./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/test-context1.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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/test-context1.wvr.c ./goblint.2024-05-07_14-17-48.files/protection/test-context1.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 --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 12:54:50,961 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 12:54:51,025 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 12:54:51,029 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 12:54:51,030 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 12:54:51,052 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 12:54:51,053 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 12:54:51,053 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 12:54:51,054 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 12:54:51,057 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 12:54:51,057 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 12:54:51,057 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 12:54:51,058 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 12:54:51,059 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 12:54:51,059 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 12:54:51,059 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 12:54:51,060 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 12:54:51,060 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 12:54:51,060 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 12:54:51,060 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 12:54:51,061 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 12:54:51,062 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 12:54:51,062 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 12:54:51,062 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 12:54:51,062 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 12:54:51,063 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 12:54:51,063 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 12:54:51,063 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 12:54:51,064 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 12:54:51,064 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 12:54:51,065 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 12:54:51,065 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 12:54:51,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:54:51,065 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 12:54:51,065 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 12:54:51,066 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 12:54:51,066 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 12:54:51,066 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 12:54:51,066 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 12:54:51,066 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 12:54:51,067 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 12:54:51,067 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 12:54:51,067 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 12:54:51,067 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 12:54:51,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 12:54:51,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 12:54:51,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 12:54:51,299 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 12:54:51,300 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 12:54:51,301 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2024-05-12 12:54:52,461 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 12:54:52,616 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 12:54:52,617 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2024-05-12 12:54:52,626 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e34bfab6c/1188b840a791470f8305e2b9e955f878/FLAG8c13aac1f [2024-05-12 12:54:52,636 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e34bfab6c/1188b840a791470f8305e2b9e955f878 [2024-05-12 12:54:52,638 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 12:54:52,639 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 12:54:52,639 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/test-context1.wvr.yml/witness.yml [2024-05-12 12:54:52,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 12:54:52,706 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 12:54:52,707 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 12:54:52,707 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 12:54:52,710 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 12:54:52,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:54:52" (1/2) ... [2024-05-12 12:54:52,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@452b3eec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:54:52, skipping insertion in model container [2024-05-12 12:54:52,712 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:54:52" (1/2) ... [2024-05-12 12:54:52,713 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a2ac1b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:54:52, skipping insertion in model container [2024-05-12 12:54:52,713 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:54:52" (2/2) ... [2024-05-12 12:54:52,713 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@452b3eec and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:54:52, skipping insertion in model container [2024-05-12 12:54:52,714 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:54:52" (2/2) ... [2024-05-12 12:54:52,714 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 12:54:52,722 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 12:54:52,723 INFO L97 edCorrectnessWitness]: Location invariant before [L80-L80] ! multithreaded || 0 <= front [2024-05-12 12:54:52,723 INFO L97 edCorrectnessWitness]: Location invariant before [L81-L81] ! multithreaded || 0 <= front [2024-05-12 12:54:52,723 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 12:54:52,723 INFO L106 edCorrectnessWitness]: ghost_update [L79-L79] multithreaded = 1; [2024-05-12 12:54:52,737 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:54:52,910 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2433,2446] [2024-05-12 12:54:52,916 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:54:52,923 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 12:54:52,959 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2433,2446] [2024-05-12 12:54:52,962 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:54:52,974 INFO L206 MainTranslator]: Completed translation [2024-05-12 12:54:52,975 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:54:52 WrapperNode [2024-05-12 12:54:52,976 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 12:54:52,977 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 12:54:52,978 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 12:54:52,978 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 12:54:52,983 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 12.05 12:54:52" (1/1) ... [2024-05-12 12:54:53,008 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 12.05 12:54:52" (1/1) ... [2024-05-12 12:54:53,036 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 140 [2024-05-12 12:54:53,036 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 12:54:53,037 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 12:54:53,037 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 12:54:53,037 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 12:54:53,044 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:54:52" (1/1) ... [2024-05-12 12:54:53,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:54:52" (1/1) ... [2024-05-12 12:54:53,054 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:54:52" (1/1) ... [2024-05-12 12:54:53,076 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 2, 2, 3]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 12:54:53,077 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:54:52" (1/1) ... [2024-05-12 12:54:53,077 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:54:52" (1/1) ... [2024-05-12 12:54:53,086 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:54:52" (1/1) ... [2024-05-12 12:54:53,090 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:54:52" (1/1) ... [2024-05-12 12:54:53,093 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:54:52" (1/1) ... [2024-05-12 12:54:53,094 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:54:52" (1/1) ... [2024-05-12 12:54:53,099 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 12:54:53,100 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 12:54:53,100 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 12:54:53,100 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 12:54:53,101 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:54:52" (1/1) ... [2024-05-12 12:54:53,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:54:53,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:54:53,123 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) [2024-05-12 12:54:53,129 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 [2024-05-12 12:54:53,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 12:54:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-05-12 12:54:53,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-05-12 12:54:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-05-12 12:54:53,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-05-12 12:54:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 12:54:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 12:54:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 12:54:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 12:54:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 12:54:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 12:54:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 12:54:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 12:54:53,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 12:54:53,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 12:54:53,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 12:54:53,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-05-12 12:54:53,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 12:54:53,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 12:54:53,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-05-12 12:54:53,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-05-12 12:54:53,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-05-12 12:54:53,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-05-12 12:54:53,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 12:54:53,155 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 12:54:53,256 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 12:54:53,257 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 12:54:53,485 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 12:54:53,485 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 12:54:53,679 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 12:54:53,680 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-05-12 12:54:53,680 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:54:53 BoogieIcfgContainer [2024-05-12 12:54:53,680 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 12:54:53,683 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 12:54:53,683 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 12:54:53,685 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 12:54:53,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 12:54:52" (1/4) ... [2024-05-12 12:54:53,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49afd865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:54:53, skipping insertion in model container [2024-05-12 12:54:53,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:54:52" (2/4) ... [2024-05-12 12:54:53,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49afd865 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:54:53, skipping insertion in model container [2024-05-12 12:54:53,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:54:52" (3/4) ... [2024-05-12 12:54:53,687 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49afd865 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:54:53, skipping insertion in model container [2024-05-12 12:54:53,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:54:53" (4/4) ... [2024-05-12 12:54:53,687 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2024-05-12 12:54:53,700 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 12:54:53,701 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-05-12 12:54:53,702 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 12:54:53,744 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-05-12 12:54:53,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 33 transitions, 80 flow [2024-05-12 12:54:53,801 INFO L124 PetriNetUnfolderBase]: 5/31 cut-off events. [2024-05-12 12:54:53,802 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-05-12 12:54:53,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 5/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-05-12 12:54:53,805 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 33 transitions, 80 flow [2024-05-12 12:54:53,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 72 flow [2024-05-12 12:54:53,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 12:54:53,818 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;@3b90b906, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 12:54:53,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-05-12 12:54:53,823 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 12:54:53,823 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2024-05-12 12:54:53,823 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:54:53,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:54:53,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:54:53,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:54:53,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:54:53,828 INFO L85 PathProgramCache]: Analyzing trace with hash 934804022, now seen corresponding path program 1 times [2024-05-12 12:54:53,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:54:53,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29003204] [2024-05-12 12:54:53,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:54:53,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:54:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:54:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:54:54,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:54:54,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29003204] [2024-05-12 12:54:54,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29003204] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:54:54,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:54:54,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 12:54:54,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859221136] [2024-05-12 12:54:54,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:54:54,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:54:54,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:54:54,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:54:54,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:54:54,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 12:54:54,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:54,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:54:54,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 12:54:54,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:54:54,294 INFO L124 PetriNetUnfolderBase]: 222/390 cut-off events. [2024-05-12 12:54:54,294 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-05-12 12:54:54,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 390 events. 222/390 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1610 event pairs, 84 based on Foata normal form. 63/368 useless extension candidates. Maximal degree in co-relation 680. Up to 209 conditions per place. [2024-05-12 12:54:54,300 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 36 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-05-12 12:54:54,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 176 flow [2024-05-12 12:54:54,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:54:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:54:54,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-05-12 12:54:54,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959595959595959 [2024-05-12 12:54:54,312 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 72 flow. Second operand 3 states and 59 transitions. [2024-05-12 12:54:54,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 176 flow [2024-05-12 12:54:54,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:54:54,318 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 70 flow [2024-05-12 12:54:54,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2024-05-12 12:54:54,325 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -2 predicate places. [2024-05-12 12:54:54,325 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 70 flow [2024-05-12 12:54:54,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:54,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:54:54,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:54:54,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 12:54:54,326 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:54:54,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:54:54,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1214223962, now seen corresponding path program 1 times [2024-05-12 12:54:54,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:54:54,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408988970] [2024-05-12 12:54:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:54:54,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:54:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:54:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:54:54,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:54:54,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408988970] [2024-05-12 12:54:54,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408988970] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:54:54,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:54:54,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:54:54,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606640100] [2024-05-12 12:54:54,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:54:54,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:54:54,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:54:54,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:54:54,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:54:54,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-05-12 12:54:54,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:54,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:54:54,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-05-12 12:54:54,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:54:54,556 INFO L124 PetriNetUnfolderBase]: 280/520 cut-off events. [2024-05-12 12:54:54,557 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-05-12 12:54:54,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1066 conditions, 520 events. 280/520 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2350 event pairs, 116 based on Foata normal form. 14/440 useless extension candidates. Maximal degree in co-relation 664. Up to 336 conditions per place. [2024-05-12 12:54:54,563 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 38 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2024-05-12 12:54:54,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 44 transitions, 185 flow [2024-05-12 12:54:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:54:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:54:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-05-12 12:54:54,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6161616161616161 [2024-05-12 12:54:54,565 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 70 flow. Second operand 3 states and 61 transitions. [2024-05-12 12:54:54,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 44 transitions, 185 flow [2024-05-12 12:54:54,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 44 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:54:54,568 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 80 flow [2024-05-12 12:54:54,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2024-05-12 12:54:54,569 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2024-05-12 12:54:54,569 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 80 flow [2024-05-12 12:54:54,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:54,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:54:54,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:54:54,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 12:54:54,570 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:54:54,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:54:54,572 INFO L85 PathProgramCache]: Analyzing trace with hash -875419486, now seen corresponding path program 1 times [2024-05-12 12:54:54,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:54:54,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406999510] [2024-05-12 12:54:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:54:54,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:54:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:54:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:54:54,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:54:54,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406999510] [2024-05-12 12:54:54,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406999510] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:54:54,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:54:54,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:54:54,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087400442] [2024-05-12 12:54:54,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:54:54,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:54:54,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:54:54,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:54:54,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:54:54,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 12:54:54,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:54,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:54:54,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 12:54:54,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:54:54,716 INFO L124 PetriNetUnfolderBase]: 276/505 cut-off events. [2024-05-12 12:54:54,716 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-05-12 12:54:54,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1098 conditions, 505 events. 276/505 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2260 event pairs, 158 based on Foata normal form. 16/430 useless extension candidates. Maximal degree in co-relation 700. Up to 318 conditions per place. [2024-05-12 12:54:54,719 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 36 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-05-12 12:54:54,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 182 flow [2024-05-12 12:54:54,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:54:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:54:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 58 transitions. [2024-05-12 12:54:54,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-05-12 12:54:54,721 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 80 flow. Second operand 4 states and 58 transitions. [2024-05-12 12:54:54,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 182 flow [2024-05-12 12:54:54,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 41 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:54:54,724 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 78 flow [2024-05-12 12:54:54,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-05-12 12:54:54,725 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2024-05-12 12:54:54,725 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 78 flow [2024-05-12 12:54:54,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:54,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:54:54,725 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] [2024-05-12 12:54:54,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 12:54:54,726 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:54:54,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:54:54,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1616220155, now seen corresponding path program 1 times [2024-05-12 12:54:54,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:54:54,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214735053] [2024-05-12 12:54:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:54:54,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:54:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:54:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:54:54,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:54:54,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214735053] [2024-05-12 12:54:54,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214735053] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:54:54,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:54:54,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:54:54,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385654611] [2024-05-12 12:54:54,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:54:54,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:54:54,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:54:54,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:54:54,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:54:54,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-05-12 12:54:54,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:54,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:54:54,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-05-12 12:54:54,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:54:54,917 INFO L124 PetriNetUnfolderBase]: 276/501 cut-off events. [2024-05-12 12:54:54,917 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-05-12 12:54:54,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 501 events. 276/501 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2230 event pairs, 158 based on Foata normal form. 2/412 useless extension candidates. Maximal degree in co-relation 679. Up to 316 conditions per place. [2024-05-12 12:54:54,919 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 32 selfloop transitions, 2 changer transitions 3/40 dead transitions. [2024-05-12 12:54:54,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 180 flow [2024-05-12 12:54:54,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:54:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:54:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-05-12 12:54:54,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-05-12 12:54:54,921 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 78 flow. Second operand 3 states and 58 transitions. [2024-05-12 12:54:54,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 180 flow [2024-05-12 12:54:54,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 177 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:54:54,922 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 83 flow [2024-05-12 12:54:54,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2024-05-12 12:54:54,923 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2024-05-12 12:54:54,923 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 83 flow [2024-05-12 12:54:54,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:54,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:54:54,923 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:54:54,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 12:54:54,924 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:54:54,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:54:54,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1485209047, now seen corresponding path program 1 times [2024-05-12 12:54:54,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:54:54,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072134608] [2024-05-12 12:54:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:54:54,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:54:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:54:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:54:55,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:54:55,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072134608] [2024-05-12 12:54:55,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072134608] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:54:55,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:54:55,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:54:55,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519456154] [2024-05-12 12:54:55,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:54:55,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:54:55,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:54:55,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:54:55,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:54:55,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 12:54:55,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 83 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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) [2024-05-12 12:54:55,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:54:55,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 12:54:55,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:54:55,112 INFO L124 PetriNetUnfolderBase]: 348/651 cut-off events. [2024-05-12 12:54:55,113 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2024-05-12 12:54:55,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1422 conditions, 651 events. 348/651 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3191 event pairs, 306 based on Foata normal form. 15/546 useless extension candidates. Maximal degree in co-relation 980. Up to 477 conditions per place. [2024-05-12 12:54:55,115 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 24 selfloop transitions, 2 changer transitions 18/47 dead transitions. [2024-05-12 12:54:55,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 213 flow [2024-05-12 12:54:55,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:54:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:54:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-05-12 12:54:55,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-05-12 12:54:55,116 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 83 flow. Second operand 4 states and 63 transitions. [2024-05-12 12:54:55,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 213 flow [2024-05-12 12:54:55,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 47 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:54:55,118 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 93 flow [2024-05-12 12:54:55,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2024-05-12 12:54:55,118 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2024-05-12 12:54:55,119 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 93 flow [2024-05-12 12:54:55,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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) [2024-05-12 12:54:55,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:54:55,119 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:54:55,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 12:54:55,119 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:54:55,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:54:55,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1271788637, now seen corresponding path program 1 times [2024-05-12 12:54:55,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:54:55,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002391634] [2024-05-12 12:54:55,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:54:55,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:54:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:54:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:54:55,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:54:55,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002391634] [2024-05-12 12:54:55,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002391634] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:54:55,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250697645] [2024-05-12 12:54:55,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:54:55,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:54:55,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:54:55,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:54:55,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-05-12 12:54:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:54:55,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2024-05-12 12:54:55,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:54:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:54:55,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:54:55,551 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 12:54:55,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-05-12 12:54:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:54:55,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250697645] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:54:55,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:54:55,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-05-12 12:54:55,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57382514] [2024-05-12 12:54:55,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:54:55,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 12:54:55,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:54:55,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 12:54:55,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 12:54:55,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 12:54:55,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 93 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:55,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:54:55,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 12:54:55,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:54:55,724 INFO L124 PetriNetUnfolderBase]: 364/670 cut-off events. [2024-05-12 12:54:55,725 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2024-05-12 12:54:55,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1470 conditions, 670 events. 364/670 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3032 event pairs, 72 based on Foata normal form. 1/555 useless extension candidates. Maximal degree in co-relation 1453. Up to 170 conditions per place. [2024-05-12 12:54:55,727 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 47 selfloop transitions, 5 changer transitions 13/68 dead transitions. [2024-05-12 12:54:55,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 68 transitions, 314 flow [2024-05-12 12:54:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:54:55,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:54:55,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-05-12 12:54:55,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-05-12 12:54:55,729 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 93 flow. Second operand 6 states and 95 transitions. [2024-05-12 12:54:55,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 68 transitions, 314 flow [2024-05-12 12:54:55,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 68 transitions, 308 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-05-12 12:54:55,731 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 107 flow [2024-05-12 12:54:55,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=107, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2024-05-12 12:54:55,732 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2024-05-12 12:54:55,732 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 107 flow [2024-05-12 12:54:55,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:55,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:54:55,732 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:54:55,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-05-12 12:54:55,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-05-12 12:54:55,945 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:54:55,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:54:55,945 INFO L85 PathProgramCache]: Analyzing trace with hash -232243491, now seen corresponding path program 2 times [2024-05-12 12:54:55,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:54:55,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495915553] [2024-05-12 12:54:55,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:54:55,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:54:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:54:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:54:56,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:54:56,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495915553] [2024-05-12 12:54:56,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495915553] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:54:56,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484449162] [2024-05-12 12:54:56,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 12:54:56,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:54:56,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:54:56,028 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:54:56,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-05-12 12:54:56,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 12:54:56,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:54:56,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2024-05-12 12:54:56,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:54:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:54:56,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:54:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:54:56,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484449162] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:54:56,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:54:56,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2024-05-12 12:54:56,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500754731] [2024-05-12 12:54:56,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:54:56,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-05-12 12:54:56,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:54:56,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-05-12 12:54:56,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-05-12 12:54:56,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 12:54:56,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 107 flow. Second operand has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:56,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:54:56,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 12:54:56,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:54:56,603 INFO L124 PetriNetUnfolderBase]: 1037/1917 cut-off events. [2024-05-12 12:54:56,604 INFO L125 PetriNetUnfolderBase]: For 722/722 co-relation queries the response was YES. [2024-05-12 12:54:56,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4283 conditions, 1917 events. 1037/1917 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 11119 event pairs, 362 based on Foata normal form. 54/1639 useless extension candidates. Maximal degree in co-relation 3204. Up to 500 conditions per place. [2024-05-12 12:54:56,609 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 54 selfloop transitions, 9 changer transitions 46/112 dead transitions. [2024-05-12 12:54:56,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 112 transitions, 555 flow [2024-05-12 12:54:56,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:54:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:54:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-05-12 12:54:56,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117845117845118 [2024-05-12 12:54:56,610 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 107 flow. Second operand 9 states and 152 transitions. [2024-05-12 12:54:56,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 112 transitions, 555 flow [2024-05-12 12:54:56,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 112 transitions, 538 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-05-12 12:54:56,614 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 181 flow [2024-05-12 12:54:56,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=181, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2024-05-12 12:54:56,615 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2024-05-12 12:54:56,615 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 181 flow [2024-05-12 12:54:56,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:56,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:54:56,616 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:54:56,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-05-12 12:54:56,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-05-12 12:54:56,828 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:54:56,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:54:56,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1734230919, now seen corresponding path program 3 times [2024-05-12 12:54:56,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:54:56,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134444066] [2024-05-12 12:54:56,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:54:56,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:54:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:54:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:54:57,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:54:57,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134444066] [2024-05-12 12:54:57,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134444066] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:54:57,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301591642] [2024-05-12 12:54:57,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 12:54:57,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:54:57,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:54:57,145 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:54:57,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-05-12 12:54:57,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-05-12 12:54:57,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:54:57,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 23 conjunts are in the unsatisfiable core [2024-05-12 12:54:57,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:54:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:54:57,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:54:57,404 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 12:54:57,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-05-12 12:54:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:54:57,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301591642] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:54:57,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:54:57,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2024-05-12 12:54:57,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723612858] [2024-05-12 12:54:57,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:54:57,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-05-12 12:54:57,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:54:57,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-05-12 12:54:57,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-05-12 12:54:57,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 12:54:57,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 181 flow. Second operand has 20 states, 20 states have (on average 8.35) internal successors, (167), 20 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:57,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:54:57,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 12:54:57,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:54:58,420 INFO L124 PetriNetUnfolderBase]: 2353/4307 cut-off events. [2024-05-12 12:54:58,420 INFO L125 PetriNetUnfolderBase]: For 3296/3296 co-relation queries the response was YES. [2024-05-12 12:54:58,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10505 conditions, 4307 events. 2353/4307 cut-off events. For 3296/3296 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 28557 event pairs, 336 based on Foata normal form. 7/3587 useless extension candidates. Maximal degree in co-relation 7768. Up to 566 conditions per place. [2024-05-12 12:54:58,436 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 167 selfloop transitions, 33 changer transitions 66/269 dead transitions. [2024-05-12 12:54:58,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 269 transitions, 1453 flow [2024-05-12 12:54:58,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-05-12 12:54:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-05-12 12:54:58,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 364 transitions. [2024-05-12 12:54:58,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013774104683195 [2024-05-12 12:54:58,439 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 181 flow. Second operand 22 states and 364 transitions. [2024-05-12 12:54:58,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 269 transitions, 1453 flow [2024-05-12 12:54:58,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 269 transitions, 1415 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-05-12 12:54:58,445 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 511 flow [2024-05-12 12:54:58,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=511, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2024-05-12 12:54:58,446 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 40 predicate places. [2024-05-12 12:54:58,446 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 511 flow [2024-05-12 12:54:58,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.35) internal successors, (167), 20 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:58,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:54:58,447 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:54:58,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-05-12 12:54:58,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:54:58,658 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:54:58,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:54:58,659 INFO L85 PathProgramCache]: Analyzing trace with hash 2008475195, now seen corresponding path program 4 times [2024-05-12 12:54:58,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:54:58,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876317065] [2024-05-12 12:54:58,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:54:58,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:54:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:54:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:54:58,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:54:58,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876317065] [2024-05-12 12:54:58,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876317065] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:54:58,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806877893] [2024-05-12 12:54:58,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 12:54:58,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:54:58,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:54:58,957 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:54:58,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-05-12 12:54:59,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 12:54:59,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:54:59,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2024-05-12 12:54:59,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:54:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:54:59,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:54:59,206 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 12:54:59,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-05-12 12:54:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:54:59,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806877893] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:54:59,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:54:59,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-05-12 12:54:59,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601566179] [2024-05-12 12:54:59,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:54:59,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-05-12 12:54:59,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:54:59,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-05-12 12:54:59,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-05-12 12:54:59,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 12:54:59,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 511 flow. Second operand has 16 states, 16 states have (on average 9.5625) internal successors, (153), 16 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:59,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:54:59,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 12:54:59,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:55:00,106 INFO L124 PetriNetUnfolderBase]: 3321/6033 cut-off events. [2024-05-12 12:55:00,107 INFO L125 PetriNetUnfolderBase]: For 10479/10479 co-relation queries the response was YES. [2024-05-12 12:55:00,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16266 conditions, 6033 events. 3321/6033 cut-off events. For 10479/10479 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 41909 event pairs, 462 based on Foata normal form. 3/5019 useless extension candidates. Maximal degree in co-relation 13675. Up to 799 conditions per place. [2024-05-12 12:55:00,129 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 142 selfloop transitions, 40 changer transitions 40/225 dead transitions. [2024-05-12 12:55:00,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 225 transitions, 1559 flow [2024-05-12 12:55:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-05-12 12:55:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-05-12 12:55:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 262 transitions. [2024-05-12 12:55:00,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292929292929293 [2024-05-12 12:55:00,130 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 511 flow. Second operand 15 states and 262 transitions. [2024-05-12 12:55:00,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 225 transitions, 1559 flow [2024-05-12 12:55:00,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 225 transitions, 1412 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-05-12 12:55:00,155 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 629 flow [2024-05-12 12:55:00,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=629, PETRI_PLACES=83, PETRI_TRANSITIONS=74} [2024-05-12 12:55:00,156 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 51 predicate places. [2024-05-12 12:55:00,156 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 629 flow [2024-05-12 12:55:00,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.5625) internal successors, (153), 16 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:00,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:55:00,157 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:55:00,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-05-12 12:55:00,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:55:00,368 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:55:00,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:55:00,369 INFO L85 PathProgramCache]: Analyzing trace with hash -672779759, now seen corresponding path program 5 times [2024-05-12 12:55:00,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:55:00,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808208111] [2024-05-12 12:55:00,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:55:00,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:55:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:55:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:55:00,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:55:00,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808208111] [2024-05-12 12:55:00,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808208111] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:55:00,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710453599] [2024-05-12 12:55:00,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 12:55:00,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:55:00,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:55:00,465 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:55:00,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-05-12 12:55:00,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-05-12 12:55:00,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:55:00,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2024-05-12 12:55:00,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:55:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-05-12 12:55:00,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:55:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-05-12 12:55:00,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710453599] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:55:00,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:55:00,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2024-05-12 12:55:00,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678143561] [2024-05-12 12:55:00,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:55:00,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:55:00,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:55:00,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:55:00,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:55:00,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-05-12 12:55:00,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 629 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:00,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:55:00,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-05-12 12:55:00,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:55:01,580 INFO L124 PetriNetUnfolderBase]: 6355/11388 cut-off events. [2024-05-12 12:55:01,580 INFO L125 PetriNetUnfolderBase]: For 20226/20226 co-relation queries the response was YES. [2024-05-12 12:55:01,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30459 conditions, 11388 events. 6355/11388 cut-off events. For 20226/20226 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 87870 event pairs, 1635 based on Foata normal form. 70/9523 useless extension candidates. Maximal degree in co-relation 25568. Up to 3756 conditions per place. [2024-05-12 12:55:01,628 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 97 selfloop transitions, 56 changer transitions 0/156 dead transitions. [2024-05-12 12:55:01,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 156 transitions, 1484 flow [2024-05-12 12:55:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:55:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:55:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-05-12 12:55:01,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6606060606060606 [2024-05-12 12:55:01,629 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 629 flow. Second operand 5 states and 109 transitions. [2024-05-12 12:55:01,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 156 transitions, 1484 flow [2024-05-12 12:55:01,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 156 transitions, 1224 flow, removed 72 selfloop flow, removed 12 redundant places. [2024-05-12 12:55:01,656 INFO L231 Difference]: Finished difference. Result has 78 places, 111 transitions, 1063 flow [2024-05-12 12:55:01,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1063, PETRI_PLACES=78, PETRI_TRANSITIONS=111} [2024-05-12 12:55:01,658 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 46 predicate places. [2024-05-12 12:55:01,658 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 111 transitions, 1063 flow [2024-05-12 12:55:01,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:01,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:55:01,658 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:55:01,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-05-12 12:55:01,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-05-12 12:55:01,871 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:55:01,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:55:01,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2079671001, now seen corresponding path program 6 times [2024-05-12 12:55:01,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:55:01,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117344058] [2024-05-12 12:55:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:55:01,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:55:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:55:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:55:02,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:55:02,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117344058] [2024-05-12 12:55:02,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117344058] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:55:02,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226534429] [2024-05-12 12:55:02,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-05-12 12:55:02,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:55:02,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:55:02,028 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:55:02,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-05-12 12:55:02,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-05-12 12:55:02,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:55:02,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 27 conjunts are in the unsatisfiable core [2024-05-12 12:55:02,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:55:02,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-05-12 12:55:02,312 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-05-12 12:55:02,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-05-12 12:55:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-05-12 12:55:02,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:55:02,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2024-05-12 12:55:02,946 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-05-12 12:55:02,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 43 [2024-05-12 12:55:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-05-12 12:55:03,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226534429] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:55:03,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:55:03,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-05-12 12:55:03,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796615177] [2024-05-12 12:55:03,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:55:03,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-05-12 12:55:03,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:55:03,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-05-12 12:55:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2024-05-12 12:55:03,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 12:55:03,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 111 transitions, 1063 flow. Second operand has 22 states, 22 states have (on average 8.5) internal successors, (187), 22 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:03,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:55:03,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 12:55:03,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:55:04,362 INFO L124 PetriNetUnfolderBase]: 3985/7373 cut-off events. [2024-05-12 12:55:04,362 INFO L125 PetriNetUnfolderBase]: For 13880/13880 co-relation queries the response was YES. [2024-05-12 12:55:04,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19752 conditions, 7373 events. 3985/7373 cut-off events. For 13880/13880 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 53275 event pairs, 1512 based on Foata normal form. 100/6225 useless extension candidates. Maximal degree in co-relation 19632. Up to 4189 conditions per place. [2024-05-12 12:55:04,387 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 65 selfloop transitions, 9 changer transitions 87/164 dead transitions. [2024-05-12 12:55:04,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 164 transitions, 1277 flow [2024-05-12 12:55:04,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 12:55:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 12:55:04,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 179 transitions. [2024-05-12 12:55:04,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-05-12 12:55:04,389 INFO L175 Difference]: Start difference. First operand has 78 places, 111 transitions, 1063 flow. Second operand 12 states and 179 transitions. [2024-05-12 12:55:04,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 164 transitions, 1277 flow [2024-05-12 12:55:04,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 164 transitions, 1227 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-05-12 12:55:04,423 INFO L231 Difference]: Finished difference. Result has 88 places, 67 transitions, 572 flow [2024-05-12 12:55:04,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=572, PETRI_PLACES=88, PETRI_TRANSITIONS=67} [2024-05-12 12:55:04,423 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 56 predicate places. [2024-05-12 12:55:04,424 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 67 transitions, 572 flow [2024-05-12 12:55:04,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.5) internal successors, (187), 22 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:04,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:55:04,424 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:55:04,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-05-12 12:55:04,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:55:04,636 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:55:04,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:55:04,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1544487679, now seen corresponding path program 7 times [2024-05-12 12:55:04,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:55:04,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043105631] [2024-05-12 12:55:04,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:55:04,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:55:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:55:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:55:05,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:55:05,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043105631] [2024-05-12 12:55:05,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043105631] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:55:05,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079161528] [2024-05-12 12:55:05,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-05-12 12:55:05,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:55:05,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:55:05,039 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:55:05,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-05-12 12:55:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:55:05,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 16 conjunts are in the unsatisfiable core [2024-05-12 12:55:05,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:55:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-05-12 12:55:05,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:55:05,351 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 12:55:05,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-05-12 12:55:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-05-12 12:55:05,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079161528] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:55:05,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:55:05,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 24 [2024-05-12 12:55:05,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213000474] [2024-05-12 12:55:05,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:55:05,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-05-12 12:55:05,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:55:05,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-05-12 12:55:05,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2024-05-12 12:55:05,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 12:55:05,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 67 transitions, 572 flow. Second operand has 25 states, 25 states have (on average 8.48) internal successors, (212), 25 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:05,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:55:05,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 12:55:05,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:55:06,691 INFO L124 PetriNetUnfolderBase]: 4543/8159 cut-off events. [2024-05-12 12:55:06,691 INFO L125 PetriNetUnfolderBase]: For 11715/11715 co-relation queries the response was YES. [2024-05-12 12:55:06,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21610 conditions, 8159 events. 4543/8159 cut-off events. For 11715/11715 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 58886 event pairs, 303 based on Foata normal form. 20/6810 useless extension candidates. Maximal degree in co-relation 21577. Up to 1001 conditions per place. [2024-05-12 12:55:06,727 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 153 selfloop transitions, 64 changer transitions 86/306 dead transitions. [2024-05-12 12:55:06,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 306 transitions, 1956 flow [2024-05-12 12:55:06,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-05-12 12:55:06,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-05-12 12:55:06,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 399 transitions. [2024-05-12 12:55:06,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037878787878788 [2024-05-12 12:55:06,729 INFO L175 Difference]: Start difference. First operand has 88 places, 67 transitions, 572 flow. Second operand 24 states and 399 transitions. [2024-05-12 12:55:06,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 306 transitions, 1956 flow [2024-05-12 12:55:06,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 306 transitions, 1729 flow, removed 78 selfloop flow, removed 13 redundant places. [2024-05-12 12:55:06,783 INFO L231 Difference]: Finished difference. Result has 97 places, 89 transitions, 866 flow [2024-05-12 12:55:06,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=866, PETRI_PLACES=97, PETRI_TRANSITIONS=89} [2024-05-12 12:55:06,784 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 65 predicate places. [2024-05-12 12:55:06,784 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 866 flow [2024-05-12 12:55:06,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.48) internal successors, (212), 25 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:06,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:55:06,784 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:55:06,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-05-12 12:55:06,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:55:06,996 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:55:06,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:55:06,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1210377181, now seen corresponding path program 8 times [2024-05-12 12:55:06,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:55:06,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020402951] [2024-05-12 12:55:06,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:55:06,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:55:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:55:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-05-12 12:55:07,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:55:07,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020402951] [2024-05-12 12:55:07,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020402951] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:55:07,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34103727] [2024-05-12 12:55:07,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 12:55:07,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:55:07,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:55:07,159 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:55:07,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-05-12 12:55:07,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 12:55:07,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:55:07,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2024-05-12 12:55:07,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:55:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-05-12 12:55:07,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:55:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-05-12 12:55:07,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34103727] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:55:07,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:55:07,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-05-12 12:55:07,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313495416] [2024-05-12 12:55:07,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:55:07,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-05-12 12:55:07,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:55:07,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-05-12 12:55:07,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2024-05-12 12:55:07,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 12:55:07,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 866 flow. Second operand has 26 states, 26 states have (on average 8.26923076923077) internal successors, (215), 26 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:07,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:55:07,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 12:55:07,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:55:09,242 INFO L124 PetriNetUnfolderBase]: 8937/16419 cut-off events. [2024-05-12 12:55:09,243 INFO L125 PetriNetUnfolderBase]: For 22421/22421 co-relation queries the response was YES. [2024-05-12 12:55:09,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41541 conditions, 16419 events. 8937/16419 cut-off events. For 22421/22421 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 138666 event pairs, 5392 based on Foata normal form. 308/13941 useless extension candidates. Maximal degree in co-relation 41488. Up to 7560 conditions per place. [2024-05-12 12:55:09,306 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 80 selfloop transitions, 5 changer transitions 102/190 dead transitions. [2024-05-12 12:55:09,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 190 transitions, 1930 flow [2024-05-12 12:55:09,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 12:55:09,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 12:55:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-05-12 12:55:09,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121212121212121 [2024-05-12 12:55:09,311 INFO L175 Difference]: Start difference. First operand has 97 places, 89 transitions, 866 flow. Second operand 10 states and 136 transitions. [2024-05-12 12:55:09,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 190 transitions, 1930 flow [2024-05-12 12:55:09,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 190 transitions, 1686 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-05-12 12:55:09,392 INFO L231 Difference]: Finished difference. Result has 99 places, 88 transitions, 831 flow [2024-05-12 12:55:09,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=831, PETRI_PLACES=99, PETRI_TRANSITIONS=88} [2024-05-12 12:55:09,393 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 67 predicate places. [2024-05-12 12:55:09,393 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 88 transitions, 831 flow [2024-05-12 12:55:09,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.26923076923077) internal successors, (215), 26 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:09,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:55:09,394 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:55:09,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-05-12 12:55:09,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-05-12 12:55:09,607 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:55:09,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:55:09,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1719132527, now seen corresponding path program 9 times [2024-05-12 12:55:09,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:55:09,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947903586] [2024-05-12 12:55:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:55:09,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:55:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:55:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-05-12 12:55:09,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:55:09,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947903586] [2024-05-12 12:55:09,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947903586] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:55:09,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222465651] [2024-05-12 12:55:09,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 12:55:09,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:55:09,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:55:09,729 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:55:09,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-05-12 12:55:09,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-05-12 12:55:09,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:55:09,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2024-05-12 12:55:09,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:55:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-05-12 12:55:09,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:55:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-05-12 12:55:09,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222465651] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:55:09,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:55:09,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2024-05-12 12:55:09,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786325157] [2024-05-12 12:55:09,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:55:09,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:55:09,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:55:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:55:09,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:55:09,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-05-12 12:55:09,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 88 transitions, 831 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:09,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:55:09,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-05-12 12:55:09,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:55:11,435 INFO L124 PetriNetUnfolderBase]: 8486/15071 cut-off events. [2024-05-12 12:55:11,435 INFO L125 PetriNetUnfolderBase]: For 20791/20791 co-relation queries the response was YES. [2024-05-12 12:55:11,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38895 conditions, 15071 events. 8486/15071 cut-off events. For 20791/20791 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 119725 event pairs, 1627 based on Foata normal form. 28/12554 useless extension candidates. Maximal degree in co-relation 38842. Up to 3797 conditions per place. [2024-05-12 12:55:11,502 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 109 selfloop transitions, 83 changer transitions 0/195 dead transitions. [2024-05-12 12:55:11,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 195 transitions, 2033 flow [2024-05-12 12:55:11,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:55:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:55:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-05-12 12:55:11,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6717171717171717 [2024-05-12 12:55:11,508 INFO L175 Difference]: Start difference. First operand has 99 places, 88 transitions, 831 flow. Second operand 6 states and 133 transitions. [2024-05-12 12:55:11,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 195 transitions, 2033 flow [2024-05-12 12:55:11,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 195 transitions, 1853 flow, removed 85 selfloop flow, removed 9 redundant places. [2024-05-12 12:55:11,586 INFO L231 Difference]: Finished difference. Result has 92 places, 135 transitions, 1454 flow [2024-05-12 12:55:11,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1454, PETRI_PLACES=92, PETRI_TRANSITIONS=135} [2024-05-12 12:55:11,587 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 60 predicate places. [2024-05-12 12:55:11,587 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 135 transitions, 1454 flow [2024-05-12 12:55:11,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:11,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:55:11,587 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:55:11,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-05-12 12:55:11,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-05-12 12:55:11,814 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:55:11,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:55:11,815 INFO L85 PathProgramCache]: Analyzing trace with hash -563254901, now seen corresponding path program 10 times [2024-05-12 12:55:11,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:55:11,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735686827] [2024-05-12 12:55:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:55:11,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:55:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:55:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:55:12,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:55:12,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735686827] [2024-05-12 12:55:12,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735686827] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:55:12,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693894585] [2024-05-12 12:55:12,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 12:55:12,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:55:12,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:55:12,319 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:55:12,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-05-12 12:55:12,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 12:55:12,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:55:12,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2024-05-12 12:55:12,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:55:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-05-12 12:55:12,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:55:12,807 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 12:55:12,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-05-12 12:55:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 47 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-05-12 12:55:12,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693894585] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:55:12,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:55:12,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 10] total 32 [2024-05-12 12:55:12,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967411571] [2024-05-12 12:55:12,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:55:12,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-05-12 12:55:12,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:55:12,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-05-12 12:55:12,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2024-05-12 12:55:12,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 12:55:12,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 135 transitions, 1454 flow. Second operand has 33 states, 33 states have (on average 7.787878787878788) internal successors, (257), 33 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:12,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:55:12,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 12:55:12,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:55:16,595 INFO L124 PetriNetUnfolderBase]: 14298/25589 cut-off events. [2024-05-12 12:55:16,596 INFO L125 PetriNetUnfolderBase]: For 38219/38219 co-relation queries the response was YES. [2024-05-12 12:55:16,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67808 conditions, 25589 events. 14298/25589 cut-off events. For 38219/38219 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 217795 event pairs, 875 based on Foata normal form. 16/21321 useless extension candidates. Maximal degree in co-relation 67758. Up to 3282 conditions per place. [2024-05-12 12:55:16,730 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 400 selfloop transitions, 197 changer transitions 129/729 dead transitions. [2024-05-12 12:55:16,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 729 transitions, 5504 flow [2024-05-12 12:55:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-05-12 12:55:16,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-05-12 12:55:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 855 transitions. [2024-05-12 12:55:16,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287569573283859 [2024-05-12 12:55:16,732 INFO L175 Difference]: Start difference. First operand has 92 places, 135 transitions, 1454 flow. Second operand 49 states and 855 transitions. [2024-05-12 12:55:16,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 729 transitions, 5504 flow [2024-05-12 12:55:16,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 729 transitions, 5364 flow, removed 70 selfloop flow, removed 0 redundant places. [2024-05-12 12:55:16,826 INFO L231 Difference]: Finished difference. Result has 157 places, 234 transitions, 2924 flow [2024-05-12 12:55:16,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2924, PETRI_PLACES=157, PETRI_TRANSITIONS=234} [2024-05-12 12:55:16,827 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 125 predicate places. [2024-05-12 12:55:16,827 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 234 transitions, 2924 flow [2024-05-12 12:55:16,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.787878787878788) internal successors, (257), 33 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:16,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:55:16,827 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:55:16,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-05-12 12:55:17,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-05-12 12:55:17,039 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:55:17,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:55:17,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1686696389, now seen corresponding path program 11 times [2024-05-12 12:55:17,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:55:17,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366121880] [2024-05-12 12:55:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:55:17,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:55:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:55:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:55:17,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:55:17,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366121880] [2024-05-12 12:55:17,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366121880] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:55:17,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475668778] [2024-05-12 12:55:17,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 12:55:17,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:55:17,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:55:17,613 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:55:17,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-05-12 12:55:17,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-05-12 12:55:17,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:55:17,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2024-05-12 12:55:17,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:55:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-05-12 12:55:17,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:55:18,025 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 12:55:18,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-05-12 12:55:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-05-12 12:55:18,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475668778] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:55:18,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:55:18,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 31 [2024-05-12 12:55:18,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607161473] [2024-05-12 12:55:18,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:55:18,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-05-12 12:55:18,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:55:18,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-05-12 12:55:18,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2024-05-12 12:55:18,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 12:55:18,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 234 transitions, 2924 flow. Second operand has 32 states, 32 states have (on average 8.125) internal successors, (260), 32 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:18,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:55:18,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 12:55:18,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:55:23,164 INFO L124 PetriNetUnfolderBase]: 18068/32306 cut-off events. [2024-05-12 12:55:23,164 INFO L125 PetriNetUnfolderBase]: For 70532/70532 co-relation queries the response was YES. [2024-05-12 12:55:23,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89138 conditions, 32306 events. 18068/32306 cut-off events. For 70532/70532 co-relation queries the response was YES. Maximal size of possible extension queue 1280. Compared 285175 event pairs, 1095 based on Foata normal form. 1/26905 useless extension candidates. Maximal degree in co-relation 89066. Up to 4864 conditions per place. [2024-05-12 12:55:23,446 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 334 selfloop transitions, 270 changer transitions 100/707 dead transitions. [2024-05-12 12:55:23,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 707 transitions, 6670 flow [2024-05-12 12:55:23,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-05-12 12:55:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-05-12 12:55:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 694 transitions. [2024-05-12 12:55:23,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5129342202512934 [2024-05-12 12:55:23,470 INFO L175 Difference]: Start difference. First operand has 157 places, 234 transitions, 2924 flow. Second operand 41 states and 694 transitions. [2024-05-12 12:55:23,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 707 transitions, 6670 flow [2024-05-12 12:55:23,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 707 transitions, 6113 flow, removed 82 selfloop flow, removed 12 redundant places. [2024-05-12 12:55:23,857 INFO L231 Difference]: Finished difference. Result has 186 places, 294 transitions, 3615 flow [2024-05-12 12:55:23,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2429, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=3615, PETRI_PLACES=186, PETRI_TRANSITIONS=294} [2024-05-12 12:55:23,858 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 154 predicate places. [2024-05-12 12:55:23,858 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 294 transitions, 3615 flow [2024-05-12 12:55:23,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 8.125) internal successors, (260), 32 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:23,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:55:23,859 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:55:23,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-05-12 12:55:24,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-05-12 12:55:24,066 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:55:24,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:55:24,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1835647471, now seen corresponding path program 12 times [2024-05-12 12:55:24,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:55:24,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026900848] [2024-05-12 12:55:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:55:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:55:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:55:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:55:24,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:55:24,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026900848] [2024-05-12 12:55:24,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026900848] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:55:24,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542039010] [2024-05-12 12:55:24,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-05-12 12:55:24,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:55:24,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:55:24,604 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:55:24,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-05-12 12:55:24,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-05-12 12:55:24,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:55:24,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2024-05-12 12:55:24,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:55:24,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-05-12 12:55:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:55:25,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:55:25,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2024-05-12 12:55:25,717 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 12:55:25,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 47 [2024-05-12 12:55:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-05-12 12:55:25,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542039010] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:55:25,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:55:25,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 12] total 38 [2024-05-12 12:55:25,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569441415] [2024-05-12 12:55:25,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:55:25,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-05-12 12:55:25,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:55:25,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-05-12 12:55:25,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2024-05-12 12:55:25,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 12:55:25,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 294 transitions, 3615 flow. Second operand has 39 states, 39 states have (on average 7.666666666666667) internal successors, (299), 39 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:25,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:55:25,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 12:55:25,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:55:43,905 INFO L124 PetriNetUnfolderBase]: 59526/106365 cut-off events. [2024-05-12 12:55:43,906 INFO L125 PetriNetUnfolderBase]: For 258377/258377 co-relation queries the response was YES. [2024-05-12 12:55:45,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294081 conditions, 106365 events. 59526/106365 cut-off events. For 258377/258377 co-relation queries the response was YES. Maximal size of possible extension queue 2793. Compared 1056112 event pairs, 12328 based on Foata normal form. 71/88675 useless extension candidates. Maximal degree in co-relation 294009. Up to 19921 conditions per place. [2024-05-12 12:55:45,483 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 617 selfloop transitions, 610 changer transitions 263/1493 dead transitions. [2024-05-12 12:55:45,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 1493 transitions, 16238 flow [2024-05-12 12:55:45,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-05-12 12:55:45,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-05-12 12:55:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 993 transitions. [2024-05-12 12:55:45,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5279106858054227 [2024-05-12 12:55:45,486 INFO L175 Difference]: Start difference. First operand has 186 places, 294 transitions, 3615 flow. Second operand 57 states and 993 transitions. [2024-05-12 12:55:45,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 1493 transitions, 16238 flow [2024-05-12 12:55:47,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 1493 transitions, 15815 flow, removed 69 selfloop flow, removed 13 redundant places. [2024-05-12 12:55:47,878 INFO L231 Difference]: Finished difference. Result has 253 places, 797 transitions, 12843 flow [2024-05-12 12:55:47,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3465, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=12843, PETRI_PLACES=253, PETRI_TRANSITIONS=797} [2024-05-12 12:55:47,879 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 221 predicate places. [2024-05-12 12:55:47,879 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 797 transitions, 12843 flow [2024-05-12 12:55:47,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 7.666666666666667) internal successors, (299), 39 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:47,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:55:47,880 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:55:47,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-05-12 12:55:48,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-05-12 12:55:48,085 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:55:48,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:55:48,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2049287369, now seen corresponding path program 13 times [2024-05-12 12:55:48,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:55:48,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375360008] [2024-05-12 12:55:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:55:48,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:55:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:55:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:55:48,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:55:48,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375360008] [2024-05-12 12:55:48,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375360008] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:55:48,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521297910] [2024-05-12 12:55:48,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-05-12 12:55:48,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:55:48,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:55:48,501 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:55:48,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-05-12 12:55:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:55:48,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2024-05-12 12:55:48,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:55:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-05-12 12:55:48,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:55:48,898 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 12:55:48,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-05-12 12:55:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-05-12 12:55:48,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521297910] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:55:48,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:55:48,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 30 [2024-05-12 12:55:48,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824783968] [2024-05-12 12:55:48,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:55:48,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-05-12 12:55:48,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:55:48,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-05-12 12:55:48,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2024-05-12 12:55:48,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 12:55:48,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 797 transitions, 12843 flow. Second operand has 31 states, 31 states have (on average 8.225806451612904) internal successors, (255), 31 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:55:48,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:55:48,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 12:55:48,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand