./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/popl20-simple-array-sum.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c ./goblint.2024-06-19_11-23-25.files/protection/popl20-simple-array-sum.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-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:03:40,488 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:03:40,531 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:03:40,534 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:03:40,535 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:03:40,550 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:03:40,550 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:03:40,550 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:03:40,551 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:03:40,551 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:03:40,551 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:03:40,552 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:03:40,552 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:03:40,552 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:03:40,553 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:03:40,553 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:03:40,553 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:03:40,553 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:03:40,554 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:03:40,554 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:03:40,554 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:03:40,564 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:03:40,564 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:03:40,564 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:03:40,565 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:03:40,565 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:03:40,565 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:03:40,566 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:03:40,566 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:03:40,566 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:03:40,567 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:03:40,567 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:03:40,567 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:03:40,567 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:03:40,568 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:03:40,568 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:03:40,568 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:03:40,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:03:40,568 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:03:40,568 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:03:40,568 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:03:40,569 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:03:40,569 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:03:40,569 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:03:40,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:03:40,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:03:40,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:03:40,797 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:03:40,797 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:03:40,798 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/popl20-simple-array-sum.wvr.yml/witness.yml [2024-06-27 18:03:40,890 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:03:40,894 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:03:40,895 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2024-06-27 18:03:41,979 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:03:42,118 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:03:42,118 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2024-06-27 18:03:42,124 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60ac94688/ad9376dcbcd549aaa2c509141e1ca31f/FLAGa23a2b820 [2024-06-27 18:03:42,134 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60ac94688/ad9376dcbcd549aaa2c509141e1ca31f [2024-06-27 18:03:42,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:03:42,136 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:03:42,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:03:42,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:03:42,140 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:03:42,141 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:03:40" (1/2) ... [2024-06-27 18:03:42,142 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a5c3e70 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:42, skipping insertion in model container [2024-06-27 18:03:42,142 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:03:40" (1/2) ... [2024-06-27 18:03:42,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@28d32579 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:42, skipping insertion in model container [2024-06-27 18:03:42,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:03:42" (2/2) ... [2024-06-27 18:03:42,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a5c3e70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:42, skipping insertion in model container [2024-06-27 18:03:42,143 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:03:42" (2/2) ... [2024-06-27 18:03:42,144 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:03:42,166 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:03:42,167 INFO L97 edCorrectnessWitness]: Location invariant before [L98-L98] ! multithreaded || 0 <= p [2024-06-27 18:03:42,167 INFO L97 edCorrectnessWitness]: Location invariant before [L97-L97] ! multithreaded || 0 <= p [2024-06-27 18:03:42,167 INFO L97 edCorrectnessWitness]: Location invariant before [L96-L96] ! multithreaded || 0 <= p [2024-06-27 18:03:42,167 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:03:42,168 INFO L106 edCorrectnessWitness]: ghost_update [L95-L95] multithreaded = 1; [2024-06-27 18:03:42,187 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:03:42,351 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c[2729,2742] [2024-06-27 18:03:42,364 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:03:42,370 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:03:42,438 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c[2729,2742] [2024-06-27 18:03:42,449 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:03:42,461 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:03:42,462 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:42 WrapperNode [2024-06-27 18:03:42,462 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:03:42,462 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:03:42,462 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:03:42,463 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:03:42,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:42" (1/1) ... [2024-06-27 18:03:42,506 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:42" (1/1) ... [2024-06-27 18:03:42,547 INFO L138 Inliner]: procedures = 25, calls = 28, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 115 [2024-06-27 18:03:42,547 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:03:42,548 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:03:42,548 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:03:42,548 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:03:42,557 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:42" (1/1) ... [2024-06-27 18:03:42,557 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:42" (1/1) ... [2024-06-27 18:03:42,573 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:42" (1/1) ... [2024-06-27 18:03:42,610 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-06-27 18:03:42,610 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:42" (1/1) ... [2024-06-27 18:03:42,611 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:42" (1/1) ... [2024-06-27 18:03:42,620 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:42" (1/1) ... [2024-06-27 18:03:42,625 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:42" (1/1) ... [2024-06-27 18:03:42,628 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:42" (1/1) ... [2024-06-27 18:03:42,630 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:42" (1/1) ... [2024-06-27 18:03:42,633 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:03:42,635 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:03:42,635 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:03:42,635 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:03:42,636 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:42" (1/1) ... [2024-06-27 18:03:42,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:03:42,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:42,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 18:03:42,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 18:03:42,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:03:42,694 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 18:03:42,695 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 18:03:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 18:03:42,695 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 18:03:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 18:03:42,695 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 18:03:42,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:03:42,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:03:42,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:03:42,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:03:42,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:03:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:03:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 18:03:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:03:42,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:03:42,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:03:42,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:03:42,699 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 18:03:42,789 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:03:42,790 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:03:43,007 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:03:43,007 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:03:43,199 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:03:43,200 INFO L320 CfgBuilder]: Removed 5 assume(true) statements. [2024-06-27 18:03:43,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:03:43 BoogieIcfgContainer [2024-06-27 18:03:43,200 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:03:43,204 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:03:43,204 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:03:43,206 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:03:43,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:03:40" (1/4) ... [2024-06-27 18:03:43,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffd2a4e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:03:43, skipping insertion in model container [2024-06-27 18:03:43,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:03:42" (2/4) ... [2024-06-27 18:03:43,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffd2a4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:03:43, skipping insertion in model container [2024-06-27 18:03:43,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:42" (3/4) ... [2024-06-27 18:03:43,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffd2a4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:03:43, skipping insertion in model container [2024-06-27 18:03:43,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:03:43" (4/4) ... [2024-06-27 18:03:43,211 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2024-06-27 18:03:43,224 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:03:43,224 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 18:03:43,224 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:03:43,274 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 18:03:43,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 45 transitions, 111 flow [2024-06-27 18:03:43,330 INFO L124 PetriNetUnfolderBase]: 6/42 cut-off events. [2024-06-27 18:03:43,330 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 18:03:43,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 42 events. 6/42 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 55 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-06-27 18:03:43,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 45 transitions, 111 flow [2024-06-27 18:03:43,338 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 41 transitions, 100 flow [2024-06-27 18:03:43,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:03:43,362 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;@48b5df12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:03:43,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 18:03:43,369 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:03:43,369 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-06-27 18:03:43,369 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:03:43,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:43,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:43,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:03:43,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:43,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1144066673, now seen corresponding path program 1 times [2024-06-27 18:03:43,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:43,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859428462] [2024-06-27 18:03:43,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:43,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:43,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:43,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859428462] [2024-06-27 18:03:43,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859428462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:43,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:43,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:03:43,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825806089] [2024-06-27 18:03:43,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:43,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:03:43,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:43,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:03:43,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:03:43,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-27 18:03:43,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:43,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:43,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-27 18:03:43,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:43,981 INFO L124 PetriNetUnfolderBase]: 996/1568 cut-off events. [2024-06-27 18:03:43,981 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-06-27 18:03:43,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3075 conditions, 1568 events. 996/1568 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7119 event pairs, 333 based on Foata normal form. 60/1437 useless extension candidates. Maximal degree in co-relation 2724. Up to 877 conditions per place. [2024-06-27 18:03:43,996 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 47 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-06-27 18:03:43,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 244 flow [2024-06-27 18:03:43,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:03:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:03:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-27 18:03:44,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-27 18:03:44,009 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 100 flow. Second operand 3 states and 88 transitions. [2024-06-27 18:03:44,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 244 flow [2024-06-27 18:03:44,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 58 transitions, 224 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 18:03:44,019 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 100 flow [2024-06-27 18:03:44,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2024-06-27 18:03:44,023 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2024-06-27 18:03:44,024 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 100 flow [2024-06-27 18:03:44,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:44,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:44,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:44,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:03:44,025 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:03:44,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:44,026 INFO L85 PathProgramCache]: Analyzing trace with hash 158101741, now seen corresponding path program 1 times [2024-06-27 18:03:44,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:44,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572650582] [2024-06-27 18:03:44,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:44,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:44,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:44,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572650582] [2024-06-27 18:03:44,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572650582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:44,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:44,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:03:44,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621457190] [2024-06-27 18:03:44,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:44,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:03:44,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:44,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:03:44,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:03:44,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-27 18:03:44,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:44,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:44,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-27 18:03:44,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:44,423 INFO L124 PetriNetUnfolderBase]: 1412/2201 cut-off events. [2024-06-27 18:03:44,423 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2024-06-27 18:03:44,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4474 conditions, 2201 events. 1412/2201 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10269 event pairs, 407 based on Foata normal form. 72/2033 useless extension candidates. Maximal degree in co-relation 1188. Up to 877 conditions per place. [2024-06-27 18:03:44,435 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 60 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2024-06-27 18:03:44,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 74 transitions, 304 flow [2024-06-27 18:03:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:03:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:03:44,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-27 18:03:44,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 18:03:44,439 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 100 flow. Second operand 4 states and 117 transitions. [2024-06-27 18:03:44,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 74 transitions, 304 flow [2024-06-27 18:03:44,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 74 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:03:44,445 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 138 flow [2024-06-27 18:03:44,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2024-06-27 18:03:44,447 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-27 18:03:44,447 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 138 flow [2024-06-27 18:03:44,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:44,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:44,452 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:44,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:03:44,452 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:03:44,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:44,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1376216816, now seen corresponding path program 1 times [2024-06-27 18:03:44,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:44,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095350090] [2024-06-27 18:03:44,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:44,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:44,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:44,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095350090] [2024-06-27 18:03:44,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095350090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:44,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:44,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:03:44,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000161973] [2024-06-27 18:03:44,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:44,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:03:44,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:44,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:03:44,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:03:44,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2024-06-27 18:03:44,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:44,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:44,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2024-06-27 18:03:44,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:44,854 INFO L124 PetriNetUnfolderBase]: 1607/2713 cut-off events. [2024-06-27 18:03:44,854 INFO L125 PetriNetUnfolderBase]: For 944/959 co-relation queries the response was YES. [2024-06-27 18:03:44,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5854 conditions, 2713 events. 1607/2713 cut-off events. For 944/959 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 14100 event pairs, 1115 based on Foata normal form. 44/2420 useless extension candidates. Maximal degree in co-relation 2667. Up to 1813 conditions per place. [2024-06-27 18:03:44,868 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 62 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-27 18:03:44,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 85 transitions, 380 flow [2024-06-27 18:03:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:03:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:03:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-27 18:03:44,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962962962962963 [2024-06-27 18:03:44,870 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 138 flow. Second operand 6 states and 161 transitions. [2024-06-27 18:03:44,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 85 transitions, 380 flow [2024-06-27 18:03:44,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 85 transitions, 378 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:03:44,873 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 212 flow [2024-06-27 18:03:44,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-06-27 18:03:44,873 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-27 18:03:44,874 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 212 flow [2024-06-27 18:03:44,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:44,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:44,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:44,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:03:44,874 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:03:44,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:44,875 INFO L85 PathProgramCache]: Analyzing trace with hash 626391807, now seen corresponding path program 1 times [2024-06-27 18:03:44,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:44,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824056234] [2024-06-27 18:03:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:44,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:44,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:44,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824056234] [2024-06-27 18:03:44,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824056234] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:44,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332254359] [2024-06-27 18:03:44,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:44,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:44,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:44,940 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) [2024-06-27 18:03:44,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 18:03:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:45,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:03:45,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:45,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:45,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332254359] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:45,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:45,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2024-06-27 18:03:45,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740492624] [2024-06-27 18:03:45,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:45,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:03:45,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:45,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:03:45,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:03:45,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-27 18:03:45,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 212 flow. Second operand has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:45,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:45,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-27 18:03:45,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:45,728 INFO L124 PetriNetUnfolderBase]: 2498/3809 cut-off events. [2024-06-27 18:03:45,729 INFO L125 PetriNetUnfolderBase]: For 1997/1997 co-relation queries the response was YES. [2024-06-27 18:03:45,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9137 conditions, 3809 events. 2498/3809 cut-off events. For 1997/1997 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18656 event pairs, 491 based on Foata normal form. 134/3533 useless extension candidates. Maximal degree in co-relation 5036. Up to 709 conditions per place. [2024-06-27 18:03:45,755 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 130 selfloop transitions, 28 changer transitions 0/166 dead transitions. [2024-06-27 18:03:45,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 166 transitions, 828 flow [2024-06-27 18:03:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:03:45,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:03:45,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 302 transitions. [2024-06-27 18:03:45,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162393162393163 [2024-06-27 18:03:45,759 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 212 flow. Second operand 13 states and 302 transitions. [2024-06-27 18:03:45,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 166 transitions, 828 flow [2024-06-27 18:03:45,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 166 transitions, 826 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 18:03:45,768 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 348 flow [2024-06-27 18:03:45,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=348, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-27 18:03:45,770 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-27 18:03:45,770 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 348 flow [2024-06-27 18:03:45,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:45,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:45,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:45,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-27 18:03:45,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:45,984 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:03:45,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:45,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2108797660, now seen corresponding path program 1 times [2024-06-27 18:03:45,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:45,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766977687] [2024-06-27 18:03:45,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:45,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:46,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:46,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766977687] [2024-06-27 18:03:46,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766977687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:46,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:46,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:03:46,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918577550] [2024-06-27 18:03:46,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:46,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:03:46,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:46,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:03:46,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:03:46,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 18:03:46,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 348 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:46,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:46,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 18:03:46,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:46,516 INFO L124 PetriNetUnfolderBase]: 1936/3311 cut-off events. [2024-06-27 18:03:46,517 INFO L125 PetriNetUnfolderBase]: For 4552/4610 co-relation queries the response was YES. [2024-06-27 18:03:46,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8324 conditions, 3311 events. 1936/3311 cut-off events. For 4552/4610 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 18386 event pairs, 1364 based on Foata normal form. 1/2883 useless extension candidates. Maximal degree in co-relation 5154. Up to 2476 conditions per place. [2024-06-27 18:03:46,536 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 68 selfloop transitions, 5 changer transitions 1/86 dead transitions. [2024-06-27 18:03:46,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 86 transitions, 598 flow [2024-06-27 18:03:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:03:46,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:03:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-06-27 18:03:46,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 18:03:46,538 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 348 flow. Second operand 4 states and 116 transitions. [2024-06-27 18:03:46,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 86 transitions, 598 flow [2024-06-27 18:03:46,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 86 transitions, 530 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 18:03:46,544 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 317 flow [2024-06-27 18:03:46,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=317, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-27 18:03:46,545 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-27 18:03:46,545 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 317 flow [2024-06-27 18:03:46,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:46,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:46,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:46,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:03:46,546 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:03:46,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:46,546 INFO L85 PathProgramCache]: Analyzing trace with hash 9804745, now seen corresponding path program 1 times [2024-06-27 18:03:46,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:46,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72283809] [2024-06-27 18:03:46,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:46,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:46,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:46,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72283809] [2024-06-27 18:03:46,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72283809] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:46,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963770649] [2024-06-27 18:03:46,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:46,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:46,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:46,624 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) [2024-06-27 18:03:46,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 18:03:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:46,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:03:46,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:46,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:46,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963770649] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:46,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 18:03:46,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-06-27 18:03:46,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039758485] [2024-06-27 18:03:46,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:46,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:03:46,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:46,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:03:46,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:03:46,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 18:03:46,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 317 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:46,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:46,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 18:03:46,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:47,093 INFO L124 PetriNetUnfolderBase]: 2382/4078 cut-off events. [2024-06-27 18:03:47,094 INFO L125 PetriNetUnfolderBase]: For 4340/4383 co-relation queries the response was YES. [2024-06-27 18:03:47,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10522 conditions, 4078 events. 2382/4078 cut-off events. For 4340/4383 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 23649 event pairs, 1785 based on Foata normal form. 2/3914 useless extension candidates. Maximal degree in co-relation 7098. Up to 2722 conditions per place. [2024-06-27 18:03:47,112 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 66 selfloop transitions, 8 changer transitions 0/86 dead transitions. [2024-06-27 18:03:47,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 529 flow [2024-06-27 18:03:47,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:03:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:03:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-27 18:03:47,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 18:03:47,114 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 317 flow. Second operand 5 states and 135 transitions. [2024-06-27 18:03:47,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 529 flow [2024-06-27 18:03:47,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 86 transitions, 521 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 18:03:47,120 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 311 flow [2024-06-27 18:03:47,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=311, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2024-06-27 18:03:47,120 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2024-06-27 18:03:47,121 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 311 flow [2024-06-27 18:03:47,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:47,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:47,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:47,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:47,332 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,SelfDestructingSolverStorable5 [2024-06-27 18:03:47,333 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:03:47,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:47,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1809063150, now seen corresponding path program 1 times [2024-06-27 18:03:47,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:47,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176473191] [2024-06-27 18:03:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:47,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:47,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:47,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176473191] [2024-06-27 18:03:47,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176473191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:47,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:47,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:03:47,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55718215] [2024-06-27 18:03:47,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:47,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:03:47,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:03:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:03:47,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 18:03:47,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 311 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:47,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:47,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 18:03:47,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:47,743 INFO L124 PetriNetUnfolderBase]: 2079/3678 cut-off events. [2024-06-27 18:03:47,744 INFO L125 PetriNetUnfolderBase]: For 3903/3967 co-relation queries the response was YES. [2024-06-27 18:03:47,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8969 conditions, 3678 events. 2079/3678 cut-off events. For 3903/3967 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22200 event pairs, 1374 based on Foata normal form. 96/3582 useless extension candidates. Maximal degree in co-relation 5856. Up to 2038 conditions per place. [2024-06-27 18:03:47,772 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 75 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2024-06-27 18:03:47,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 98 transitions, 603 flow [2024-06-27 18:03:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:03:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:03:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-27 18:03:47,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 18:03:47,774 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 311 flow. Second operand 6 states and 165 transitions. [2024-06-27 18:03:47,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 98 transitions, 603 flow [2024-06-27 18:03:47,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 98 transitions, 588 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 18:03:47,780 INFO L231 Difference]: Finished difference. Result has 74 places, 64 transitions, 330 flow [2024-06-27 18:03:47,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=330, PETRI_PLACES=74, PETRI_TRANSITIONS=64} [2024-06-27 18:03:47,781 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 29 predicate places. [2024-06-27 18:03:47,781 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 64 transitions, 330 flow [2024-06-27 18:03:47,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:47,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:47,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:47,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:03:47,782 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:03:47,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:47,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2055815495, now seen corresponding path program 1 times [2024-06-27 18:03:47,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:47,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560280836] [2024-06-27 18:03:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:47,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:47,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:47,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560280836] [2024-06-27 18:03:47,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560280836] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:47,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065867123] [2024-06-27 18:03:47,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:47,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:47,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:47,879 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) [2024-06-27 18:03:47,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 18:03:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:47,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 18:03:47,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:47,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:48,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065867123] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:48,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 18:03:48,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-06-27 18:03:48,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671339903] [2024-06-27 18:03:48,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:48,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:03:48,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:48,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:03:48,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:03:48,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 18:03:48,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:48,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:48,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 18:03:48,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:48,343 INFO L124 PetriNetUnfolderBase]: 2375/4054 cut-off events. [2024-06-27 18:03:48,343 INFO L125 PetriNetUnfolderBase]: For 5331/5412 co-relation queries the response was YES. [2024-06-27 18:03:48,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11189 conditions, 4054 events. 2375/4054 cut-off events. For 5331/5412 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 24114 event pairs, 1386 based on Foata normal form. 249/4100 useless extension candidates. Maximal degree in co-relation 6697. Up to 2153 conditions per place. [2024-06-27 18:03:48,365 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 85 selfloop transitions, 5 changer transitions 8/110 dead transitions. [2024-06-27 18:03:48,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 110 transitions, 718 flow [2024-06-27 18:03:48,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:03:48,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:03:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 18:03:48,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6622222222222223 [2024-06-27 18:03:48,366 INFO L175 Difference]: Start difference. First operand has 74 places, 64 transitions, 330 flow. Second operand 5 states and 149 transitions. [2024-06-27 18:03:48,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 110 transitions, 718 flow [2024-06-27 18:03:48,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 110 transitions, 702 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:03:48,371 INFO L231 Difference]: Finished difference. Result has 77 places, 64 transitions, 333 flow [2024-06-27 18:03:48,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=77, PETRI_TRANSITIONS=64} [2024-06-27 18:03:48,374 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2024-06-27 18:03:48,374 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 64 transitions, 333 flow [2024-06-27 18:03:48,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:48,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:48,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:48,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:48,586 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 [2024-06-27 18:03:48,587 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:03:48,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:48,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1603182821, now seen corresponding path program 1 times [2024-06-27 18:03:48,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:48,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600584972] [2024-06-27 18:03:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:48,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:48,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:48,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600584972] [2024-06-27 18:03:48,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600584972] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:48,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050920519] [2024-06-27 18:03:48,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:48,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:48,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:48,673 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) [2024-06-27 18:03:48,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 18:03:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:48,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 18:03:48,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:48,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:48,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050920519] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:48,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 18:03:48,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-06-27 18:03:48,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219240463] [2024-06-27 18:03:48,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:48,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:03:48,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:48,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:03:48,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:03:48,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2024-06-27 18:03:48,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 64 transitions, 333 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:48,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:48,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2024-06-27 18:03:48,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:49,143 INFO L124 PetriNetUnfolderBase]: 2627/4272 cut-off events. [2024-06-27 18:03:49,143 INFO L125 PetriNetUnfolderBase]: For 9427/9427 co-relation queries the response was YES. [2024-06-27 18:03:49,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13405 conditions, 4272 events. 2627/4272 cut-off events. For 9427/9427 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 23595 event pairs, 1080 based on Foata normal form. 114/4245 useless extension candidates. Maximal degree in co-relation 8250. Up to 1808 conditions per place. [2024-06-27 18:03:49,169 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 72 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-06-27 18:03:49,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 92 transitions, 581 flow [2024-06-27 18:03:49,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:03:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:03:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-27 18:03:49,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-06-27 18:03:49,170 INFO L175 Difference]: Start difference. First operand has 77 places, 64 transitions, 333 flow. Second operand 5 states and 141 transitions. [2024-06-27 18:03:49,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 92 transitions, 581 flow [2024-06-27 18:03:49,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 552 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 18:03:49,177 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 329 flow [2024-06-27 18:03:49,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=329, PETRI_PLACES=78, PETRI_TRANSITIONS=63} [2024-06-27 18:03:49,178 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-27 18:03:49,178 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 329 flow [2024-06-27 18:03:49,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:49,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:49,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:49,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:49,390 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 [2024-06-27 18:03:49,390 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:03:49,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:49,390 INFO L85 PathProgramCache]: Analyzing trace with hash 979528591, now seen corresponding path program 1 times [2024-06-27 18:03:49,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:49,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112103377] [2024-06-27 18:03:49,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:49,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:49,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:49,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112103377] [2024-06-27 18:03:49,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112103377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:49,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:49,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:03:49,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438311179] [2024-06-27 18:03:49,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:49,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:03:49,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:49,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:03:49,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:03:49,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2024-06-27 18:03:49,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 63 transitions, 329 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:49,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:49,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2024-06-27 18:03:49,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:49,763 INFO L124 PetriNetUnfolderBase]: 2096/3561 cut-off events. [2024-06-27 18:03:49,763 INFO L125 PetriNetUnfolderBase]: For 6199/6199 co-relation queries the response was YES. [2024-06-27 18:03:49,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10150 conditions, 3561 events. 2096/3561 cut-off events. For 6199/6199 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20080 event pairs, 1586 based on Foata normal form. 0/3279 useless extension candidates. Maximal degree in co-relation 6464. Up to 2702 conditions per place. [2024-06-27 18:03:49,782 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 38 selfloop transitions, 6 changer transitions 26/82 dead transitions. [2024-06-27 18:03:49,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 82 transitions, 535 flow [2024-06-27 18:03:49,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:03:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:03:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 18:03:49,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2024-06-27 18:03:49,784 INFO L175 Difference]: Start difference. First operand has 78 places, 63 transitions, 329 flow. Second operand 6 states and 148 transitions. [2024-06-27 18:03:49,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 82 transitions, 535 flow [2024-06-27 18:03:49,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 513 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 18:03:49,789 INFO L231 Difference]: Finished difference. Result has 81 places, 56 transitions, 275 flow [2024-06-27 18:03:49,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=81, PETRI_TRANSITIONS=56} [2024-06-27 18:03:49,790 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 36 predicate places. [2024-06-27 18:03:49,790 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 56 transitions, 275 flow [2024-06-27 18:03:49,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:49,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:49,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:49,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:03:49,791 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:03:49,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:49,791 INFO L85 PathProgramCache]: Analyzing trace with hash -735217014, now seen corresponding path program 1 times [2024-06-27 18:03:49,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:49,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854720375] [2024-06-27 18:03:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:49,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:49,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:49,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854720375] [2024-06-27 18:03:49,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854720375] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:49,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47781930] [2024-06-27 18:03:49,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:49,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:49,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:49,868 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) [2024-06-27 18:03:49,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 18:03:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:49,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 18:03:49,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:49,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:50,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47781930] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:50,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 18:03:50,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-06-27 18:03:50,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372072982] [2024-06-27 18:03:50,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:50,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:03:50,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:50,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:03:50,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:03:50,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2024-06-27 18:03:50,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 56 transitions, 275 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:50,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:50,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2024-06-27 18:03:50,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:50,348 INFO L124 PetriNetUnfolderBase]: 2246/3885 cut-off events. [2024-06-27 18:03:50,348 INFO L125 PetriNetUnfolderBase]: For 5425/5425 co-relation queries the response was YES. [2024-06-27 18:03:50,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10792 conditions, 3885 events. 2246/3885 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 23212 event pairs, 956 based on Foata normal form. 129/3766 useless extension candidates. Maximal degree in co-relation 6914. Up to 1688 conditions per place. [2024-06-27 18:03:50,373 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 56 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-06-27 18:03:50,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 489 flow [2024-06-27 18:03:50,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:03:50,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:03:50,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-27 18:03:50,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-27 18:03:50,375 INFO L175 Difference]: Start difference. First operand has 81 places, 56 transitions, 275 flow. Second operand 5 states and 117 transitions. [2024-06-27 18:03:50,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 489 flow [2024-06-27 18:03:50,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 450 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 18:03:50,383 INFO L231 Difference]: Finished difference. Result has 70 places, 57 transitions, 267 flow [2024-06-27 18:03:50,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=70, PETRI_TRANSITIONS=57} [2024-06-27 18:03:50,384 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2024-06-27 18:03:50,384 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 57 transitions, 267 flow [2024-06-27 18:03:50,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:50,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:50,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:50,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:50,596 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,SelfDestructingSolverStorable10 [2024-06-27 18:03:50,597 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:03:50,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:50,597 INFO L85 PathProgramCache]: Analyzing trace with hash 267220933, now seen corresponding path program 1 times [2024-06-27 18:03:50,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:50,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172569704] [2024-06-27 18:03:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:50,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:50,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:50,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172569704] [2024-06-27 18:03:50,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172569704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:50,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:50,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:03:50,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530486474] [2024-06-27 18:03:50,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:50,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:03:50,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:50,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:03:50,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:03:50,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2024-06-27 18:03:50,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 57 transitions, 267 flow. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:50,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:50,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2024-06-27 18:03:50,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:51,074 INFO L124 PetriNetUnfolderBase]: 2013/3287 cut-off events. [2024-06-27 18:03:51,074 INFO L125 PetriNetUnfolderBase]: For 3272/3272 co-relation queries the response was YES. [2024-06-27 18:03:51,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9354 conditions, 3287 events. 2013/3287 cut-off events. For 3272/3272 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 16362 event pairs, 341 based on Foata normal form. 119/3399 useless extension candidates. Maximal degree in co-relation 6771. Up to 1231 conditions per place. [2024-06-27 18:03:51,087 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 86 selfloop transitions, 16 changer transitions 20/130 dead transitions. [2024-06-27 18:03:51,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 130 transitions, 806 flow [2024-06-27 18:03:51,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:03:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:03:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 18:03:51,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-27 18:03:51,088 INFO L175 Difference]: Start difference. First operand has 70 places, 57 transitions, 267 flow. Second operand 8 states and 171 transitions. [2024-06-27 18:03:51,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 130 transitions, 806 flow [2024-06-27 18:03:51,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 130 transitions, 798 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:03:51,093 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 319 flow [2024-06-27 18:03:51,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=319, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2024-06-27 18:03:51,094 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2024-06-27 18:03:51,094 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 319 flow [2024-06-27 18:03:51,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:51,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:51,095 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:51,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:03:51,095 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:03:51,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:51,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1187788515, now seen corresponding path program 2 times [2024-06-27 18:03:51,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:51,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113023532] [2024-06-27 18:03:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:51,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 18:03:51,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:51,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113023532] [2024-06-27 18:03:51,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113023532] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:51,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020044330] [2024-06-27 18:03:51,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:03:51,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:51,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:51,182 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) [2024-06-27 18:03:51,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 18:03:51,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:03:51,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:51,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:03:51,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:51,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:51,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020044330] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:51,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:51,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-06-27 18:03:51,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73697029] [2024-06-27 18:03:51,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:51,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 18:03:51,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:51,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 18:03:51,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-06-27 18:03:51,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2024-06-27 18:03:51,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 319 flow. Second operand has 15 states, 15 states have (on average 19.266666666666666) internal successors, (289), 15 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:51,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:51,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2024-06-27 18:03:51,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:51,925 INFO L124 PetriNetUnfolderBase]: 1878/3395 cut-off events. [2024-06-27 18:03:51,925 INFO L125 PetriNetUnfolderBase]: For 4462/4462 co-relation queries the response was YES. [2024-06-27 18:03:51,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10064 conditions, 3395 events. 1878/3395 cut-off events. For 4462/4462 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 18759 event pairs, 255 based on Foata normal form. 188/3525 useless extension candidates. Maximal degree in co-relation 10018. Up to 573 conditions per place. [2024-06-27 18:03:51,946 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 130 selfloop transitions, 39 changer transitions 0/187 dead transitions. [2024-06-27 18:03:51,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 187 transitions, 1264 flow [2024-06-27 18:03:51,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 18:03:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 18:03:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 424 transitions. [2024-06-27 18:03:51,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234567901234568 [2024-06-27 18:03:51,949 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 319 flow. Second operand 18 states and 424 transitions. [2024-06-27 18:03:51,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 187 transitions, 1264 flow [2024-06-27 18:03:51,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 187 transitions, 1236 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 18:03:51,995 INFO L231 Difference]: Finished difference. Result has 92 places, 87 transitions, 601 flow [2024-06-27 18:03:51,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=601, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2024-06-27 18:03:51,996 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2024-06-27 18:03:51,996 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 601 flow [2024-06-27 18:03:51,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 19.266666666666666) internal successors, (289), 15 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:51,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:51,997 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2024-06-27 18:03:52,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:52,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:52,204 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:03:52,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:52,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1006929772, now seen corresponding path program 3 times [2024-06-27 18:03:52,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:52,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761474947] [2024-06-27 18:03:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:52,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-06-27 18:03:52,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:52,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761474947] [2024-06-27 18:03:52,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761474947] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:52,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784002405] [2024-06-27 18:03:52,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:03:52,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:52,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:52,379 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) [2024-06-27 18:03:52,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 18:03:52,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 18:03:52,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:52,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:03:52,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-06-27 18:03:52,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-06-27 18:03:52,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784002405] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:52,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:52,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 15 [2024-06-27 18:03:52,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615677997] [2024-06-27 18:03:52,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:52,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 18:03:52,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:52,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 18:03:52,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-06-27 18:03:52,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 45 [2024-06-27 18:03:52,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 601 flow. Second operand has 15 states, 15 states have (on average 12.466666666666667) internal successors, (187), 15 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) [2024-06-27 18:03:52,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:52,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 45 [2024-06-27 18:03:52,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:54,414 INFO L124 PetriNetUnfolderBase]: 8156/12055 cut-off events. [2024-06-27 18:03:54,414 INFO L125 PetriNetUnfolderBase]: For 44502/44502 co-relation queries the response was YES. [2024-06-27 18:03:54,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46127 conditions, 12055 events. 8156/12055 cut-off events. For 44502/44502 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 62507 event pairs, 562 based on Foata normal form. 337/12372 useless extension candidates. Maximal degree in co-relation 46071. Up to 3580 conditions per place. [2024-06-27 18:03:54,497 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 443 selfloop transitions, 93 changer transitions 11/557 dead transitions. [2024-06-27 18:03:54,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 557 transitions, 4817 flow [2024-06-27 18:03:54,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-27 18:03:54,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-27 18:03:54,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 707 transitions. [2024-06-27 18:03:54,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41345029239766085 [2024-06-27 18:03:54,501 INFO L175 Difference]: Start difference. First operand has 92 places, 87 transitions, 601 flow. Second operand 38 states and 707 transitions. [2024-06-27 18:03:54,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 557 transitions, 4817 flow [2024-06-27 18:03:54,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 557 transitions, 4469 flow, removed 119 selfloop flow, removed 5 redundant places. [2024-06-27 18:03:54,580 INFO L231 Difference]: Finished difference. Result has 146 places, 172 transitions, 1457 flow [2024-06-27 18:03:54,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1457, PETRI_PLACES=146, PETRI_TRANSITIONS=172} [2024-06-27 18:03:54,581 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 101 predicate places. [2024-06-27 18:03:54,581 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 172 transitions, 1457 flow [2024-06-27 18:03:54,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.466666666666667) internal successors, (187), 15 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) [2024-06-27 18:03:54,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:54,582 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2024-06-27 18:03:54,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:54,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:54,794 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:03:54,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:54,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2033716522, now seen corresponding path program 4 times [2024-06-27 18:03:54,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:54,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255578255] [2024-06-27 18:03:54,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:54,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-06-27 18:03:54,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:54,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255578255] [2024-06-27 18:03:54,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255578255] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:54,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263240297] [2024-06-27 18:03:54,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:03:54,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:54,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:54,954 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) [2024-06-27 18:03:54,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 18:03:55,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:03:55,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:55,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:03:55,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-06-27 18:03:55,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-06-27 18:03:55,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263240297] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:55,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:55,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-06-27 18:03:55,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754935374] [2024-06-27 18:03:55,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:55,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:03:55,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:55,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:03:55,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:03:55,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 45 [2024-06-27 18:03:55,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 172 transitions, 1457 flow. Second operand has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 14 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:55,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:55,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 45 [2024-06-27 18:03:55,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:57,430 INFO L124 PetriNetUnfolderBase]: 9984/14819 cut-off events. [2024-06-27 18:03:57,430 INFO L125 PetriNetUnfolderBase]: For 103529/103573 co-relation queries the response was YES. [2024-06-27 18:03:57,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69454 conditions, 14819 events. 9984/14819 cut-off events. For 103529/103573 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 80446 event pairs, 956 based on Foata normal form. 134/14928 useless extension candidates. Maximal degree in co-relation 69367. Up to 5542 conditions per place. [2024-06-27 18:03:57,554 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 322 selfloop transitions, 124 changer transitions 11/467 dead transitions. [2024-06-27 18:03:57,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 467 transitions, 4536 flow [2024-06-27 18:03:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 18:03:57,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 18:03:57,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 469 transitions. [2024-06-27 18:03:57,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41688888888888886 [2024-06-27 18:03:57,558 INFO L175 Difference]: Start difference. First operand has 146 places, 172 transitions, 1457 flow. Second operand 25 states and 469 transitions. [2024-06-27 18:03:57,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 467 transitions, 4536 flow [2024-06-27 18:03:57,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 467 transitions, 4196 flow, removed 112 selfloop flow, removed 9 redundant places. [2024-06-27 18:03:57,799 INFO L231 Difference]: Finished difference. Result has 174 places, 232 transitions, 2221 flow [2024-06-27 18:03:57,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2221, PETRI_PLACES=174, PETRI_TRANSITIONS=232} [2024-06-27 18:03:57,800 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-27 18:03:57,800 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 232 transitions, 2221 flow [2024-06-27 18:03:57,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 14 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:57,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:57,801 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2024-06-27 18:03:57,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-06-27 18:03:58,012 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,SelfDestructingSolverStorable14 [2024-06-27 18:03:58,013 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:03:58,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:58,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1921405849, now seen corresponding path program 5 times [2024-06-27 18:03:58,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:58,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495151914] [2024-06-27 18:03:58,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:58,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-06-27 18:03:58,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:58,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495151914] [2024-06-27 18:03:58,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495151914] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:58,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005377558] [2024-06-27 18:03:58,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:03:58,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:58,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:58,163 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) [2024-06-27 18:03:58,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 18:03:58,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 18:03:58,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:58,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 18:03:58,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-06-27 18:03:58,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-06-27 18:03:58,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005377558] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:58,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:58,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-06-27 18:03:58,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417549169] [2024-06-27 18:03:58,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:58,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 18:03:58,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:58,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 18:03:58,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2024-06-27 18:03:58,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2024-06-27 18:03:58,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 232 transitions, 2221 flow. Second operand has 19 states, 19 states have (on average 18.263157894736842) internal successors, (347), 19 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:58,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:58,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2024-06-27 18:03:58,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:00,644 INFO L124 PetriNetUnfolderBase]: 8103/14595 cut-off events. [2024-06-27 18:04:00,644 INFO L125 PetriNetUnfolderBase]: For 123551/124308 co-relation queries the response was YES. [2024-06-27 18:04:00,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70131 conditions, 14595 events. 8103/14595 cut-off events. For 123551/124308 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 104568 event pairs, 3154 based on Foata normal form. 324/14692 useless extension candidates. Maximal degree in co-relation 67128. Up to 7014 conditions per place. [2024-06-27 18:04:00,766 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 114 selfloop transitions, 8 changer transitions 144/378 dead transitions. [2024-06-27 18:04:00,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 378 transitions, 4060 flow [2024-06-27 18:04:00,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:04:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:04:00,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 294 transitions. [2024-06-27 18:04:00,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025641025641026 [2024-06-27 18:04:00,767 INFO L175 Difference]: Start difference. First operand has 174 places, 232 transitions, 2221 flow. Second operand 13 states and 294 transitions. [2024-06-27 18:04:00,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 378 transitions, 4060 flow [2024-06-27 18:04:01,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 378 transitions, 3881 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-27 18:04:01,551 INFO L231 Difference]: Finished difference. Result has 187 places, 234 transitions, 2186 flow [2024-06-27 18:04:01,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2086, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2186, PETRI_PLACES=187, PETRI_TRANSITIONS=234} [2024-06-27 18:04:01,552 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 142 predicate places. [2024-06-27 18:04:01,552 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 234 transitions, 2186 flow [2024-06-27 18:04:01,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 18.263157894736842) internal successors, (347), 19 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:01,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:01,552 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1] [2024-06-27 18:04:01,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 18:04:01,763 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,SelfDestructingSolverStorable15 [2024-06-27 18:04:01,764 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:04:01,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:01,764 INFO L85 PathProgramCache]: Analyzing trace with hash -119412860, now seen corresponding path program 6 times [2024-06-27 18:04:01,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:01,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774279716] [2024-06-27 18:04:01,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:01,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-06-27 18:04:01,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:01,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774279716] [2024-06-27 18:04:01,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774279716] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:01,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49720775] [2024-06-27 18:04:01,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:04:01,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:01,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:01,892 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) [2024-06-27 18:04:01,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 18:04:02,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 18:04:02,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:02,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 18:04:02,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-06-27 18:04:02,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-06-27 18:04:02,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49720775] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:02,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:02,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-06-27 18:04:02,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544355836] [2024-06-27 18:04:02,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:02,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 18:04:02,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:02,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 18:04:02,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2024-06-27 18:04:02,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-06-27 18:04:02,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 234 transitions, 2186 flow. Second operand has 19 states, 19 states have (on average 18.57894736842105) internal successors, (353), 19 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:02,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:02,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-06-27 18:04:02,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:03,849 INFO L124 PetriNetUnfolderBase]: 5837/10673 cut-off events. [2024-06-27 18:04:03,849 INFO L125 PetriNetUnfolderBase]: For 86113/87130 co-relation queries the response was YES. [2024-06-27 18:04:03,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51432 conditions, 10673 events. 5837/10673 cut-off events. For 86113/87130 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 75797 event pairs, 1489 based on Foata normal form. 472/10943 useless extension candidates. Maximal degree in co-relation 51319. Up to 3563 conditions per place. [2024-06-27 18:04:03,940 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 247 selfloop transitions, 21 changer transitions 3/385 dead transitions. [2024-06-27 18:04:03,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 385 transitions, 4268 flow [2024-06-27 18:04:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:04:03,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:04:03,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 274 transitions. [2024-06-27 18:04:03,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074074074074074 [2024-06-27 18:04:03,942 INFO L175 Difference]: Start difference. First operand has 187 places, 234 transitions, 2186 flow. Second operand 12 states and 274 transitions. [2024-06-27 18:04:03,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 385 transitions, 4268 flow [2024-06-27 18:04:04,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 385 transitions, 4016 flow, removed 122 selfloop flow, removed 8 redundant places. [2024-06-27 18:04:04,215 INFO L231 Difference]: Finished difference. Result has 183 places, 235 transitions, 2161 flow [2024-06-27 18:04:04,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2096, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2161, PETRI_PLACES=183, PETRI_TRANSITIONS=235} [2024-06-27 18:04:04,216 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 138 predicate places. [2024-06-27 18:04:04,216 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 235 transitions, 2161 flow [2024-06-27 18:04:04,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 18.57894736842105) internal successors, (353), 19 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:04,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:04,216 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1] [2024-06-27 18:04:04,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 18:04:04,427 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,SelfDestructingSolverStorable16 [2024-06-27 18:04:04,428 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:04:04,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:04,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1974456014, now seen corresponding path program 7 times [2024-06-27 18:04:04,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:04,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444620187] [2024-06-27 18:04:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:04,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-06-27 18:04:04,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:04,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444620187] [2024-06-27 18:04:04,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444620187] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:04,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443504103] [2024-06-27 18:04:04,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:04:04,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:04,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:04,578 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) [2024-06-27 18:04:04,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 18:04:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:04,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 18:04:04,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-06-27 18:04:04,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-06-27 18:04:04,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443504103] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:04,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:04,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-06-27 18:04:04,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071300888] [2024-06-27 18:04:04,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:04,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 18:04:04,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:04,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 18:04:04,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2024-06-27 18:04:04,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2024-06-27 18:04:04,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 235 transitions, 2161 flow. Second operand has 19 states, 19 states have (on average 18.42105263157895) internal successors, (350), 19 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:04,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:04,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2024-06-27 18:04:04,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:06,785 INFO L124 PetriNetUnfolderBase]: 7331/12904 cut-off events. [2024-06-27 18:04:06,785 INFO L125 PetriNetUnfolderBase]: For 100018/100321 co-relation queries the response was YES. [2024-06-27 18:04:06,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62608 conditions, 12904 events. 7331/12904 cut-off events. For 100018/100321 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 87009 event pairs, 1117 based on Foata normal form. 131/12870 useless extension candidates. Maximal degree in co-relation 62500. Up to 3015 conditions per place. [2024-06-27 18:04:06,886 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 125 selfloop transitions, 59 changer transitions 1/294 dead transitions. [2024-06-27 18:04:06,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 294 transitions, 2991 flow [2024-06-27 18:04:06,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:04:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:04:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 277 transitions. [2024-06-27 18:04:06,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735042735042735 [2024-06-27 18:04:06,898 INFO L175 Difference]: Start difference. First operand has 183 places, 235 transitions, 2161 flow. Second operand 13 states and 277 transitions. [2024-06-27 18:04:06,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 294 transitions, 2991 flow [2024-06-27 18:04:07,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 294 transitions, 2888 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-27 18:04:07,215 INFO L231 Difference]: Finished difference. Result has 187 places, 240 transitions, 2312 flow [2024-06-27 18:04:07,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2104, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2312, PETRI_PLACES=187, PETRI_TRANSITIONS=240} [2024-06-27 18:04:07,215 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 142 predicate places. [2024-06-27 18:04:07,216 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 240 transitions, 2312 flow [2024-06-27 18:04:07,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 18.42105263157895) internal successors, (350), 19 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:07,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:07,216 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:07,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-06-27 18:04:07,416 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,SelfDestructingSolverStorable17 [2024-06-27 18:04:07,417 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:04:07,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:07,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1441294193, now seen corresponding path program 8 times [2024-06-27 18:04:07,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:07,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703948704] [2024-06-27 18:04:07,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:07,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:07,570 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 18:04:07,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:07,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703948704] [2024-06-27 18:04:07,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703948704] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:07,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028086050] [2024-06-27 18:04:07,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:04:07,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:07,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:07,572 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) [2024-06-27 18:04:07,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 18:04:07,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:04:07,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:07,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 18:04:07,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 18:04:07,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 18:04:07,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028086050] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:07,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:07,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2024-06-27 18:04:07,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981939283] [2024-06-27 18:04:07,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:07,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 18:04:07,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:07,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 18:04:07,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-06-27 18:04:08,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 45 [2024-06-27 18:04:08,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 240 transitions, 2312 flow. Second operand has 17 states, 17 states have (on average 12.352941176470589) internal successors, (210), 17 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:08,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:08,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 45 [2024-06-27 18:04:08,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:12,328 INFO L124 PetriNetUnfolderBase]: 16538/24525 cut-off events. [2024-06-27 18:04:12,329 INFO L125 PetriNetUnfolderBase]: For 180937/181041 co-relation queries the response was YES. [2024-06-27 18:04:12,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118456 conditions, 24525 events. 16538/24525 cut-off events. For 180937/181041 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 140225 event pairs, 1042 based on Foata normal form. 210/24698 useless extension candidates. Maximal degree in co-relation 118351. Up to 5636 conditions per place. [2024-06-27 18:04:12,590 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 560 selfloop transitions, 212 changer transitions 90/875 dead transitions. [2024-06-27 18:04:12,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 875 transitions, 9200 flow [2024-06-27 18:04:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-06-27 18:04:12,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-06-27 18:04:12,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 935 transitions. [2024-06-27 18:04:12,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 18:04:12,594 INFO L175 Difference]: Start difference. First operand has 187 places, 240 transitions, 2312 flow. Second operand 51 states and 935 transitions. [2024-06-27 18:04:12,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 875 transitions, 9200 flow [2024-06-27 18:04:13,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 875 transitions, 9089 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 18:04:13,432 INFO L231 Difference]: Finished difference. Result has 246 places, 325 transitions, 3782 flow [2024-06-27 18:04:13,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3782, PETRI_PLACES=246, PETRI_TRANSITIONS=325} [2024-06-27 18:04:13,433 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-27 18:04:13,433 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 325 transitions, 3782 flow [2024-06-27 18:04:13,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 12.352941176470589) internal successors, (210), 17 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:13,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:13,434 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:13,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-06-27 18:04:13,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:13,637 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:04:13,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:13,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1025097744, now seen corresponding path program 9 times [2024-06-27 18:04:13,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:13,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909807309] [2024-06-27 18:04:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:13,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-06-27 18:04:13,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:13,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909807309] [2024-06-27 18:04:13,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909807309] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:13,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309481849] [2024-06-27 18:04:13,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:04:13,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:13,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:13,790 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) [2024-06-27 18:04:13,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 18:04:13,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 18:04:13,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:13,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 18:04:13,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-06-27 18:04:13,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-06-27 18:04:14,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309481849] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:14,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:14,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2024-06-27 18:04:14,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629307807] [2024-06-27 18:04:14,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:14,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 18:04:14,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:14,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 18:04:14,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-06-27 18:04:14,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2024-06-27 18:04:14,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 325 transitions, 3782 flow. Second operand has 17 states, 17 states have (on average 14.823529411764707) internal successors, (252), 17 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:14,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:14,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2024-06-27 18:04:14,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:23,059 INFO L124 PetriNetUnfolderBase]: 36322/51335 cut-off events. [2024-06-27 18:04:23,059 INFO L125 PetriNetUnfolderBase]: For 586111/586111 co-relation queries the response was YES. [2024-06-27 18:04:23,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287157 conditions, 51335 events. 36322/51335 cut-off events. For 586111/586111 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 288393 event pairs, 959 based on Foata normal form. 708/52043 useless extension candidates. Maximal degree in co-relation 268863. Up to 9349 conditions per place. [2024-06-27 18:04:23,926 INFO L140 encePairwiseOnDemand]: 27/45 looper letters, 0 selfloop transitions, 0 changer transitions 1610/1610 dead transitions. [2024-06-27 18:04:23,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 1610 transitions, 19363 flow [2024-06-27 18:04:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-06-27 18:04:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2024-06-27 18:04:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 1207 transitions. [2024-06-27 18:04:23,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4003316749585406 [2024-06-27 18:04:23,929 INFO L175 Difference]: Start difference. First operand has 246 places, 325 transitions, 3782 flow. Second operand 67 states and 1207 transitions. [2024-06-27 18:04:23,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 1610 transitions, 19363 flow [2024-06-27 18:04:34,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 1610 transitions, 17932 flow, removed 312 selfloop flow, removed 24 redundant places. [2024-06-27 18:04:34,837 INFO L231 Difference]: Finished difference. Result has 280 places, 0 transitions, 0 flow [2024-06-27 18:04:34,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=0, PETRI_PLACES=280, PETRI_TRANSITIONS=0} [2024-06-27 18:04:34,838 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 235 predicate places. [2024-06-27 18:04:34,838 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 0 transitions, 0 flow [2024-06-27 18:04:34,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.823529411764707) internal successors, (252), 17 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:34,840 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 7 remaining) [2024-06-27 18:04:34,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 7 remaining) [2024-06-27 18:04:34,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 7 remaining) [2024-06-27 18:04:34,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-06-27 18:04:34,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2024-06-27 18:04:34,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2024-06-27 18:04:34,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 7 remaining) [2024-06-27 18:04:34,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 18:04:35,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-06-27 18:04:35,042 INFO L445 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:35,045 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 18:04:35,045 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 18:04:35,049 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-27 18:04:35,049 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-27 18:04:35,050 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 06:04:35 BasicIcfg [2024-06-27 18:04:35,050 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 18:04:35,051 INFO L158 Benchmark]: Toolchain (without parser) took 52915.03ms. Allocated memory was 134.2MB in the beginning and 10.4GB in the end (delta: 10.2GB). Free memory was 97.1MB in the beginning and 3.8GB in the end (delta: -3.7GB). Peak memory consumption was 6.6GB. Max. memory is 16.1GB. [2024-06-27 18:04:35,051 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 104.9MB. Free memory is still 63.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 18:04:35,051 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 134.2MB. Free memory is still 107.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 18:04:35,051 INFO L158 Benchmark]: CACSL2BoogieTranslator took 325.32ms. Allocated memory is still 134.2MB. Free memory was 97.1MB in the beginning and 81.8MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-06-27 18:04:35,051 INFO L158 Benchmark]: Boogie Procedure Inliner took 84.97ms. Allocated memory is still 134.2MB. Free memory was 81.8MB in the beginning and 79.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 18:04:35,052 INFO L158 Benchmark]: Boogie Preprocessor took 86.64ms. Allocated memory is still 134.2MB. Free memory was 79.7MB in the beginning and 77.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 18:04:35,052 INFO L158 Benchmark]: RCFGBuilder took 565.39ms. Allocated memory is still 134.2MB. Free memory was 77.6MB in the beginning and 96.2MB in the end (delta: -18.5MB). Peak memory consumption was 42.5MB. Max. memory is 16.1GB. [2024-06-27 18:04:35,052 INFO L158 Benchmark]: TraceAbstraction took 51846.76ms. Allocated memory was 134.2MB in the beginning and 10.4GB in the end (delta: 10.2GB). Free memory was 95.6MB in the beginning and 3.8GB in the end (delta: -3.7GB). Peak memory consumption was 6.6GB. Max. memory is 16.1GB. [2024-06-27 18:04:35,053 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.15ms. Allocated memory is still 104.9MB. Free memory is still 63.6MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.18ms. Allocated memory is still 134.2MB. Free memory is still 107.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 325.32ms. Allocated memory is still 134.2MB. Free memory was 97.1MB in the beginning and 81.8MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 84.97ms. Allocated memory is still 134.2MB. Free memory was 81.8MB in the beginning and 79.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 86.64ms. Allocated memory is still 134.2MB. Free memory was 79.7MB in the beginning and 77.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 565.39ms. Allocated memory is still 134.2MB. Free memory was 77.6MB in the beginning and 96.2MB in the end (delta: -18.5MB). Peak memory consumption was 42.5MB. Max. memory is 16.1GB. * TraceAbstraction took 51846.76ms. Allocated memory was 134.2MB in the beginning and 10.4GB in the end (delta: 10.2GB). Free memory was 95.6MB in the beginning and 3.8GB in the end (delta: -3.7GB). Peak memory consumption was 6.6GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 96]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 97]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 98]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 103]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 60 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 51.7s, OverallIterations: 20, TraceHistogramMax: 4, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 42.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2766 SdHoareTripleChecker+Valid, 4.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2664 mSDsluCounter, 1200 SdHoareTripleChecker+Invalid, 3.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1129 mSDsCounter, 176 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9670 IncrementalHoareTripleChecker+Invalid, 9846 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 176 mSolverCounterUnsat, 71 mSDtfsCounter, 9670 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1528 GetRequests, 1141 SyntacticMatches, 30 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3900 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3782occurred in iteration=19, InterpolantAutomatonStates: 307, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 1293 NumberOfCodeBlocks, 1280 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 1816 ConstructedInterpolants, 0 QuantifiedInterpolants, 5697 SizeOfPredicates, 41 NumberOfNonLiveVariables, 3297 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 46 InterpolantComputations, 11 PerfectInterpolantSequences, 704/931 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-27 18:04:35,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE