378 INFO L124 PetriNetUnfolderBase]: 148/336 cut-off events. [2024-06-14 11:20:49,378 INFO L125 PetriNetUnfolderBase]: For 2711/2713 co-relation queries the response was YES. [2024-06-14 11:20:49,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270 conditions, 336 events. 148/336 cut-off events. For 2711/2713 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1537 event pairs, 43 based on Foata normal form. 8/343 useless extension candidates. Maximal degree in co-relation 1233. Up to 128 conditions per place. [2024-06-14 11:20:49,380 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 41 selfloop transitions, 16 changer transitions 12/73 dead transitions. [2024-06-14 11:20:49,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 73 transitions, 576 flow [2024-06-14 11:20:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 11:20:49,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-14 11:20:49,382 INFO L175 Difference]: Start difference. First operand has 71 places, 54 transitions, 358 flow. Second operand 7 states and 117 transitions. [2024-06-14 11:20:49,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 73 transitions, 576 flow [2024-06-14 11:20:49,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 73 transitions, 550 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 11:20:49,386 INFO L231 Difference]: Finished difference. Result has 75 places, 51 transitions, 345 flow [2024-06-14 11:20:49,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=345, PETRI_PLACES=75, PETRI_TRANSITIONS=51} [2024-06-14 11:20:49,386 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 46 predicate places. [2024-06-14 11:20:49,386 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 51 transitions, 345 flow [2024-06-14 11:20:49,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:49,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:49,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:49,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:20:49,387 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:49,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:49,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1148280284, now seen corresponding path program 2 times [2024-06-14 11:20:49,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:49,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911724735] [2024-06-14 11:20:49,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:49,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:49,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:49,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911724735] [2024-06-14 11:20:49,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911724735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:49,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:49,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:49,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120532636] [2024-06-14 11:20:49,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:49,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:49,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:49,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:49,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:49,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:49,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 51 transitions, 345 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:49,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:49,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:49,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:49,564 INFO L124 PetriNetUnfolderBase]: 154/348 cut-off events. [2024-06-14 11:20:49,565 INFO L125 PetriNetUnfolderBase]: For 4102/4104 co-relation queries the response was YES. [2024-06-14 11:20:49,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 348 events. 154/348 cut-off events. For 4102/4104 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1634 event pairs, 53 based on Foata normal form. 8/355 useless extension candidates. Maximal degree in co-relation 1382. Up to 168 conditions per place. [2024-06-14 11:20:49,567 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 41 selfloop transitions, 16 changer transitions 6/67 dead transitions. [2024-06-14 11:20:49,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 67 transitions, 549 flow [2024-06-14 11:20:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:49,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:49,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 11:20:49,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-06-14 11:20:49,568 INFO L175 Difference]: Start difference. First operand has 75 places, 51 transitions, 345 flow. Second operand 7 states and 116 transitions. [2024-06-14 11:20:49,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 67 transitions, 549 flow [2024-06-14 11:20:49,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 67 transitions, 505 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:49,572 INFO L231 Difference]: Finished difference. Result has 72 places, 49 transitions, 331 flow [2024-06-14 11:20:49,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=331, PETRI_PLACES=72, PETRI_TRANSITIONS=49} [2024-06-14 11:20:49,573 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2024-06-14 11:20:49,573 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 49 transitions, 331 flow [2024-06-14 11:20:49,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:49,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:49,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:49,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:20:49,574 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:49,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:49,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1148428154, now seen corresponding path program 3 times [2024-06-14 11:20:49,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:49,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205483985] [2024-06-14 11:20:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:49,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:49,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:49,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205483985] [2024-06-14 11:20:49,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205483985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:49,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:49,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:49,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683330908] [2024-06-14 11:20:49,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:49,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:49,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:49,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:49,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:49,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:49,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 49 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:49,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:49,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:49,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:49,756 INFO L124 PetriNetUnfolderBase]: 130/296 cut-off events. [2024-06-14 11:20:49,757 INFO L125 PetriNetUnfolderBase]: For 2928/2930 co-relation queries the response was YES. [2024-06-14 11:20:49,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 296 events. 130/296 cut-off events. For 2928/2930 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1308 event pairs, 45 based on Foata normal form. 10/305 useless extension candidates. Maximal degree in co-relation 1099. Up to 168 conditions per place. [2024-06-14 11:20:49,758 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 30 selfloop transitions, 12 changer transitions 15/61 dead transitions. [2024-06-14 11:20:49,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 61 transitions, 477 flow [2024-06-14 11:20:49,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 11:20:49,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-14 11:20:49,759 INFO L175 Difference]: Start difference. First operand has 72 places, 49 transitions, 331 flow. Second operand 7 states and 111 transitions. [2024-06-14 11:20:49,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 61 transitions, 477 flow [2024-06-14 11:20:49,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 61 transitions, 443 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:49,763 INFO L231 Difference]: Finished difference. Result has 71 places, 44 transitions, 285 flow [2024-06-14 11:20:49,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=285, PETRI_PLACES=71, PETRI_TRANSITIONS=44} [2024-06-14 11:20:49,763 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 42 predicate places. [2024-06-14 11:20:49,763 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 44 transitions, 285 flow [2024-06-14 11:20:49,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:49,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:49,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:49,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:20:49,764 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:49,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:49,764 INFO L85 PathProgramCache]: Analyzing trace with hash -465876870, now seen corresponding path program 4 times [2024-06-14 11:20:49,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:49,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354786659] [2024-06-14 11:20:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:49,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:49,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:49,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354786659] [2024-06-14 11:20:49,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354786659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:49,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:49,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:49,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662608070] [2024-06-14 11:20:49,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:49,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:49,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:49,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:49,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:49,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:49,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 44 transitions, 285 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:49,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:49,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:49,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:49,935 INFO L124 PetriNetUnfolderBase]: 120/274 cut-off events. [2024-06-14 11:20:49,935 INFO L125 PetriNetUnfolderBase]: For 2512/2512 co-relation queries the response was YES. [2024-06-14 11:20:49,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1024 conditions, 274 events. 120/274 cut-off events. For 2512/2512 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1195 event pairs, 47 based on Foata normal form. 8/281 useless extension candidates. Maximal degree in co-relation 989. Up to 164 conditions per place. [2024-06-14 11:20:49,937 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 28 selfloop transitions, 10 changer transitions 10/52 dead transitions. [2024-06-14 11:20:49,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 52 transitions, 403 flow [2024-06-14 11:20:49,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:49,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-14 11:20:49,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-14 11:20:49,938 INFO L175 Difference]: Start difference. First operand has 71 places, 44 transitions, 285 flow. Second operand 6 states and 95 transitions. [2024-06-14 11:20:49,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 52 transitions, 403 flow [2024-06-14 11:20:49,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 371 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:49,941 INFO L231 Difference]: Finished difference. Result has 64 places, 40 transitions, 247 flow [2024-06-14 11:20:49,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=247, PETRI_PLACES=64, PETRI_TRANSITIONS=40} [2024-06-14 11:20:49,941 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2024-06-14 11:20:49,942 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 40 transitions, 247 flow [2024-06-14 11:20:49,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:49,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:49,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:49,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:20:49,942 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:49,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:49,943 INFO L85 PathProgramCache]: Analyzing trace with hash -460299288, now seen corresponding path program 1 times [2024-06-14 11:20:49,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:49,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653343160] [2024-06-14 11:20:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:49,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:50,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:50,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653343160] [2024-06-14 11:20:50,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653343160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:50,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:50,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:50,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187450850] [2024-06-14 11:20:50,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:50,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:50,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:50,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:50,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:50,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:50,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 40 transitions, 247 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:50,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:50,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:50,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:50,120 INFO L124 PetriNetUnfolderBase]: 124/290 cut-off events. [2024-06-14 11:20:50,121 INFO L125 PetriNetUnfolderBase]: For 2170/2170 co-relation queries the response was YES. [2024-06-14 11:20:50,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 290 events. 124/290 cut-off events. For 2170/2170 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1313 event pairs, 50 based on Foata normal form. 6/295 useless extension candidates. Maximal degree in co-relation 1035. Up to 131 conditions per place. [2024-06-14 11:20:50,122 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 30 selfloop transitions, 15 changer transitions 5/54 dead transitions. [2024-06-14 11:20:50,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 54 transitions, 409 flow [2024-06-14 11:20:50,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:50,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 11:20:50,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-14 11:20:50,123 INFO L175 Difference]: Start difference. First operand has 64 places, 40 transitions, 247 flow. Second operand 8 states and 123 transitions. [2024-06-14 11:20:50,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 54 transitions, 409 flow [2024-06-14 11:20:50,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 54 transitions, 381 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:20:50,126 INFO L231 Difference]: Finished difference. Result has 64 places, 39 transitions, 251 flow [2024-06-14 11:20:50,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=251, PETRI_PLACES=64, PETRI_TRANSITIONS=39} [2024-06-14 11:20:50,126 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2024-06-14 11:20:50,126 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 39 transitions, 251 flow [2024-06-14 11:20:50,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:50,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:50,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:50,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:20:50,127 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:50,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash -460508538, now seen corresponding path program 2 times [2024-06-14 11:20:50,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:50,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536886350] [2024-06-14 11:20:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:50,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:50,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:50,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536886350] [2024-06-14 11:20:50,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536886350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:50,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:50,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:50,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701103171] [2024-06-14 11:20:50,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:50,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:50,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:50,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:50,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:50,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:50,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 39 transitions, 251 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:50,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:50,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:50,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:50,295 INFO L124 PetriNetUnfolderBase]: 102/244 cut-off events. [2024-06-14 11:20:50,296 INFO L125 PetriNetUnfolderBase]: For 1508/1508 co-relation queries the response was YES. [2024-06-14 11:20:50,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 244 events. 102/244 cut-off events. For 1508/1508 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1027 event pairs, 44 based on Foata normal form. 8/251 useless extension candidates. Maximal degree in co-relation 833. Up to 143 conditions per place. [2024-06-14 11:20:50,297 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 24 selfloop transitions, 9 changer transitions 11/48 dead transitions. [2024-06-14 11:20:50,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 48 transitions, 363 flow [2024-06-14 11:20:50,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-14 11:20:50,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5095238095238095 [2024-06-14 11:20:50,298 INFO L175 Difference]: Start difference. First operand has 64 places, 39 transitions, 251 flow. Second operand 7 states and 107 transitions. [2024-06-14 11:20:50,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 48 transitions, 363 flow [2024-06-14 11:20:50,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 48 transitions, 331 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:50,318 INFO L231 Difference]: Finished difference. Result has 63 places, 34 transitions, 209 flow [2024-06-14 11:20:50,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=209, PETRI_PLACES=63, PETRI_TRANSITIONS=34} [2024-06-14 11:20:50,318 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2024-06-14 11:20:50,318 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 34 transitions, 209 flow [2024-06-14 11:20:50,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:50,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:50,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:50,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:20:50,319 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:50,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:50,319 INFO L85 PathProgramCache]: Analyzing trace with hash -466024740, now seen corresponding path program 5 times [2024-06-14 11:20:50,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:50,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442862731] [2024-06-14 11:20:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:50,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:50,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:50,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442862731] [2024-06-14 11:20:50,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442862731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:50,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:50,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:50,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24251078] [2024-06-14 11:20:50,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:50,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:50,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:50,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:50,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:50,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:50,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 34 transitions, 209 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:50,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:50,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:50,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:50,467 INFO L124 PetriNetUnfolderBase]: 73/183 cut-off events. [2024-06-14 11:20:50,467 INFO L125 PetriNetUnfolderBase]: For 962/962 co-relation queries the response was YES. [2024-06-14 11:20:50,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 183 events. 73/183 cut-off events. For 962/962 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 668 event pairs, 28 based on Foata normal form. 6/188 useless extension candidates. Maximal degree in co-relation 587. Up to 62 conditions per place. [2024-06-14 11:20:50,468 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 18 selfloop transitions, 3 changer transitions 18/43 dead transitions. [2024-06-14 11:20:50,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 43 transitions, 307 flow [2024-06-14 11:20:50,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:50,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-14 11:20:50,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-14 11:20:50,469 INFO L175 Difference]: Start difference. First operand has 63 places, 34 transitions, 209 flow. Second operand 6 states and 92 transitions. [2024-06-14 11:20:50,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 43 transitions, 307 flow [2024-06-14 11:20:50,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 43 transitions, 277 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:50,471 INFO L231 Difference]: Finished difference. Result has 59 places, 24 transitions, 111 flow [2024-06-14 11:20:50,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=111, PETRI_PLACES=59, PETRI_TRANSITIONS=24} [2024-06-14 11:20:50,471 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2024-06-14 11:20:50,471 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 24 transitions, 111 flow [2024-06-14 11:20:50,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:50,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:50,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:50,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:20:50,472 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:50,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:50,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1058437386, now seen corresponding path program 3 times [2024-06-14 11:20:50,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:50,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206844478] [2024-06-14 11:20:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:50,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:50,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:50,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206844478] [2024-06-14 11:20:50,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206844478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:50,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:50,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:50,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987061251] [2024-06-14 11:20:50,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:50,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:50,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:50,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:50,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:50,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:50,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 24 transitions, 111 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:50,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:50,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:50,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:50,647 INFO L124 PetriNetUnfolderBase]: 42/110 cut-off events. [2024-06-14 11:20:50,647 INFO L125 PetriNetUnfolderBase]: For 640/640 co-relation queries the response was YES. [2024-06-14 11:20:50,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 110 events. 42/110 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 310 event pairs, 17 based on Foata normal form. 6/116 useless extension candidates. Maximal degree in co-relation 331. Up to 52 conditions per place. [2024-06-14 11:20:50,648 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 16 selfloop transitions, 2 changer transitions 10/32 dead transitions. [2024-06-14 11:20:50,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 32 transitions, 187 flow [2024-06-14 11:20:50,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:50,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:50,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-06-14 11:20:50,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-06-14 11:20:50,649 INFO L175 Difference]: Start difference. First operand has 59 places, 24 transitions, 111 flow. Second operand 6 states and 89 transitions. [2024-06-14 11:20:50,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 32 transitions, 187 flow [2024-06-14 11:20:50,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 32 transitions, 162 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:50,650 INFO L231 Difference]: Finished difference. Result has 46 places, 21 transitions, 80 flow [2024-06-14 11:20:50,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=80, PETRI_PLACES=46, PETRI_TRANSITIONS=21} [2024-06-14 11:20:50,651 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2024-06-14 11:20:50,651 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 21 transitions, 80 flow [2024-06-14 11:20:50,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:50,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:50,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:50,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:20:50,651 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:20:50,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:50,652 INFO L85 PathProgramCache]: Analyzing trace with hash -932236864, now seen corresponding path program 4 times [2024-06-14 11:20:50,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:50,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565186197] [2024-06-14 11:20:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:50,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:50,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:50,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565186197] [2024-06-14 11:20:50,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565186197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:50,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:50,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:50,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387718603] [2024-06-14 11:20:50,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:50,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:50,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:50,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:50,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:50,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-14 11:20:50,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 21 transitions, 80 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:50,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:50,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-14 11:20:50,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:50,794 INFO L124 PetriNetUnfolderBase]: 20/60 cut-off events. [2024-06-14 11:20:50,794 INFO L125 PetriNetUnfolderBase]: For 209/209 co-relation queries the response was YES. [2024-06-14 11:20:50,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 60 events. 20/60 cut-off events. For 209/209 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 93 event pairs, 2 based on Foata normal form. 6/66 useless extension candidates. Maximal degree in co-relation 139. Up to 24 conditions per place. [2024-06-14 11:20:50,795 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2024-06-14 11:20:50,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 25 transitions, 114 flow [2024-06-14 11:20:50,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 82 transitions. [2024-06-14 11:20:50,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-14 11:20:50,797 INFO L175 Difference]: Start difference. First operand has 46 places, 21 transitions, 80 flow. Second operand 6 states and 82 transitions. [2024-06-14 11:20:50,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 25 transitions, 114 flow [2024-06-14 11:20:50,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 25 transitions, 98 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 11:20:50,797 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2024-06-14 11:20:50,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2024-06-14 11:20:50,798 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2024-06-14 11:20:50,798 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2024-06-14 11:20:50,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:50,800 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-14 11:20:50,801 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-14 11:20:50,801 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-14 11:20:50,801 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-14 11:20:50,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:20:50,801 INFO L445 BasicCegarLoop]: Path program histogram: [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:50,804 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-14 11:20:50,804 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-14 11:20:50,806 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-14 11:20:50,807 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-14 11:20:50,807 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.06 11:20:50 BasicIcfg [2024-06-14 11:20:50,807 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-14 11:20:50,808 INFO L158 Benchmark]: Toolchain (without parser) took 6573.04ms. Allocated memory was 167.8MB in the beginning and 308.3MB in the end (delta: 140.5MB). Free memory was 89.8MB in the beginning and 140.0MB in the end (delta: -50.2MB). Peak memory consumption was 91.5MB. Max. memory is 16.1GB. [2024-06-14 11:20:50,808 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 167.8MB. Free memory is still 122.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 11:20:50,808 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 167.8MB. Free memory is still 92.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 11:20:50,808 INFO L158 Benchmark]: CACSL2BoogieTranslator took 449.95ms. Allocated memory is still 167.8MB. Free memory was 89.6MB in the beginning and 121.6MB in the end (delta: -32.1MB). Peak memory consumption was 15.5MB. Max. memory is 16.1GB. [2024-06-14 11:20:50,808 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.98ms. Allocated memory is still 167.8MB. Free memory was 121.6MB in the beginning and 119.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-14 11:20:50,809 INFO L158 Benchmark]: Boogie Preprocessor took 32.56ms. Allocated memory is still 167.8MB. Free memory was 119.6MB in the beginning and 117.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-14 11:20:50,809 INFO L158 Benchmark]: RCFGBuilder took 456.21ms. Allocated memory is still 167.8MB. Free memory was 117.5MB in the beginning and 96.5MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-06-14 11:20:50,809 INFO L158 Benchmark]: TraceAbstraction took 5573.49ms. Allocated memory was 167.8MB in the beginning and 308.3MB in the end (delta: 140.5MB). Free memory was 95.4MB in the beginning and 140.0MB in the end (delta: -44.6MB). Peak memory consumption was 97.0MB. Max. memory is 16.1GB. [2024-06-14 11:20:50,810 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 167.8MB. Free memory is still 122.3MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.16ms. Allocated memory is still 167.8MB. Free memory is still 92.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 449.95ms. Allocated memory is still 167.8MB. Free memory was 89.6MB in the beginning and 121.6MB in the end (delta: -32.1MB). Peak memory consumption was 15.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.98ms. Allocated memory is still 167.8MB. Free memory was 121.6MB in the beginning and 119.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.56ms. Allocated memory is still 167.8MB. Free memory was 119.6MB in the beginning and 117.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 456.21ms. Allocated memory is still 167.8MB. Free memory was 117.5MB in the beginning and 96.5MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 5573.49ms. Allocated memory was 167.8MB in the beginning and 308.3MB in the end (delta: 140.5MB). Free memory was 95.4MB in the beginning and 140.0MB in the end (delta: -44.6MB). Peak memory consumption was 97.0MB. 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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 47 locations, 4 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: 5.5s, OverallIterations: 27, TraceHistogramMax: 1, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1191 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 860 mSDsluCounter, 373 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 237 mSDsCounter, 133 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3584 IncrementalHoareTripleChecker+Invalid, 3717 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 133 mSolverCounterUnsat, 136 mSDtfsCounter, 3584 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 132 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=382occurred in iteration=16, InterpolantAutomatonStates: 161, 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, 2.2s InterpolantComputationTime, 396 NumberOfCodeBlocks, 396 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 369 ConstructedInterpolants, 0 QuantifiedInterpolants, 2799 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 27 InterpolantComputations, 27 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 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-14 11:20:50,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE