./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c --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/array-eq-trans.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/weaver/array-eq-trans.wvr.c ./goblint.2024-05-21_14-57-05.files/protection/array-eq-trans.wvr.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-bcb38a6-m [2024-06-03 19:00:59,946 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:01:00,033 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:01:00,040 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:01:00,041 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:01:00,063 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:01:00,066 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:01:00,066 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:01:00,066 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:01:00,070 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:01:00,070 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:01:00,070 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:01:00,071 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:01:00,072 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:01:00,072 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:01:00,072 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:01:00,073 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:01:00,073 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:01:00,073 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:01:00,073 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:01:00,074 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:01:00,075 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:01:00,075 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:01:00,075 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:01:00,075 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:01:00,075 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:01:00,076 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:01:00,076 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:01:00,076 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:01:00,077 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:01:00,077 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:01:00,077 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:01:00,078 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:01:00,078 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:01:00,078 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:01:00,078 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:01:00,078 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:01:00,079 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:01:00,079 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:01:00,079 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:01:00,079 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:01:00,079 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:01:00,080 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:01:00,080 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:01:00,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:01:00,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:01:00,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:01:00,273 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:01:00,273 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:01:00,274 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2024-06-03 19:01:01,327 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:01:01,505 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:01:01,506 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2024-06-03 19:01:01,514 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef50205fb/207ca29870364e2abc7890da493bf476/FLAG9d8a9fac9 [2024-06-03 19:01:01,527 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef50205fb/207ca29870364e2abc7890da493bf476 [2024-06-03 19:01:01,529 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:01:01,530 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:01:01,532 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/array-eq-trans.wvr.yml/witness.yml [2024-06-03 19:01:01,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:01:01,616 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:01:01,619 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:01:01,619 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:01:01,623 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:01:01,624 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:01:01" (1/2) ... [2024-06-03 19:01:01,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d44d054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:01:01, skipping insertion in model container [2024-06-03 19:01:01,625 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:01:01" (1/2) ... [2024-06-03 19:01:01,626 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@74be4044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:01:01, skipping insertion in model container [2024-06-03 19:01:01,626 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:01:01" (2/2) ... [2024-06-03 19:01:01,627 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d44d054 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:01:01, skipping insertion in model container [2024-06-03 19:01:01,627 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:01:01" (2/2) ... [2024-06-03 19:01:01,627 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:01:01,648 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:01:01,649 INFO L97 edCorrectnessWitness]: Location invariant before [L93-L93] ((! multithreaded || 0 <= i_AC) && (! multithreaded || 0 <= i_BC)) && (! multithreaded || 0 <= i_AB) [2024-06-03 19:01:01,649 INFO L97 edCorrectnessWitness]: Location invariant before [L95-L95] ((! multithreaded || 0 <= i_AC) && (! multithreaded || 0 <= i_BC)) && (! multithreaded || 0 <= i_AB) [2024-06-03 19:01:01,649 INFO L97 edCorrectnessWitness]: Location invariant before [L94-L94] ((! multithreaded || 0 <= i_AC) && (! multithreaded || 0 <= i_BC)) && (! multithreaded || 0 <= i_AB) [2024-06-03 19:01:01,649 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:01:01,649 INFO L106 edCorrectnessWitness]: ghost_update [L92-L92] multithreaded = 1; [2024-06-03 19:01:01,666 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:01:01,844 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:01:01,851 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:01:01,905 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:01:01,928 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:01:01,929 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:01:01 WrapperNode [2024-06-03 19:01:01,929 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:01:01,930 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:01:01,930 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:01:01,930 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:01:01,935 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 03.06 07:01:01" (1/1) ... [2024-06-03 19:01:01,941 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 03.06 07:01:01" (1/1) ... [2024-06-03 19:01:01,974 INFO L138 Inliner]: procedures = 23, calls = 32, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 202 [2024-06-03 19:01:01,975 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:01:01,976 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:01:01,976 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:01:01,976 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:01:01,984 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:01:01" (1/1) ... [2024-06-03 19:01:01,985 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:01:01" (1/1) ... [2024-06-03 19:01:01,993 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:01:01" (1/1) ... [2024-06-03 19:01:02,014 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-06-03 19:01:02,017 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:01:01" (1/1) ... [2024-06-03 19:01:02,017 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:01:01" (1/1) ... [2024-06-03 19:01:02,029 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:01:01" (1/1) ... [2024-06-03 19:01:02,042 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:01:01" (1/1) ... [2024-06-03 19:01:02,044 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:01:01" (1/1) ... [2024-06-03 19:01:02,045 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:01:01" (1/1) ... [2024-06-03 19:01:02,046 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:01:02,051 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:01:02,051 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:01:02,051 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:01:02,052 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:01:01" (1/1) ... [2024-06-03 19:01:02,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:01:02,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:01:02,106 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) [2024-06-03 19:01:02,114 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 [2024-06-03 19:01:02,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:01:02,142 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-03 19:01:02,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-03 19:01:02,142 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-03 19:01:02,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-03 19:01:02,143 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-03 19:01:02,143 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-03 19:01:02,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:01:02,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-03 19:01:02,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-03 19:01:02,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-03 19:01:02,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-03 19:01:02,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:01:02,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:01:02,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-03 19:01:02,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-03 19:01:02,147 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:01:02,250 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:01:02,252 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:01:02,616 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:01:02,617 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:01:02,827 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:01:02,828 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-06-03 19:01:02,828 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:01:02 BoogieIcfgContainer [2024-06-03 19:01:02,828 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:01:02,830 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:01:02,830 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:01:02,833 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:01:02,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:01:01" (1/4) ... [2024-06-03 19:01:02,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1829f3f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:01:02, skipping insertion in model container [2024-06-03 19:01:02,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:01:01" (2/4) ... [2024-06-03 19:01:02,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1829f3f3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:01:02, skipping insertion in model container [2024-06-03 19:01:02,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:01:01" (3/4) ... [2024-06-03 19:01:02,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1829f3f3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:01:02, skipping insertion in model container [2024-06-03 19:01:02,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:01:02" (4/4) ... [2024-06-03 19:01:02,836 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2024-06-03 19:01:02,849 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:01:02,849 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:01:02,849 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:01:02,885 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-03 19:01:02,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 43 transitions, 107 flow [2024-06-03 19:01:02,943 INFO L124 PetriNetUnfolderBase]: 9/40 cut-off events. [2024-06-03 19:01:02,944 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-03 19:01:02,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 40 events. 9/40 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 31 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-06-03 19:01:02,947 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 43 transitions, 107 flow [2024-06-03 19:01:02,949 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 91 flow [2024-06-03 19:01:02,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:01:02,970 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;@7197e994, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:01:02,970 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:01:02,980 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:01:02,980 INFO L124 PetriNetUnfolderBase]: 5/16 cut-off events. [2024-06-03 19:01:02,980 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:01:02,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:02,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:02,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:02,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:02,985 INFO L85 PathProgramCache]: Analyzing trace with hash 743603262, now seen corresponding path program 1 times [2024-06-03 19:01:02,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:02,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894980766] [2024-06-03 19:01:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:02,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:01:03,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:03,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894980766] [2024-06-03 19:01:03,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894980766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:03,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:03,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:01:03,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576062401] [2024-06-03 19:01:03,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:03,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:01:03,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:03,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:01:03,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:01:03,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 43 [2024-06-03 19:01:03,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:03,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:03,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 43 [2024-06-03 19:01:03,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:03,581 INFO L124 PetriNetUnfolderBase]: 1481/2035 cut-off events. [2024-06-03 19:01:03,581 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2024-06-03 19:01:03,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4149 conditions, 2035 events. 1481/2035 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7570 event pairs, 396 based on Foata normal form. 64/1430 useless extension candidates. Maximal degree in co-relation 3822. Up to 1306 conditions per place. [2024-06-03 19:01:03,593 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 53 selfloop transitions, 4 changer transitions 4/62 dead transitions. [2024-06-03 19:01:03,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 62 transitions, 273 flow [2024-06-03 19:01:03,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:01:03,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:01:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-03 19:01:03,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-06-03 19:01:03,604 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 91 flow. Second operand 3 states and 76 transitions. [2024-06-03 19:01:03,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 62 transitions, 273 flow [2024-06-03 19:01:03,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 62 transitions, 257 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 19:01:03,612 INFO L231 Difference]: Finished difference. Result has 37 places, 39 transitions, 106 flow [2024-06-03 19:01:03,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=37, PETRI_TRANSITIONS=39} [2024-06-03 19:01:03,615 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2024-06-03 19:01:03,616 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 39 transitions, 106 flow [2024-06-03 19:01:03,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:03,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:03,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:03,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:01:03,617 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:03,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:03,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1638225820, now seen corresponding path program 1 times [2024-06-03 19:01:03,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:03,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831592362] [2024-06-03 19:01:03,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:03,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:01:03,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:03,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831592362] [2024-06-03 19:01:03,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831592362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:03,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:03,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:01:03,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394189798] [2024-06-03 19:01:03,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:03,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:01:03,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:03,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:01:03,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:01:03,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 43 [2024-06-03 19:01:03,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 39 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:03,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:03,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 43 [2024-06-03 19:01:03,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:03,931 INFO L124 PetriNetUnfolderBase]: 1922/2608 cut-off events. [2024-06-03 19:01:03,932 INFO L125 PetriNetUnfolderBase]: For 335/335 co-relation queries the response was YES. [2024-06-03 19:01:03,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5903 conditions, 2608 events. 1922/2608 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10062 event pairs, 366 based on Foata normal form. 84/2267 useless extension candidates. Maximal degree in co-relation 1335. Up to 1225 conditions per place. [2024-06-03 19:01:03,942 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 69 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2024-06-03 19:01:03,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 76 transitions, 339 flow [2024-06-03 19:01:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:01:03,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:01:03,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-03 19:01:03,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2024-06-03 19:01:03,944 INFO L175 Difference]: Start difference. First operand has 37 places, 39 transitions, 106 flow. Second operand 4 states and 94 transitions. [2024-06-03 19:01:03,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 76 transitions, 339 flow [2024-06-03 19:01:03,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 76 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:01:03,946 INFO L231 Difference]: Finished difference. Result has 37 places, 40 transitions, 129 flow [2024-06-03 19:01:03,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=37, PETRI_TRANSITIONS=40} [2024-06-03 19:01:03,947 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2024-06-03 19:01:03,947 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 40 transitions, 129 flow [2024-06-03 19:01:03,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:03,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:03,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:03,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:01:03,948 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:03,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:03,949 INFO L85 PathProgramCache]: Analyzing trace with hash -429983636, now seen corresponding path program 1 times [2024-06-03 19:01:03,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:03,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379236210] [2024-06-03 19:01:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:03,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:04,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:01:04,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:04,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379236210] [2024-06-03 19:01:04,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379236210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:04,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:04,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:01:04,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206236913] [2024-06-03 19:01:04,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:04,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:01:04,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:04,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:01:04,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:01:04,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 43 [2024-06-03 19:01:04,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 40 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:04,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:04,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 43 [2024-06-03 19:01:04,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:04,340 INFO L124 PetriNetUnfolderBase]: 2458/3320 cut-off events. [2024-06-03 19:01:04,341 INFO L125 PetriNetUnfolderBase]: For 1337/1337 co-relation queries the response was YES. [2024-06-03 19:01:04,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7901 conditions, 3320 events. 2458/3320 cut-off events. For 1337/1337 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 13287 event pairs, 414 based on Foata normal form. 80/2855 useless extension candidates. Maximal degree in co-relation 3983. Up to 1967 conditions per place. [2024-06-03 19:01:04,384 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 71 selfloop transitions, 6 changer transitions 0/78 dead transitions. [2024-06-03 19:01:04,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 78 transitions, 374 flow [2024-06-03 19:01:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:01:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:01:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-03 19:01:04,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5406976744186046 [2024-06-03 19:01:04,394 INFO L175 Difference]: Start difference. First operand has 37 places, 40 transitions, 129 flow. Second operand 4 states and 93 transitions. [2024-06-03 19:01:04,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 78 transitions, 374 flow [2024-06-03 19:01:04,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 78 transitions, 365 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-03 19:01:04,396 INFO L231 Difference]: Finished difference. Result has 39 places, 42 transitions, 153 flow [2024-06-03 19:01:04,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=39, PETRI_TRANSITIONS=42} [2024-06-03 19:01:04,397 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2024-06-03 19:01:04,397 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 42 transitions, 153 flow [2024-06-03 19:01:04,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:04,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:04,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:04,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:01:04,398 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:04,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:04,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1837782176, now seen corresponding path program 1 times [2024-06-03 19:01:04,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:04,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405617811] [2024-06-03 19:01:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:04,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:01:04,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:04,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405617811] [2024-06-03 19:01:04,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405617811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:04,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:04,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:01:04,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683897414] [2024-06-03 19:01:04,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:04,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:01:04,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:04,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:01:04,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:01:04,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-03 19:01:04,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:04,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:04,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-03 19:01:04,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:04,866 INFO L124 PetriNetUnfolderBase]: 3379/4834 cut-off events. [2024-06-03 19:01:04,866 INFO L125 PetriNetUnfolderBase]: For 2538/2626 co-relation queries the response was YES. [2024-06-03 19:01:04,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11620 conditions, 4834 events. 3379/4834 cut-off events. For 2538/2626 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 22661 event pairs, 2060 based on Foata normal form. 0/4106 useless extension candidates. Maximal degree in co-relation 6767. Up to 3164 conditions per place. [2024-06-03 19:01:04,885 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 67 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2024-06-03 19:01:04,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 77 transitions, 401 flow [2024-06-03 19:01:04,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:01:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:01:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-03 19:01:04,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-03 19:01:04,887 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 153 flow. Second operand 5 states and 100 transitions. [2024-06-03 19:01:04,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 77 transitions, 401 flow [2024-06-03 19:01:04,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 77 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-03 19:01:04,891 INFO L231 Difference]: Finished difference. Result has 44 places, 48 transitions, 196 flow [2024-06-03 19:01:04,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=44, PETRI_TRANSITIONS=48} [2024-06-03 19:01:04,892 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2024-06-03 19:01:04,892 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 48 transitions, 196 flow [2024-06-03 19:01:04,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:04,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:04,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:04,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:01:04,893 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:04,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:04,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1496116254, now seen corresponding path program 1 times [2024-06-03 19:01:04,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:04,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267213188] [2024-06-03 19:01:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:04,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-03 19:01:04,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:04,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267213188] [2024-06-03 19:01:04,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267213188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:04,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:04,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:01:04,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670667032] [2024-06-03 19:01:04,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:04,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:01:04,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:04,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:01:04,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:01:04,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-03 19:01:04,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 48 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 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) [2024-06-03 19:01:04,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:04,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-03 19:01:04,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:05,445 INFO L124 PetriNetUnfolderBase]: 5978/8566 cut-off events. [2024-06-03 19:01:05,445 INFO L125 PetriNetUnfolderBase]: For 3907/4111 co-relation queries the response was YES. [2024-06-03 19:01:05,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20599 conditions, 8566 events. 5978/8566 cut-off events. For 3907/4111 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 44385 event pairs, 3136 based on Foata normal form. 135/7710 useless extension candidates. Maximal degree in co-relation 13616. Up to 3491 conditions per place. [2024-06-03 19:01:05,490 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 87 selfloop transitions, 13 changer transitions 0/103 dead transitions. [2024-06-03 19:01:05,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 103 transitions, 571 flow [2024-06-03 19:01:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:01:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:01:05,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-03 19:01:05,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4844961240310077 [2024-06-03 19:01:05,495 INFO L175 Difference]: Start difference. First operand has 44 places, 48 transitions, 196 flow. Second operand 6 states and 125 transitions. [2024-06-03 19:01:05,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 103 transitions, 571 flow [2024-06-03 19:01:05,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 103 transitions, 567 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-03 19:01:05,505 INFO L231 Difference]: Finished difference. Result has 52 places, 55 transitions, 290 flow [2024-06-03 19:01:05,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=290, PETRI_PLACES=52, PETRI_TRANSITIONS=55} [2024-06-03 19:01:05,510 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 13 predicate places. [2024-06-03 19:01:05,511 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 55 transitions, 290 flow [2024-06-03 19:01:05,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 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) [2024-06-03 19:01:05,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:05,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:05,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:01:05,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:05,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:05,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1627721536, now seen corresponding path program 1 times [2024-06-03 19:01:05,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:05,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525805354] [2024-06-03 19:01:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:05,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:01:05,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:05,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525805354] [2024-06-03 19:01:05,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525805354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:05,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:05,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:01:05,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278440174] [2024-06-03 19:01:05,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:05,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:01:05,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:05,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:01:05,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:01:05,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 43 [2024-06-03 19:01:05,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 55 transitions, 290 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:05,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:05,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 43 [2024-06-03 19:01:05,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:06,308 INFO L124 PetriNetUnfolderBase]: 7500/10348 cut-off events. [2024-06-03 19:01:06,309 INFO L125 PetriNetUnfolderBase]: For 6828/6828 co-relation queries the response was YES. [2024-06-03 19:01:06,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26071 conditions, 10348 events. 7500/10348 cut-off events. For 6828/6828 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 50328 event pairs, 1828 based on Foata normal form. 208/9347 useless extension candidates. Maximal degree in co-relation 17116. Up to 6725 conditions per place. [2024-06-03 19:01:06,344 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 83 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2024-06-03 19:01:06,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 90 transitions, 566 flow [2024-06-03 19:01:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:01:06,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:01:06,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-03 19:01:06,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174418604651163 [2024-06-03 19:01:06,346 INFO L175 Difference]: Start difference. First operand has 52 places, 55 transitions, 290 flow. Second operand 4 states and 89 transitions. [2024-06-03 19:01:06,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 90 transitions, 566 flow [2024-06-03 19:01:06,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 90 transitions, 551 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-03 19:01:06,355 INFO L231 Difference]: Finished difference. Result has 55 places, 57 transitions, 311 flow [2024-06-03 19:01:06,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=311, PETRI_PLACES=55, PETRI_TRANSITIONS=57} [2024-06-03 19:01:06,357 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 16 predicate places. [2024-06-03 19:01:06,358 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 57 transitions, 311 flow [2024-06-03 19:01:06,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:06,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:06,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:06,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:01:06,359 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:06,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:06,359 INFO L85 PathProgramCache]: Analyzing trace with hash 897792175, now seen corresponding path program 1 times [2024-06-03 19:01:06,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:06,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722430018] [2024-06-03 19:01:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:06,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-03 19:01:06,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:06,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722430018] [2024-06-03 19:01:06,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722430018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:06,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:06,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:01:06,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826857747] [2024-06-03 19:01:06,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:06,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:01:06,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:06,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:01:06,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:01:06,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-03 19:01:06,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 57 transitions, 311 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:06,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:06,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-03 19:01:06,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:07,301 INFO L124 PetriNetUnfolderBase]: 10058/14380 cut-off events. [2024-06-03 19:01:07,302 INFO L125 PetriNetUnfolderBase]: For 11025/11349 co-relation queries the response was YES. [2024-06-03 19:01:07,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36726 conditions, 14380 events. 10058/14380 cut-off events. For 11025/11349 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 78504 event pairs, 4560 based on Foata normal form. 0/12870 useless extension candidates. Maximal degree in co-relation 25372. Up to 5601 conditions per place. [2024-06-03 19:01:07,361 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 85 selfloop transitions, 13 changer transitions 3/104 dead transitions. [2024-06-03 19:01:07,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 104 transitions, 685 flow [2024-06-03 19:01:07,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:01:07,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:01:07,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-03 19:01:07,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162790697674419 [2024-06-03 19:01:07,362 INFO L175 Difference]: Start difference. First operand has 55 places, 57 transitions, 311 flow. Second operand 5 states and 111 transitions. [2024-06-03 19:01:07,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 104 transitions, 685 flow [2024-06-03 19:01:07,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 104 transitions, 672 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-03 19:01:07,372 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 351 flow [2024-06-03 19:01:07,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-03 19:01:07,372 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 21 predicate places. [2024-06-03 19:01:07,372 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 351 flow [2024-06-03 19:01:07,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:07,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:07,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:07,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:01:07,373 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:07,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:07,374 INFO L85 PathProgramCache]: Analyzing trace with hash -730533490, now seen corresponding path program 1 times [2024-06-03 19:01:07,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:07,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957912421] [2024-06-03 19:01:07,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:07,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-03 19:01:07,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:07,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957912421] [2024-06-03 19:01:07,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957912421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:07,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:07,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:01:07,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013549740] [2024-06-03 19:01:07,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:07,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:01:07,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:07,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:01:07,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:01:07,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 43 [2024-06-03 19:01:07,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 351 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 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) [2024-06-03 19:01:07,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:07,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 43 [2024-06-03 19:01:07,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:08,560 INFO L124 PetriNetUnfolderBase]: 10034/13818 cut-off events. [2024-06-03 19:01:08,560 INFO L125 PetriNetUnfolderBase]: For 14595/14595 co-relation queries the response was YES. [2024-06-03 19:01:08,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38050 conditions, 13818 events. 10034/13818 cut-off events. For 14595/14595 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 69942 event pairs, 2141 based on Foata normal form. 80/13158 useless extension candidates. Maximal degree in co-relation 28144. Up to 9371 conditions per place. [2024-06-03 19:01:08,618 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 98 selfloop transitions, 7 changer transitions 6/112 dead transitions. [2024-06-03 19:01:08,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 112 transitions, 734 flow [2024-06-03 19:01:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:01:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:01:08,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-03 19:01:08,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5395348837209303 [2024-06-03 19:01:08,621 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 351 flow. Second operand 5 states and 116 transitions. [2024-06-03 19:01:08,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 112 transitions, 734 flow [2024-06-03 19:01:08,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 112 transitions, 721 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-03 19:01:08,634 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 368 flow [2024-06-03 19:01:08,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=368, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-03 19:01:08,635 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 25 predicate places. [2024-06-03 19:01:08,635 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 368 flow [2024-06-03 19:01:08,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 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) [2024-06-03 19:01:08,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:08,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:08,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:01:08,636 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:08,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:08,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1744838772, now seen corresponding path program 2 times [2024-06-03 19:01:08,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:08,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490265308] [2024-06-03 19:01:08,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:08,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-03 19:01:08,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:08,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490265308] [2024-06-03 19:01:08,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490265308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:08,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:08,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:01:08,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172038705] [2024-06-03 19:01:08,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:08,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:01:08,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:08,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:01:08,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:01:08,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 43 [2024-06-03 19:01:08,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 368 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 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) [2024-06-03 19:01:08,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:08,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 43 [2024-06-03 19:01:08,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:09,805 INFO L124 PetriNetUnfolderBase]: 10410/14306 cut-off events. [2024-06-03 19:01:09,805 INFO L125 PetriNetUnfolderBase]: For 19874/19874 co-relation queries the response was YES. [2024-06-03 19:01:09,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40357 conditions, 14306 events. 10410/14306 cut-off events. For 19874/19874 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 71723 event pairs, 2141 based on Foata normal form. 80/13614 useless extension candidates. Maximal degree in co-relation 30238. Up to 8987 conditions per place. [2024-06-03 19:01:09,862 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 95 selfloop transitions, 7 changer transitions 9/112 dead transitions. [2024-06-03 19:01:09,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 112 transitions, 745 flow [2024-06-03 19:01:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:01:09,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:01:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-03 19:01:09,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-03 19:01:09,866 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 368 flow. Second operand 5 states and 115 transitions. [2024-06-03 19:01:09,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 112 transitions, 745 flow [2024-06-03 19:01:09,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 112 transitions, 733 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:01:09,893 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 376 flow [2024-06-03 19:01:09,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=376, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2024-06-03 19:01:09,894 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 26 predicate places. [2024-06-03 19:01:09,895 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 376 flow [2024-06-03 19:01:09,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 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) [2024-06-03 19:01:09,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:09,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:09,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:01:09,895 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:09,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:09,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1933361362, now seen corresponding path program 1 times [2024-06-03 19:01:09,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:09,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768870574] [2024-06-03 19:01:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:09,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-03 19:01:09,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:09,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768870574] [2024-06-03 19:01:09,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768870574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:09,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:09,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:01:09,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076607807] [2024-06-03 19:01:09,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:09,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:01:09,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:09,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:01:09,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:01:09,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-03 19:01:09,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 376 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:09,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:09,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-03 19:01:09,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:10,840 INFO L124 PetriNetUnfolderBase]: 8324/11836 cut-off events. [2024-06-03 19:01:10,841 INFO L125 PetriNetUnfolderBase]: For 16784/17026 co-relation queries the response was YES. [2024-06-03 19:01:10,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33192 conditions, 11836 events. 8324/11836 cut-off events. For 16784/17026 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 62228 event pairs, 5333 based on Foata normal form. 0/11262 useless extension candidates. Maximal degree in co-relation 29672. Up to 10025 conditions per place. [2024-06-03 19:01:10,893 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 49 selfloop transitions, 2 changer transitions 29/82 dead transitions. [2024-06-03 19:01:10,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 626 flow [2024-06-03 19:01:10,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:01:10,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:01:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-03 19:01:10,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-03 19:01:10,894 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 376 flow. Second operand 5 states and 96 transitions. [2024-06-03 19:01:10,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 626 flow [2024-06-03 19:01:10,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 610 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-03 19:01:10,917 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 318 flow [2024-06-03 19:01:10,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=318, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2024-06-03 19:01:10,918 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 28 predicate places. [2024-06-03 19:01:10,919 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 318 flow [2024-06-03 19:01:10,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:10,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:10,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:10,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:01:10,919 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:10,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:10,920 INFO L85 PathProgramCache]: Analyzing trace with hash 872071951, now seen corresponding path program 1 times [2024-06-03 19:01:10,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:10,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995094742] [2024-06-03 19:01:10,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:10,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-03 19:01:10,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:10,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995094742] [2024-06-03 19:01:10,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995094742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:10,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:10,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:01:10,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007812642] [2024-06-03 19:01:10,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:10,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:01:11,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:11,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:01:11,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:01:11,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-03 19:01:11,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 318 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:11,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:11,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-03 19:01:11,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:11,685 INFO L124 PetriNetUnfolderBase]: 6614/9256 cut-off events. [2024-06-03 19:01:11,685 INFO L125 PetriNetUnfolderBase]: For 13020/13232 co-relation queries the response was YES. [2024-06-03 19:01:11,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26579 conditions, 9256 events. 6614/9256 cut-off events. For 13020/13232 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 44742 event pairs, 2579 based on Foata normal form. 48/9221 useless extension candidates. Maximal degree in co-relation 26549. Up to 4353 conditions per place. [2024-06-03 19:01:11,716 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 52 selfloop transitions, 10 changer transitions 24/88 dead transitions. [2024-06-03 19:01:11,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 88 transitions, 602 flow [2024-06-03 19:01:11,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:01:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:01:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-03 19:01:11,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-03 19:01:11,718 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 318 flow. Second operand 5 states and 105 transitions. [2024-06-03 19:01:11,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 88 transitions, 602 flow [2024-06-03 19:01:11,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 578 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:01:11,735 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 314 flow [2024-06-03 19:01:11,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2024-06-03 19:01:11,736 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 25 predicate places. [2024-06-03 19:01:11,736 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 314 flow [2024-06-03 19:01:11,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:11,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:11,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:11,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:01:11,737 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:11,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:11,737 INFO L85 PathProgramCache]: Analyzing trace with hash -737985354, now seen corresponding path program 1 times [2024-06-03 19:01:11,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:11,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9595688] [2024-06-03 19:01:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:11,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-03 19:01:11,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:11,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9595688] [2024-06-03 19:01:11,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9595688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:11,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:11,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:01:11,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926767696] [2024-06-03 19:01:11,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:11,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:01:11,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:11,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:01:11,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:01:11,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-03 19:01:11,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 314 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:11,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:11,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-03 19:01:11,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:12,335 INFO L124 PetriNetUnfolderBase]: 5226/7151 cut-off events. [2024-06-03 19:01:12,336 INFO L125 PetriNetUnfolderBase]: For 10456/10632 co-relation queries the response was YES. [2024-06-03 19:01:12,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20801 conditions, 7151 events. 5226/7151 cut-off events. For 10456/10632 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 31987 event pairs, 1851 based on Foata normal form. 57/7134 useless extension candidates. Maximal degree in co-relation 20765. Up to 3837 conditions per place. [2024-06-03 19:01:12,358 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 59 selfloop transitions, 7 changer transitions 24/92 dead transitions. [2024-06-03 19:01:12,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 92 transitions, 628 flow [2024-06-03 19:01:12,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:01:12,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:01:12,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-03 19:01:12,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-03 19:01:12,359 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 314 flow. Second operand 6 states and 118 transitions. [2024-06-03 19:01:12,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 92 transitions, 628 flow [2024-06-03 19:01:12,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 92 transitions, 597 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 19:01:12,376 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 290 flow [2024-06-03 19:01:12,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=290, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2024-06-03 19:01:12,377 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 24 predicate places. [2024-06-03 19:01:12,377 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 290 flow [2024-06-03 19:01:12,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:12,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:12,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:12,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:01:12,378 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:12,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:12,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1169601360, now seen corresponding path program 1 times [2024-06-03 19:01:12,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:12,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091454845] [2024-06-03 19:01:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:12,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-03 19:01:12,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:12,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091454845] [2024-06-03 19:01:12,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091454845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:12,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:12,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:01:12,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796013092] [2024-06-03 19:01:12,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:12,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:01:12,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:12,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:01:12,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:01:12,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 43 [2024-06-03 19:01:12,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 290 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:12,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:12,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 43 [2024-06-03 19:01:12,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:12,938 INFO L124 PetriNetUnfolderBase]: 5514/7307 cut-off events. [2024-06-03 19:01:12,938 INFO L125 PetriNetUnfolderBase]: For 14160/14160 co-relation queries the response was YES. [2024-06-03 19:01:12,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21602 conditions, 7307 events. 5514/7307 cut-off events. For 14160/14160 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30903 event pairs, 1014 based on Foata normal form. 64/7002 useless extension candidates. Maximal degree in co-relation 21566. Up to 5377 conditions per place. [2024-06-03 19:01:12,962 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 82 selfloop transitions, 7 changer transitions 12/102 dead transitions. [2024-06-03 19:01:12,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 645 flow [2024-06-03 19:01:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:01:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:01:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-03 19:01:12,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162790697674419 [2024-06-03 19:01:12,964 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 290 flow. Second operand 5 states and 111 transitions. [2024-06-03 19:01:12,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 645 flow [2024-06-03 19:01:12,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 102 transitions, 619 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 19:01:12,993 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 308 flow [2024-06-03 19:01:12,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-06-03 19:01:12,994 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 20 predicate places. [2024-06-03 19:01:12,994 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 308 flow [2024-06-03 19:01:12,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:12,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:12,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:12,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:01:12,995 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:12,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:12,995 INFO L85 PathProgramCache]: Analyzing trace with hash -496705076, now seen corresponding path program 2 times [2024-06-03 19:01:12,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:12,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554713525] [2024-06-03 19:01:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:12,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-03 19:01:13,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:13,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554713525] [2024-06-03 19:01:13,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554713525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:13,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:13,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:01:13,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458941741] [2024-06-03 19:01:13,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:13,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:01:13,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:13,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:01:13,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:01:13,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 43 [2024-06-03 19:01:13,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:13,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:13,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 43 [2024-06-03 19:01:13,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:13,541 INFO L124 PetriNetUnfolderBase]: 5274/7003 cut-off events. [2024-06-03 19:01:13,542 INFO L125 PetriNetUnfolderBase]: For 14532/14532 co-relation queries the response was YES. [2024-06-03 19:01:13,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19776 conditions, 7003 events. 5274/7003 cut-off events. For 14532/14532 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 29719 event pairs, 1194 based on Foata normal form. 64/5884 useless extension candidates. Maximal degree in co-relation 19742. Up to 5271 conditions per place. [2024-06-03 19:01:13,570 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 79 selfloop transitions, 7 changer transitions 12/99 dead transitions. [2024-06-03 19:01:13,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 629 flow [2024-06-03 19:01:13,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:01:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:01:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-06-03 19:01:13,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023255813953489 [2024-06-03 19:01:13,572 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 308 flow. Second operand 5 states and 108 transitions. [2024-06-03 19:01:13,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 629 flow [2024-06-03 19:01:13,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 99 transitions, 615 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-03 19:01:13,608 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 312 flow [2024-06-03 19:01:13,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2024-06-03 19:01:13,609 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 22 predicate places. [2024-06-03 19:01:13,609 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 312 flow [2024-06-03 19:01:13,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:13,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:13,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:13,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:01:13,610 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:13,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:13,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1976566925, now seen corresponding path program 1 times [2024-06-03 19:01:13,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:13,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011943287] [2024-06-03 19:01:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:13,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-03 19:01:13,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:13,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011943287] [2024-06-03 19:01:13,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011943287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:13,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:13,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:01:13,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861207837] [2024-06-03 19:01:13,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:13,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:01:13,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:13,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:01:13,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:01:13,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 43 [2024-06-03 19:01:13,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 312 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:13,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:13,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 43 [2024-06-03 19:01:13,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:14,133 INFO L124 PetriNetUnfolderBase]: 5690/7547 cut-off events. [2024-06-03 19:01:14,133 INFO L125 PetriNetUnfolderBase]: For 16925/16925 co-relation queries the response was YES. [2024-06-03 19:01:14,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21429 conditions, 7547 events. 5690/7547 cut-off events. For 16925/16925 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 32485 event pairs, 1257 based on Foata normal form. 64/6332 useless extension candidates. Maximal degree in co-relation 21394. Up to 5647 conditions per place. [2024-06-03 19:01:14,161 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 80 selfloop transitions, 7 changer transitions 15/103 dead transitions. [2024-06-03 19:01:14,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 103 transitions, 659 flow [2024-06-03 19:01:14,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:01:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:01:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-03 19:01:14,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162790697674419 [2024-06-03 19:01:14,163 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 312 flow. Second operand 5 states and 111 transitions. [2024-06-03 19:01:14,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 103 transitions, 659 flow [2024-06-03 19:01:14,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 103 transitions, 643 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 19:01:14,196 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 326 flow [2024-06-03 19:01:14,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=326, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2024-06-03 19:01:14,197 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 24 predicate places. [2024-06-03 19:01:14,197 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 326 flow [2024-06-03 19:01:14,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:14,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:14,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:14,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:01:14,197 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:14,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:14,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1976562275, now seen corresponding path program 2 times [2024-06-03 19:01:14,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:14,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530697483] [2024-06-03 19:01:14,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:14,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-03 19:01:14,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:14,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530697483] [2024-06-03 19:01:14,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530697483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:14,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:14,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:01:14,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401274038] [2024-06-03 19:01:14,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:14,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:01:14,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:14,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:01:14,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:01:14,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 43 [2024-06-03 19:01:14,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 326 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:14,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:14,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 43 [2024-06-03 19:01:14,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:14,747 INFO L124 PetriNetUnfolderBase]: 5450/7243 cut-off events. [2024-06-03 19:01:14,748 INFO L125 PetriNetUnfolderBase]: For 16049/16049 co-relation queries the response was YES. [2024-06-03 19:01:14,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20210 conditions, 7243 events. 5450/7243 cut-off events. For 16049/16049 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 31177 event pairs, 1170 based on Foata normal form. 64/6076 useless extension candidates. Maximal degree in co-relation 20174. Up to 5511 conditions per place. [2024-06-03 19:01:14,777 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 74 selfloop transitions, 7 changer transitions 18/100 dead transitions. [2024-06-03 19:01:14,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 100 transitions, 651 flow [2024-06-03 19:01:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:01:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:01:14,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-06-03 19:01:14,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023255813953489 [2024-06-03 19:01:14,779 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 326 flow. Second operand 5 states and 108 transitions. [2024-06-03 19:01:14,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 100 transitions, 651 flow [2024-06-03 19:01:14,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 100 transitions, 639 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:01:14,815 INFO L231 Difference]: Finished difference. Result has 65 places, 52 transitions, 332 flow [2024-06-03 19:01:14,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=65, PETRI_TRANSITIONS=52} [2024-06-03 19:01:14,815 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 26 predicate places. [2024-06-03 19:01:14,815 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 52 transitions, 332 flow [2024-06-03 19:01:14,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:14,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:14,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:14,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:01:14,816 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:14,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:14,817 INFO L85 PathProgramCache]: Analyzing trace with hash -231842449, now seen corresponding path program 1 times [2024-06-03 19:01:14,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:14,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259401386] [2024-06-03 19:01:14,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:14,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:14,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-03 19:01:14,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:14,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259401386] [2024-06-03 19:01:14,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259401386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:14,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:14,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:01:14,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055475854] [2024-06-03 19:01:14,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:14,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:01:14,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:14,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:01:14,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:01:14,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 43 [2024-06-03 19:01:14,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 52 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:14,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:14,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 43 [2024-06-03 19:01:14,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:15,455 INFO L124 PetriNetUnfolderBase]: 5866/7787 cut-off events. [2024-06-03 19:01:15,456 INFO L125 PetriNetUnfolderBase]: For 18369/18369 co-relation queries the response was YES. [2024-06-03 19:01:15,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21799 conditions, 7787 events. 5866/7787 cut-off events. For 18369/18369 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 33577 event pairs, 918 based on Foata normal form. 64/6524 useless extension candidates. Maximal degree in co-relation 21762. Up to 5101 conditions per place. [2024-06-03 19:01:15,480 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 65 selfloop transitions, 5 changer transitions 51/122 dead transitions. [2024-06-03 19:01:15,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 122 transitions, 765 flow [2024-06-03 19:01:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:01:15,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:01:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-03 19:01:15,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193798449612403 [2024-06-03 19:01:15,481 INFO L175 Difference]: Start difference. First operand has 65 places, 52 transitions, 332 flow. Second operand 6 states and 134 transitions. [2024-06-03 19:01:15,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 122 transitions, 765 flow [2024-06-03 19:01:15,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 122 transitions, 751 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-03 19:01:15,518 INFO L231 Difference]: Finished difference. Result has 68 places, 50 transitions, 308 flow [2024-06-03 19:01:15,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=68, PETRI_TRANSITIONS=50} [2024-06-03 19:01:15,519 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 29 predicate places. [2024-06-03 19:01:15,519 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 50 transitions, 308 flow [2024-06-03 19:01:15,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:15,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:15,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:15,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:01:15,520 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:15,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash -231837799, now seen corresponding path program 2 times [2024-06-03 19:01:15,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:15,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766266554] [2024-06-03 19:01:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:15,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-03 19:01:15,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:15,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766266554] [2024-06-03 19:01:15,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766266554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:15,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:15,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:01:15,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131868876] [2024-06-03 19:01:15,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:15,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:01:15,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:15,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:01:15,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:01:15,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 43 [2024-06-03 19:01:15,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 50 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:15,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:15,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 43 [2024-06-03 19:01:15,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:16,104 INFO L124 PetriNetUnfolderBase]: 5286/7031 cut-off events. [2024-06-03 19:01:16,104 INFO L125 PetriNetUnfolderBase]: For 17865/17865 co-relation queries the response was YES. [2024-06-03 19:01:16,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19644 conditions, 7031 events. 5286/7031 cut-off events. For 17865/17865 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 29737 event pairs, 1062 based on Foata normal form. 64/5888 useless extension candidates. Maximal degree in co-relation 19606. Up to 4525 conditions per place. [2024-06-03 19:01:16,127 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 50 selfloop transitions, 3 changer transitions 63/117 dead transitions. [2024-06-03 19:01:16,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 117 transitions, 725 flow [2024-06-03 19:01:16,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:01:16,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:01:16,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-03 19:01:16,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038759689922481 [2024-06-03 19:01:16,129 INFO L175 Difference]: Start difference. First operand has 68 places, 50 transitions, 308 flow. Second operand 6 states and 130 transitions. [2024-06-03 19:01:16,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 117 transitions, 725 flow [2024-06-03 19:01:16,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 117 transitions, 705 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 19:01:16,174 INFO L231 Difference]: Finished difference. Result has 66 places, 47 transitions, 272 flow [2024-06-03 19:01:16,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=66, PETRI_TRANSITIONS=47} [2024-06-03 19:01:16,175 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 27 predicate places. [2024-06-03 19:01:16,175 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 47 transitions, 272 flow [2024-06-03 19:01:16,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:16,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:16,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:16,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:01:16,175 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:16,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:16,176 INFO L85 PathProgramCache]: Analyzing trace with hash -231669469, now seen corresponding path program 3 times [2024-06-03 19:01:16,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:16,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162367864] [2024-06-03 19:01:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:16,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-03 19:01:16,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:16,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162367864] [2024-06-03 19:01:16,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162367864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:16,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:16,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:01:16,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14153358] [2024-06-03 19:01:16,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:16,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:01:16,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:16,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:01:16,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:01:16,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 43 [2024-06-03 19:01:16,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 47 transitions, 272 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:16,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:16,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 43 [2024-06-03 19:01:16,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:16,685 INFO L124 PetriNetUnfolderBase]: 4316/5745 cut-off events. [2024-06-03 19:01:16,685 INFO L125 PetriNetUnfolderBase]: For 13781/13781 co-relation queries the response was YES. [2024-06-03 19:01:16,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15922 conditions, 5745 events. 4316/5745 cut-off events. For 13781/13781 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 22902 event pairs, 690 based on Foata normal form. 64/4821 useless extension candidates. Maximal degree in co-relation 15885. Up to 3089 conditions per place. [2024-06-03 19:01:16,703 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 55 selfloop transitions, 4 changer transitions 51/111 dead transitions. [2024-06-03 19:01:16,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 111 transitions, 668 flow [2024-06-03 19:01:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:01:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:01:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-03 19:01:16,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49224806201550386 [2024-06-03 19:01:16,705 INFO L175 Difference]: Start difference. First operand has 66 places, 47 transitions, 272 flow. Second operand 6 states and 127 transitions. [2024-06-03 19:01:16,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 111 transitions, 668 flow [2024-06-03 19:01:16,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 111 transitions, 629 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 19:01:16,730 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 233 flow [2024-06-03 19:01:16,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2024-06-03 19:01:16,731 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 22 predicate places. [2024-06-03 19:01:16,731 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 233 flow [2024-06-03 19:01:16,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:16,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:16,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:16,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:01:16,732 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:16,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:16,732 INFO L85 PathProgramCache]: Analyzing trace with hash -231659239, now seen corresponding path program 4 times [2024-06-03 19:01:16,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:16,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924345326] [2024-06-03 19:01:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:16,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:16,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-03 19:01:16,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:16,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924345326] [2024-06-03 19:01:16,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924345326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:16,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:16,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:01:16,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867864781] [2024-06-03 19:01:16,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:16,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:01:16,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:16,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:01:16,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:01:16,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 43 [2024-06-03 19:01:16,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:16,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:16,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 43 [2024-06-03 19:01:16,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:17,188 INFO L124 PetriNetUnfolderBase]: 3736/4989 cut-off events. [2024-06-03 19:01:17,188 INFO L125 PetriNetUnfolderBase]: For 8601/8601 co-relation queries the response was YES. [2024-06-03 19:01:17,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13174 conditions, 4989 events. 3736/4989 cut-off events. For 8601/8601 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19395 event pairs, 834 based on Foata normal form. 64/4185 useless extension candidates. Maximal degree in co-relation 13140. Up to 2513 conditions per place. [2024-06-03 19:01:17,202 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 43 selfloop transitions, 2 changer transitions 60/106 dead transitions. [2024-06-03 19:01:17,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 106 transitions, 603 flow [2024-06-03 19:01:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:01:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:01:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-03 19:01:17,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-03 19:01:17,204 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 233 flow. Second operand 6 states and 123 transitions. [2024-06-03 19:01:17,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 106 transitions, 603 flow [2024-06-03 19:01:17,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 106 transitions, 585 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 19:01:17,219 INFO L231 Difference]: Finished difference. Result has 59 places, 42 transitions, 196 flow [2024-06-03 19:01:17,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=59, PETRI_TRANSITIONS=42} [2024-06-03 19:01:17,220 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 20 predicate places. [2024-06-03 19:01:17,220 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 42 transitions, 196 flow [2024-06-03 19:01:17,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:17,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:17,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:17,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:01:17,221 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:17,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:17,221 INFO L85 PathProgramCache]: Analyzing trace with hash -231520669, now seen corresponding path program 5 times [2024-06-03 19:01:17,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:17,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798040248] [2024-06-03 19:01:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:17,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-03 19:01:17,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:17,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798040248] [2024-06-03 19:01:17,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798040248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:17,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:17,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:01:17,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718509208] [2024-06-03 19:01:17,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:17,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:01:17,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:17,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:01:17,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:01:17,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 43 [2024-06-03 19:01:17,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 196 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:17,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:17,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 43 [2024-06-03 19:01:17,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:17,608 INFO L124 PetriNetUnfolderBase]: 2784/3733 cut-off events. [2024-06-03 19:01:17,608 INFO L125 PetriNetUnfolderBase]: For 5663/5663 co-relation queries the response was YES. [2024-06-03 19:01:17,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9601 conditions, 3733 events. 2784/3733 cut-off events. For 5663/5663 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13687 event pairs, 498 based on Foata normal form. 64/3145 useless extension candidates. Maximal degree in co-relation 9568. Up to 1425 conditions per place. [2024-06-03 19:01:17,619 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 48 selfloop transitions, 3 changer transitions 48/100 dead transitions. [2024-06-03 19:01:17,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 100 transitions, 540 flow [2024-06-03 19:01:17,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:01:17,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:01:17,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-03 19:01:17,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-03 19:01:17,620 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 196 flow. Second operand 6 states and 120 transitions. [2024-06-03 19:01:17,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 100 transitions, 540 flow [2024-06-03 19:01:17,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 100 transitions, 500 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 19:01:17,627 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 158 flow [2024-06-03 19:01:17,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2024-06-03 19:01:17,628 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 13 predicate places. [2024-06-03 19:01:17,628 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 158 flow [2024-06-03 19:01:17,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:17,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:01:17,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:17,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:01:17,629 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:01:17,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:01:17,629 INFO L85 PathProgramCache]: Analyzing trace with hash -231515089, now seen corresponding path program 6 times [2024-06-03 19:01:17,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:01:17,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816458075] [2024-06-03 19:01:17,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:01:17,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:01:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:01:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-03 19:01:17,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:01:17,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816458075] [2024-06-03 19:01:17,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816458075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:01:17,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:01:17,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:01:17,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686724433] [2024-06-03 19:01:17,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:01:17,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:01:17,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:01:17,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:01:17,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:01:17,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 43 [2024-06-03 19:01:17,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:17,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:01:17,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 43 [2024-06-03 19:01:17,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:01:17,941 INFO L124 PetriNetUnfolderBase]: 1680/2309 cut-off events. [2024-06-03 19:01:17,941 INFO L125 PetriNetUnfolderBase]: For 1636/1636 co-relation queries the response was YES. [2024-06-03 19:01:17,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5370 conditions, 2309 events. 1680/2309 cut-off events. For 1636/1636 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8054 event pairs, 306 based on Foata normal form. 64/1961 useless extension candidates. Maximal degree in co-relation 5357. Up to 629 conditions per place. [2024-06-03 19:01:17,945 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 0 selfloop transitions, 0 changer transitions 81/81 dead transitions. [2024-06-03 19:01:17,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 81 transitions, 400 flow [2024-06-03 19:01:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:01:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:01:17,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-03 19:01:17,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-03 19:01:17,947 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 158 flow. Second operand 6 states and 102 transitions. [2024-06-03 19:01:17,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 81 transitions, 400 flow [2024-06-03 19:01:17,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 81 transitions, 392 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:01:17,948 INFO L231 Difference]: Finished difference. Result has 49 places, 0 transitions, 0 flow [2024-06-03 19:01:17,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=49, PETRI_TRANSITIONS=0} [2024-06-03 19:01:17,949 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 10 predicate places. [2024-06-03 19:01:17,949 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 0 transitions, 0 flow [2024-06-03 19:01:17,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:01:17,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-03 19:01:17,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-03 19:01:17,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-03 19:01:17,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-03 19:01:17,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-03 19:01:17,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-03 19:01:17,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:01:17,953 INFO L445 BasicCegarLoop]: Path program histogram: [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:01:17,955 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-03 19:01:17,955 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-03 19:01:17,958 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-03 19:01:17,958 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-03 19:01:17,959 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.06 07:01:17 BasicIcfg [2024-06-03 19:01:17,959 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-03 19:01:17,959 INFO L158 Benchmark]: Toolchain (without parser) took 16343.50ms. Allocated memory was 127.9MB in the beginning and 8.1GB in the end (delta: 8.0GB). Free memory was 68.9MB in the beginning and 5.4GB in the end (delta: -5.3GB). Peak memory consumption was 2.6GB. Max. memory is 16.1GB. [2024-06-03 19:01:17,959 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 127.9MB. Free memory was 91.3MB in the beginning and 91.2MB in the end (delta: 83.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 19:01:17,960 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 127.9MB. Free memory is still 72.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 19:01:17,960 INFO L158 Benchmark]: CACSL2BoogieTranslator took 310.39ms. Allocated memory is still 127.9MB. Free memory was 68.7MB in the beginning and 99.4MB in the end (delta: -30.7MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. [2024-06-03 19:01:17,960 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.57ms. Allocated memory was 127.9MB in the beginning and 203.4MB in the end (delta: 75.5MB). Free memory was 99.3MB in the beginning and 175.4MB in the end (delta: -76.0MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2024-06-03 19:01:17,960 INFO L158 Benchmark]: Boogie Preprocessor took 74.59ms. Allocated memory is still 203.4MB. Free memory was 175.4MB in the beginning and 172.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 19:01:17,961 INFO L158 Benchmark]: RCFGBuilder took 777.84ms. Allocated memory is still 203.4MB. Free memory was 172.2MB in the beginning and 93.6MB in the end (delta: 78.6MB). Peak memory consumption was 79.7MB. Max. memory is 16.1GB. [2024-06-03 19:01:17,961 INFO L158 Benchmark]: TraceAbstraction took 15128.58ms. Allocated memory was 203.4MB in the beginning and 8.1GB in the end (delta: 7.9GB). Free memory was 92.5MB in the beginning and 5.4GB in the end (delta: -5.3GB). Peak memory consumption was 2.6GB. Max. memory is 16.1GB. [2024-06-03 19:01:17,962 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 127.9MB. Free memory was 91.3MB in the beginning and 91.2MB in the end (delta: 83.1kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.17ms. Allocated memory is still 127.9MB. Free memory is still 72.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 310.39ms. Allocated memory is still 127.9MB. Free memory was 68.7MB in the beginning and 99.4MB in the end (delta: -30.7MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.57ms. Allocated memory was 127.9MB in the beginning and 203.4MB in the end (delta: 75.5MB). Free memory was 99.3MB in the beginning and 175.4MB in the end (delta: -76.0MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 74.59ms. Allocated memory is still 203.4MB. Free memory was 175.4MB in the beginning and 172.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 777.84ms. Allocated memory is still 203.4MB. Free memory was 172.2MB in the beginning and 93.6MB in the end (delta: 78.6MB). Peak memory consumption was 79.7MB. Max. memory is 16.1GB. * TraceAbstraction took 15128.58ms. Allocated memory was 203.4MB in the beginning and 8.1GB in the end (delta: 7.9GB). Free memory was 92.5MB in the beginning and 5.4GB in the end (delta: -5.3GB). Peak memory consumption was 2.6GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 93]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 94]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 95]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 50 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 15.0s, OverallIterations: 22, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 12.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1151 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1063 mSDsluCounter, 26 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 111 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4711 IncrementalHoareTripleChecker+Invalid, 4822 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 111 mSolverCounterUnsat, 26 mSDtfsCounter, 4711 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=376occurred in iteration=9, InterpolantAutomatonStates: 113, 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, 0.2s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 434 NumberOfCodeBlocks, 434 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 412 ConstructedInterpolants, 0 QuantifiedInterpolants, 3583 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 22 PerfectInterpolantSequences, 44/44 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-03 19:01:17,991 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