./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/popl20-nonblocking-cntr.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-nonblocking-cntr.wvr.c ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/popl20-nonblocking-cntr.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 [2024-06-28 01:07:53,787 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 01:07:53,902 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 01:07:53,907 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 01:07:53,908 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 01:07:53,936 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 01:07:53,936 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 01:07:53,937 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 01:07:53,937 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 01:07:53,940 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 01:07:53,941 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 01:07:53,941 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 01:07:53,942 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 01:07:53,943 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 01:07:53,943 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 01:07:53,943 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 01:07:53,943 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 01:07:53,944 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 01:07:53,944 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 01:07:53,944 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 01:07:53,944 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 01:07:53,945 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 01:07:53,945 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 01:07:53,945 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 01:07:53,945 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 01:07:53,946 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 01:07:53,946 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 01:07:53,946 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 01:07:53,947 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 01:07:53,947 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 01:07:53,948 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 01:07:53,948 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 01:07:53,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:07:53,948 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 01:07:53,948 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 01:07:53,949 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 01:07:53,949 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 01:07:53,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 01:07:53,950 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 01:07:53,950 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 01:07:53,950 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 01:07:53,951 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 01:07:53,951 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 01:07:53,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 01:07:54,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 01:07:54,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 01:07:54,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 01:07:54,222 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 01:07:54,222 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 01:07:54,223 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/popl20-nonblocking-cntr.wvr.yml/witness.yml [2024-06-28 01:07:54,273 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 01:07:54,273 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 01:07:54,274 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2024-06-28 01:07:55,370 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 01:07:55,532 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 01:07:55,533 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2024-06-28 01:07:55,539 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fd1a4b5f/da9d7fce0fbd4e13af600527bdbbdf22/FLAG3c0c2aa56 [2024-06-28 01:07:55,552 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fd1a4b5f/da9d7fce0fbd4e13af600527bdbbdf22 [2024-06-28 01:07:55,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 01:07:55,553 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 01:07:55,556 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 01:07:55,556 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 01:07:55,559 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 01:07:55,560 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:07:54" (1/2) ... [2024-06-28 01:07:55,561 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34e6dab5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:07:55, skipping insertion in model container [2024-06-28 01:07:55,561 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:07:54" (1/2) ... [2024-06-28 01:07:55,563 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@44ffeb98 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:07:55, skipping insertion in model container [2024-06-28 01:07:55,563 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:07:55" (2/2) ... [2024-06-28 01:07:55,564 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34e6dab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:07:55, skipping insertion in model container [2024-06-28 01:07:55,564 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:07:55" (2/2) ... [2024-06-28 01:07:55,564 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 01:07:55,580 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 01:07:55,581 INFO L97 edCorrectnessWitness]: Location invariant before [L72-L72] (! multithreaded || 0 <= counter) && (! multithreaded || 0 <= counter) [2024-06-28 01:07:55,581 INFO L97 edCorrectnessWitness]: Location invariant before [L73-L73] (! multithreaded || 0 <= counter) && (! multithreaded || 0 <= counter) [2024-06-28 01:07:55,581 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 01:07:55,581 INFO L106 edCorrectnessWitness]: ghost_update [L71-L71] multithreaded = 1; [2024-06-28 01:07:55,598 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 01:07:55,748 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-nonblocking-cntr.wvr.c[2063,2076] [2024-06-28 01:07:55,751 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:07:55,757 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 01:07:55,805 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-nonblocking-cntr.wvr.c[2063,2076] [2024-06-28 01:07:55,809 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:07:55,821 INFO L206 MainTranslator]: Completed translation [2024-06-28 01:07:55,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:07:55 WrapperNode [2024-06-28 01:07:55,822 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 01:07:55,823 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 01:07:55,823 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 01:07:55,823 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 01:07:55,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:07:55" (1/1) ... [2024-06-28 01:07:55,835 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:07:55" (1/1) ... [2024-06-28 01:07:55,850 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 46 [2024-06-28 01:07:55,851 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 01:07:55,852 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 01:07:55,852 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 01:07:55,853 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 01:07:55,861 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:07:55" (1/1) ... [2024-06-28 01:07:55,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:07:55" (1/1) ... [2024-06-28 01:07:55,877 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:07:55" (1/1) ... [2024-06-28 01:07:55,888 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 01:07:55,893 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:07:55" (1/1) ... [2024-06-28 01:07:55,893 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:07:55" (1/1) ... [2024-06-28 01:07:55,899 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:07:55" (1/1) ... [2024-06-28 01:07:55,905 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:07:55" (1/1) ... [2024-06-28 01:07:55,906 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:07:55" (1/1) ... [2024-06-28 01:07:55,907 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:07:55" (1/1) ... [2024-06-28 01:07:55,908 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 01:07:55,910 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 01:07:55,910 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 01:07:55,911 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 01:07:55,911 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:07:55" (1/1) ... [2024-06-28 01:07:55,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:07:55,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:55,942 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) [2024-06-28 01:07:55,944 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 [2024-06-28 01:07:56,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 01:07:56,004 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-28 01:07:56,005 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-28 01:07:56,005 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-28 01:07:56,005 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-28 01:07:56,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 01:07:56,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 01:07:56,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 01:07:56,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 01:07:56,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 01:07:56,007 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 01:07:56,124 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 01:07:56,126 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 01:07:56,283 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 01:07:56,284 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 01:07:56,383 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 01:07:56,389 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-28 01:07:56,393 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:07:56 BoogieIcfgContainer [2024-06-28 01:07:56,393 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 01:07:56,395 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 01:07:56,395 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 01:07:56,398 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 01:07:56,412 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:07:54" (1/4) ... [2024-06-28 01:07:56,413 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448860a1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:07:56, skipping insertion in model container [2024-06-28 01:07:56,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 01:07:55" (2/4) ... [2024-06-28 01:07:56,413 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448860a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:07:56, skipping insertion in model container [2024-06-28 01:07:56,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:07:55" (3/4) ... [2024-06-28 01:07:56,414 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448860a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:07:56, skipping insertion in model container [2024-06-28 01:07:56,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:07:56" (4/4) ... [2024-06-28 01:07:56,415 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2024-06-28 01:07:56,428 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 01:07:56,429 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 01:07:56,429 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 01:07:56,493 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-28 01:07:56,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 66 flow [2024-06-28 01:07:56,567 INFO L124 PetriNetUnfolderBase]: 2/24 cut-off events. [2024-06-28 01:07:56,570 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-28 01:07:56,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 2/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-06-28 01:07:56,572 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 66 flow [2024-06-28 01:07:56,575 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 23 transitions, 58 flow [2024-06-28 01:07:56,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 01:07:56,591 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;@33ee753, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 01:07:56,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-28 01:07:56,609 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 01:07:56,609 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-28 01:07:56,610 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:07:56,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:56,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 01:07:56,611 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:56,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:56,616 INFO L85 PathProgramCache]: Analyzing trace with hash 222398889, now seen corresponding path program 1 times [2024-06-28 01:07:56,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:56,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474890621] [2024-06-28 01:07:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:56,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:56,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:56,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474890621] [2024-06-28 01:07:56,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474890621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:56,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:56,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 01:07:56,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913570323] [2024-06-28 01:07:56,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:56,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:07:56,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:56,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:07:56,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:07:56,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-28 01:07:56,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-06-28 01:07:56,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:56,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-28 01:07:56,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:56,885 INFO L124 PetriNetUnfolderBase]: 100/198 cut-off events. [2024-06-28 01:07:56,885 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-28 01:07:56,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 198 events. 100/198 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 656 event pairs, 32 based on Foata normal form. 10/203 useless extension candidates. Maximal degree in co-relation 349. Up to 114 conditions per place. [2024-06-28 01:07:56,888 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 24 selfloop transitions, 2 changer transitions 3/34 dead transitions. [2024-06-28 01:07:56,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 34 transitions, 147 flow [2024-06-28 01:07:56,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:07:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:07:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-06-28 01:07:56,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6794871794871795 [2024-06-28 01:07:56,898 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 58 flow. Second operand 3 states and 53 transitions. [2024-06-28 01:07:56,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 34 transitions, 147 flow [2024-06-28 01:07:56,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 133 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 01:07:56,905 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 66 flow [2024-06-28 01:07:56,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2024-06-28 01:07:56,909 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2024-06-28 01:07:56,909 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 66 flow [2024-06-28 01:07:56,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-06-28 01:07:56,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:56,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:56,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 01:07:56,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:56,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:56,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1633772955, now seen corresponding path program 1 times [2024-06-28 01:07:56,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:56,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027617718] [2024-06-28 01:07:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:56,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:56,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:56,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027617718] [2024-06-28 01:07:56,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027617718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:56,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:56,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:07:56,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942985552] [2024-06-28 01:07:56,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:56,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:07:56,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:56,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:07:56,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:07:56,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-28 01:07:56,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:56,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:56,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-28 01:07:56,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:57,054 INFO L124 PetriNetUnfolderBase]: 111/227 cut-off events. [2024-06-28 01:07:57,054 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-28 01:07:57,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 227 events. 111/227 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 768 event pairs, 27 based on Foata normal form. 12/237 useless extension candidates. Maximal degree in co-relation 140. Up to 73 conditions per place. [2024-06-28 01:07:57,056 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 31 selfloop transitions, 3 changer transitions 3/42 dead transitions. [2024-06-28 01:07:57,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 42 transitions, 183 flow [2024-06-28 01:07:57,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:07:57,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:07:57,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-06-28 01:07:57,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6442307692307693 [2024-06-28 01:07:57,058 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 66 flow. Second operand 4 states and 67 transitions. [2024-06-28 01:07:57,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 42 transitions, 183 flow [2024-06-28 01:07:57,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:07:57,060 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 74 flow [2024-06-28 01:07:57,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2024-06-28 01:07:57,061 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-06-28 01:07:57,061 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 74 flow [2024-06-28 01:07:57,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:57,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:57,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:57,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 01:07:57,062 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:57,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:57,063 INFO L85 PathProgramCache]: Analyzing trace with hash -438241960, now seen corresponding path program 1 times [2024-06-28 01:07:57,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:57,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330528971] [2024-06-28 01:07:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:57,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:57,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:57,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330528971] [2024-06-28 01:07:57,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330528971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:57,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:57,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:07:57,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080254775] [2024-06-28 01:07:57,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:57,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:07:57,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:07:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:07:57,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-28 01:07:57,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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) [2024-06-28 01:07:57,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:57,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-28 01:07:57,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:57,270 INFO L124 PetriNetUnfolderBase]: 120/247 cut-off events. [2024-06-28 01:07:57,270 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2024-06-28 01:07:57,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 247 events. 120/247 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 849 event pairs, 29 based on Foata normal form. 12/257 useless extension candidates. Maximal degree in co-relation 147. Up to 107 conditions per place. [2024-06-28 01:07:57,272 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 28 selfloop transitions, 6 changer transitions 3/42 dead transitions. [2024-06-28 01:07:57,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 193 flow [2024-06-28 01:07:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:07:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:07:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2024-06-28 01:07:57,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2024-06-28 01:07:57,274 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 74 flow. Second operand 5 states and 73 transitions. [2024-06-28 01:07:57,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 193 flow [2024-06-28 01:07:57,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 42 transitions, 189 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 01:07:57,275 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 103 flow [2024-06-28 01:07:57,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-06-28 01:07:57,276 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2024-06-28 01:07:57,277 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 103 flow [2024-06-28 01:07:57,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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) [2024-06-28 01:07:57,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:57,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:57,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 01:07:57,277 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:57,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:57,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1664503334, now seen corresponding path program 1 times [2024-06-28 01:07:57,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:57,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329231878] [2024-06-28 01:07:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:57,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:57,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:57,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329231878] [2024-06-28 01:07:57,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329231878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:57,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:57,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:07:57,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566537440] [2024-06-28 01:07:57,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:57,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:07:57,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:57,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:07:57,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:07:57,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 26 [2024-06-28 01:07:57,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:57,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:57,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 26 [2024-06-28 01:07:57,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:57,414 INFO L124 PetriNetUnfolderBase]: 140/295 cut-off events. [2024-06-28 01:07:57,414 INFO L125 PetriNetUnfolderBase]: For 338/338 co-relation queries the response was YES. [2024-06-28 01:07:57,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 295 events. 140/295 cut-off events. For 338/338 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1110 event pairs, 74 based on Foata normal form. 14/308 useless extension candidates. Maximal degree in co-relation 405. Up to 215 conditions per place. [2024-06-28 01:07:57,416 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 26 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2024-06-28 01:07:57,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 203 flow [2024-06-28 01:07:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:07:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:07:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-06-28 01:07:57,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-28 01:07:57,418 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 103 flow. Second operand 4 states and 60 transitions. [2024-06-28 01:07:57,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 203 flow [2024-06-28 01:07:57,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 191 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 01:07:57,419 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 123 flow [2024-06-28 01:07:57,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2024-06-28 01:07:57,420 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2024-06-28 01:07:57,420 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 123 flow [2024-06-28 01:07:57,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:57,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:57,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:57,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 01:07:57,421 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:57,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:57,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1575249380, now seen corresponding path program 1 times [2024-06-28 01:07:57,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:57,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141762406] [2024-06-28 01:07:57,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:57,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:57,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:57,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141762406] [2024-06-28 01:07:57,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141762406] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:57,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649415459] [2024-06-28 01:07:57,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:57,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:57,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:57,544 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) [2024-06-28 01:07:57,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-28 01:07:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:57,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-28 01:07:57,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:57,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:57,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649415459] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:57,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:57,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-06-28 01:07:57,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025808391] [2024-06-28 01:07:57,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:57,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:07:57,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:57,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:07:57,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:07:57,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-06-28 01:07:57,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 123 flow. Second operand has 11 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 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) [2024-06-28 01:07:57,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:57,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-06-28 01:07:57,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:57,935 INFO L124 PetriNetUnfolderBase]: 200/371 cut-off events. [2024-06-28 01:07:57,935 INFO L125 PetriNetUnfolderBase]: For 413/413 co-relation queries the response was YES. [2024-06-28 01:07:57,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 371 events. 200/371 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1364 event pairs, 30 based on Foata normal form. 14/384 useless extension candidates. Maximal degree in co-relation 523. Up to 144 conditions per place. [2024-06-28 01:07:57,938 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 37 selfloop transitions, 10 changer transitions 4/55 dead transitions. [2024-06-28 01:07:57,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 318 flow [2024-06-28 01:07:57,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:07:57,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:07:57,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 82 transitions. [2024-06-28 01:07:57,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-06-28 01:07:57,939 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 123 flow. Second operand 6 states and 82 transitions. [2024-06-28 01:07:57,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 318 flow [2024-06-28 01:07:57,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 309 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-28 01:07:57,941 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 196 flow [2024-06-28 01:07:57,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2024-06-28 01:07:57,942 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 14 predicate places. [2024-06-28 01:07:57,942 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 196 flow [2024-06-28 01:07:57,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 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) [2024-06-28 01:07:57,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:57,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:57,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:58,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:58,157 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:58,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:58,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1617614296, now seen corresponding path program 2 times [2024-06-28 01:07:58,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:58,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671572126] [2024-06-28 01:07:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:58,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:58,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:58,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671572126] [2024-06-28 01:07:58,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671572126] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:58,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134938602] [2024-06-28 01:07:58,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:07:58,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:58,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:58,252 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) [2024-06-28 01:07:58,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-28 01:07:58,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:07:58,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:58,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-28 01:07:58,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:58,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:58,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134938602] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:58,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:58,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 5 [2024-06-28 01:07:58,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860059660] [2024-06-28 01:07:58,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:58,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:07:58,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:58,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:07:58,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:07:58,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-28 01:07:58,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 196 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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) [2024-06-28 01:07:58,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:58,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-28 01:07:58,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:58,606 INFO L124 PetriNetUnfolderBase]: 219/452 cut-off events. [2024-06-28 01:07:58,606 INFO L125 PetriNetUnfolderBase]: For 1513/1544 co-relation queries the response was YES. [2024-06-28 01:07:58,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1576 conditions, 452 events. 219/452 cut-off events. For 1513/1544 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1929 event pairs, 48 based on Foata normal form. 4/451 useless extension candidates. Maximal degree in co-relation 948. Up to 174 conditions per place. [2024-06-28 01:07:58,610 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 42 selfloop transitions, 9 changer transitions 3/60 dead transitions. [2024-06-28 01:07:58,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 60 transitions, 444 flow [2024-06-28 01:07:58,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:07:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:07:58,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-06-28 01:07:58,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6730769230769231 [2024-06-28 01:07:58,611 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 196 flow. Second operand 4 states and 70 transitions. [2024-06-28 01:07:58,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 60 transitions, 444 flow [2024-06-28 01:07:58,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 60 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:07:58,615 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 307 flow [2024-06-28 01:07:58,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=307, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-28 01:07:58,616 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 18 predicate places. [2024-06-28 01:07:58,616 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 307 flow [2024-06-28 01:07:58,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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) [2024-06-28 01:07:58,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:58,617 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:58,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-06-28 01:07:58,828 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 [2024-06-28 01:07:58,829 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:58,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:58,829 INFO L85 PathProgramCache]: Analyzing trace with hash -748183216, now seen corresponding path program 3 times [2024-06-28 01:07:58,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:58,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658101858] [2024-06-28 01:07:58,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:58,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:58,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:58,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658101858] [2024-06-28 01:07:58,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658101858] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:58,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838738769] [2024-06-28 01:07:58,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:07:58,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:58,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:58,986 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) [2024-06-28 01:07:59,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-28 01:07:59,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-28 01:07:59,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:59,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 01:07:59,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:59,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:59,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838738769] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:59,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:59,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-06-28 01:07:59,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205966513] [2024-06-28 01:07:59,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:59,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-28 01:07:59,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:59,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-28 01:07:59,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2024-06-28 01:07:59,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-28 01:07:59,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 307 flow. Second operand has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 19 states have internal predecessors, (143), 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) [2024-06-28 01:07:59,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:59,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-28 01:07:59,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:59,938 INFO L124 PetriNetUnfolderBase]: 918/1515 cut-off events. [2024-06-28 01:07:59,938 INFO L125 PetriNetUnfolderBase]: For 4854/4854 co-relation queries the response was YES. [2024-06-28 01:07:59,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5627 conditions, 1515 events. 918/1515 cut-off events. For 4854/4854 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6796 event pairs, 36 based on Foata normal form. 0/1371 useless extension candidates. Maximal degree in co-relation 3141. Up to 285 conditions per place. [2024-06-28 01:07:59,948 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 126 selfloop transitions, 91 changer transitions 7/227 dead transitions. [2024-06-28 01:07:59,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 227 transitions, 1951 flow [2024-06-28 01:07:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-28 01:07:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-28 01:07:59,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 332 transitions. [2024-06-28 01:07:59,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256410256410256 [2024-06-28 01:07:59,951 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 307 flow. Second operand 30 states and 332 transitions. [2024-06-28 01:07:59,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 227 transitions, 1951 flow [2024-06-28 01:07:59,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 227 transitions, 1929 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-28 01:07:59,962 INFO L231 Difference]: Finished difference. Result has 81 places, 132 transitions, 1336 flow [2024-06-28 01:07:59,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1336, PETRI_PLACES=81, PETRI_TRANSITIONS=132} [2024-06-28 01:07:59,963 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-06-28 01:07:59,963 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 132 transitions, 1336 flow [2024-06-28 01:07:59,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 19 states have internal predecessors, (143), 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) [2024-06-28 01:07:59,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:59,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:59,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:00,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:00,176 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:00,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:00,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2075968970, now seen corresponding path program 4 times [2024-06-28 01:08:00,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:00,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296571881] [2024-06-28 01:08:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:00,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:00,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:00,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296571881] [2024-06-28 01:08:00,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296571881] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:00,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884163044] [2024-06-28 01:08:00,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 01:08:00,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:00,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:00,325 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) [2024-06-28 01:08:00,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-28 01:08:00,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 01:08:00,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:00,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-28 01:08:00,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:00,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:00,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884163044] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:00,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:00,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2024-06-28 01:08:00,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084914071] [2024-06-28 01:08:00,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:00,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-28 01:08:00,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:00,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-28 01:08:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-06-28 01:08:00,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-28 01:08:00,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 132 transitions, 1336 flow. Second operand has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 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) [2024-06-28 01:08:00,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:00,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-28 01:08:00,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:01,207 INFO L124 PetriNetUnfolderBase]: 1312/2185 cut-off events. [2024-06-28 01:08:01,207 INFO L125 PetriNetUnfolderBase]: For 11678/11678 co-relation queries the response was YES. [2024-06-28 01:08:01,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10300 conditions, 2185 events. 1312/2185 cut-off events. For 11678/11678 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10638 event pairs, 34 based on Foata normal form. 44/2229 useless extension candidates. Maximal degree in co-relation 6487. Up to 416 conditions per place. [2024-06-28 01:08:01,224 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 230 selfloop transitions, 182 changer transitions 26/441 dead transitions. [2024-06-28 01:08:01,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 441 transitions, 4297 flow [2024-06-28 01:08:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-28 01:08:01,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-28 01:08:01,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 415 transitions. [2024-06-28 01:08:01,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4200404858299595 [2024-06-28 01:08:01,226 INFO L175 Difference]: Start difference. First operand has 81 places, 132 transitions, 1336 flow. Second operand 38 states and 415 transitions. [2024-06-28 01:08:01,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 441 transitions, 4297 flow [2024-06-28 01:08:01,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 441 transitions, 3989 flow, removed 147 selfloop flow, removed 4 redundant places. [2024-06-28 01:08:01,262 INFO L231 Difference]: Finished difference. Result has 138 places, 246 transitions, 2904 flow [2024-06-28 01:08:01,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2904, PETRI_PLACES=138, PETRI_TRANSITIONS=246} [2024-06-28 01:08:01,263 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 110 predicate places. [2024-06-28 01:08:01,263 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 246 transitions, 2904 flow [2024-06-28 01:08:01,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 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) [2024-06-28 01:08:01,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:01,264 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:01,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:01,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:01,475 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:01,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:01,475 INFO L85 PathProgramCache]: Analyzing trace with hash -255762638, now seen corresponding path program 5 times [2024-06-28 01:08:01,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:01,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856723488] [2024-06-28 01:08:01,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:01,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:01,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:01,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856723488] [2024-06-28 01:08:01,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856723488] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:01,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939275370] [2024-06-28 01:08:01,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-28 01:08:01,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:01,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:01,579 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) [2024-06-28 01:08:01,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-28 01:08:01,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-28 01:08:01,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:01,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-28 01:08:01,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:01,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:01,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939275370] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:01,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:01,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 18 [2024-06-28 01:08:01,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625524813] [2024-06-28 01:08:01,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:01,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-28 01:08:01,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:01,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-28 01:08:01,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-06-28 01:08:01,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-28 01:08:01,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 246 transitions, 2904 flow. Second operand has 18 states, 18 states have (on average 7.444444444444445) internal successors, (134), 18 states have internal predecessors, (134), 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) [2024-06-28 01:08:01,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:01,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-28 01:08:01,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:02,618 INFO L124 PetriNetUnfolderBase]: 1724/2870 cut-off events. [2024-06-28 01:08:02,619 INFO L125 PetriNetUnfolderBase]: For 38252/38252 co-relation queries the response was YES. [2024-06-28 01:08:02,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17803 conditions, 2870 events. 1724/2870 cut-off events. For 38252/38252 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15064 event pairs, 22 based on Foata normal form. 124/2994 useless extension candidates. Maximal degree in co-relation 17416. Up to 581 conditions per place. [2024-06-28 01:08:02,647 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 223 selfloop transitions, 267 changer transitions 3/496 dead transitions. [2024-06-28 01:08:02,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 496 transitions, 6538 flow [2024-06-28 01:08:02,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-28 01:08:02,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-28 01:08:02,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 334 transitions. [2024-06-28 01:08:02,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143920595533499 [2024-06-28 01:08:02,650 INFO L175 Difference]: Start difference. First operand has 138 places, 246 transitions, 2904 flow. Second operand 31 states and 334 transitions. [2024-06-28 01:08:02,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 496 transitions, 6538 flow [2024-06-28 01:08:02,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 496 transitions, 6268 flow, removed 134 selfloop flow, removed 2 redundant places. [2024-06-28 01:08:02,713 INFO L231 Difference]: Finished difference. Result has 175 places, 347 transitions, 4769 flow [2024-06-28 01:08:02,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2768, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4769, PETRI_PLACES=175, PETRI_TRANSITIONS=347} [2024-06-28 01:08:02,714 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 147 predicate places. [2024-06-28 01:08:02,714 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 347 transitions, 4769 flow [2024-06-28 01:08:02,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.444444444444445) internal successors, (134), 18 states have internal predecessors, (134), 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) [2024-06-28 01:08:02,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:02,715 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:02,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:02,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:02,928 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:02,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:02,928 INFO L85 PathProgramCache]: Analyzing trace with hash -934909356, now seen corresponding path program 6 times [2024-06-28 01:08:02,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:02,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264500442] [2024-06-28 01:08:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:02,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:03,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:03,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264500442] [2024-06-28 01:08:03,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264500442] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:03,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275346057] [2024-06-28 01:08:03,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-28 01:08:03,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:03,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:03,041 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) [2024-06-28 01:08:03,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-28 01:08:03,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-28 01:08:03,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:03,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 01:08:03,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:03,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:03,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275346057] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:03,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:03,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-06-28 01:08:03,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999685149] [2024-06-28 01:08:03,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:03,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-28 01:08:03,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:03,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-28 01:08:03,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-06-28 01:08:03,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-28 01:08:03,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 347 transitions, 4769 flow. Second operand has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 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) [2024-06-28 01:08:03,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:03,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-28 01:08:03,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:04,481 INFO L124 PetriNetUnfolderBase]: 1779/2990 cut-off events. [2024-06-28 01:08:04,482 INFO L125 PetriNetUnfolderBase]: For 57165/57165 co-relation queries the response was YES. [2024-06-28 01:08:04,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21467 conditions, 2990 events. 1779/2990 cut-off events. For 57165/57165 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15967 event pairs, 10 based on Foata normal form. 85/3075 useless extension candidates. Maximal degree in co-relation 21081. Up to 582 conditions per place. [2024-06-28 01:08:04,516 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 211 selfloop transitions, 361 changer transitions 3/578 dead transitions. [2024-06-28 01:08:04,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 578 transitions, 8808 flow [2024-06-28 01:08:04,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-06-28 01:08:04,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-06-28 01:08:04,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 508 transitions. [2024-06-28 01:08:04,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3987441130298273 [2024-06-28 01:08:04,519 INFO L175 Difference]: Start difference. First operand has 175 places, 347 transitions, 4769 flow. Second operand 49 states and 508 transitions. [2024-06-28 01:08:04,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 578 transitions, 8808 flow [2024-06-28 01:08:04,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 578 transitions, 8369 flow, removed 187 selfloop flow, removed 10 redundant places. [2024-06-28 01:08:04,699 INFO L231 Difference]: Finished difference. Result has 234 places, 438 transitions, 7169 flow [2024-06-28 01:08:04,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4416, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=7169, PETRI_PLACES=234, PETRI_TRANSITIONS=438} [2024-06-28 01:08:04,700 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 206 predicate places. [2024-06-28 01:08:04,700 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 438 transitions, 7169 flow [2024-06-28 01:08:04,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 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) [2024-06-28 01:08:04,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:04,701 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:04,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:04,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:04,912 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:04,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:04,912 INFO L85 PathProgramCache]: Analyzing trace with hash -108223470, now seen corresponding path program 7 times [2024-06-28 01:08:04,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:04,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803252359] [2024-06-28 01:08:04,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:04,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:05,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:05,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803252359] [2024-06-28 01:08:05,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803252359] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:05,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370715269] [2024-06-28 01:08:05,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-28 01:08:05,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:05,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:05,033 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) [2024-06-28 01:08:05,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-28 01:08:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:05,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-28 01:08:05,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:05,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:05,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370715269] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:05,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:05,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-06-28 01:08:05,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176105892] [2024-06-28 01:08:05,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:05,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-28 01:08:05,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:05,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-28 01:08:05,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2024-06-28 01:08:05,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-28 01:08:05,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 438 transitions, 7169 flow. Second operand has 23 states, 23 states have (on average 7.478260869565218) internal successors, (172), 23 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) [2024-06-28 01:08:05,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:05,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-28 01:08:05,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:07,106 INFO L124 PetriNetUnfolderBase]: 2955/4952 cut-off events. [2024-06-28 01:08:07,107 INFO L125 PetriNetUnfolderBase]: For 143052/143052 co-relation queries the response was YES. [2024-06-28 01:08:07,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41470 conditions, 4952 events. 2955/4952 cut-off events. For 143052/143052 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28372 event pairs, 14 based on Foata normal form. 102/5054 useless extension candidates. Maximal degree in co-relation 41052. Up to 1017 conditions per place. [2024-06-28 01:08:07,178 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 348 selfloop transitions, 632 changer transitions 5/988 dead transitions. [2024-06-28 01:08:07,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 988 transitions, 17905 flow [2024-06-28 01:08:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-06-28 01:08:07,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-06-28 01:08:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 477 transitions. [2024-06-28 01:08:07,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3988294314381271 [2024-06-28 01:08:07,181 INFO L175 Difference]: Start difference. First operand has 234 places, 438 transitions, 7169 flow. Second operand 46 states and 477 transitions. [2024-06-28 01:08:07,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 988 transitions, 17905 flow [2024-06-28 01:08:07,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 988 transitions, 17059 flow, removed 257 selfloop flow, removed 17 redundant places. [2024-06-28 01:08:07,749 INFO L231 Difference]: Finished difference. Result has 279 places, 781 transitions, 14746 flow [2024-06-28 01:08:07,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6645, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=14746, PETRI_PLACES=279, PETRI_TRANSITIONS=781} [2024-06-28 01:08:07,749 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 251 predicate places. [2024-06-28 01:08:07,750 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 781 transitions, 14746 flow [2024-06-28 01:08:07,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.478260869565218) internal successors, (172), 23 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) [2024-06-28 01:08:07,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:07,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:07,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:07,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:07,965 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:07,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:07,965 INFO L85 PathProgramCache]: Analyzing trace with hash 175733068, now seen corresponding path program 8 times [2024-06-28 01:08:07,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:07,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780413741] [2024-06-28 01:08:07,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:07,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:08,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:08,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780413741] [2024-06-28 01:08:08,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780413741] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:08,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032505833] [2024-06-28 01:08:08,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:08:08,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:08,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:08,075 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) [2024-06-28 01:08:08,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-28 01:08:08,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:08:08,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:08,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 01:08:08,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:08,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:08,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032505833] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:08,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:08,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-06-28 01:08:08,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111201665] [2024-06-28 01:08:08,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:08,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-28 01:08:08,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:08,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-28 01:08:08,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2024-06-28 01:08:08,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-28 01:08:08,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 781 transitions, 14746 flow. Second operand has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 21 states have internal predecessors, (155), 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) [2024-06-28 01:08:08,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:08,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-28 01:08:08,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:10,331 INFO L124 PetriNetUnfolderBase]: 3380/5632 cut-off events. [2024-06-28 01:08:10,331 INFO L125 PetriNetUnfolderBase]: For 228293/228293 co-relation queries the response was YES. [2024-06-28 01:08:10,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53109 conditions, 5632 events. 3380/5632 cut-off events. For 228293/228293 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 32915 event pairs, 69 based on Foata normal form. 16/5648 useless extension candidates. Maximal degree in co-relation 51758. Up to 1247 conditions per place. [2024-06-28 01:08:10,400 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 455 selfloop transitions, 569 changer transitions 4/1031 dead transitions. [2024-06-28 01:08:10,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1031 transitions, 21310 flow [2024-06-28 01:08:10,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-28 01:08:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-28 01:08:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 348 transitions. [2024-06-28 01:08:10,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3936651583710407 [2024-06-28 01:08:10,402 INFO L175 Difference]: Start difference. First operand has 279 places, 781 transitions, 14746 flow. Second operand 34 states and 348 transitions. [2024-06-28 01:08:10,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1031 transitions, 21310 flow [2024-06-28 01:08:11,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1031 transitions, 20599 flow, removed 308 selfloop flow, removed 11 redundant places. [2024-06-28 01:08:11,392 INFO L231 Difference]: Finished difference. Result has 309 places, 883 transitions, 17378 flow [2024-06-28 01:08:11,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=14353, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=17378, PETRI_PLACES=309, PETRI_TRANSITIONS=883} [2024-06-28 01:08:11,393 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 281 predicate places. [2024-06-28 01:08:11,395 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 883 transitions, 17378 flow [2024-06-28 01:08:11,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 21 states have internal predecessors, (155), 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) [2024-06-28 01:08:11,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:11,395 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:11,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:11,607 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,SelfDestructingSolverStorable11 [2024-06-28 01:08:11,608 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:11,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:11,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1417132590, now seen corresponding path program 9 times [2024-06-28 01:08:11,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:11,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518091851] [2024-06-28 01:08:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:11,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:11,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:11,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518091851] [2024-06-28 01:08:11,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518091851] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:11,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301881084] [2024-06-28 01:08:11,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:08:11,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:11,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:11,709 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) [2024-06-28 01:08:11,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-28 01:08:11,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-28 01:08:11,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:11,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 01:08:11,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:11,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:11,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301881084] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:11,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:11,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-06-28 01:08:11,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152405636] [2024-06-28 01:08:11,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:11,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-28 01:08:11,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:11,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-28 01:08:11,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2024-06-28 01:08:11,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-28 01:08:11,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 883 transitions, 17378 flow. Second operand has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 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) [2024-06-28 01:08:11,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:11,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-28 01:08:11,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:14,424 INFO L124 PetriNetUnfolderBase]: 3866/6469 cut-off events. [2024-06-28 01:08:14,424 INFO L125 PetriNetUnfolderBase]: For 255791/255791 co-relation queries the response was YES. [2024-06-28 01:08:14,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62176 conditions, 6469 events. 3866/6469 cut-off events. For 255791/255791 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 38915 event pairs, 53 based on Foata normal form. 83/6552 useless extension candidates. Maximal degree in co-relation 61770. Up to 1258 conditions per place. [2024-06-28 01:08:14,528 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 312 selfloop transitions, 902 changer transitions 2/1219 dead transitions. [2024-06-28 01:08:14,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 1219 transitions, 25905 flow [2024-06-28 01:08:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-06-28 01:08:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-06-28 01:08:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 476 transitions. [2024-06-28 01:08:14,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979933110367893 [2024-06-28 01:08:14,537 INFO L175 Difference]: Start difference. First operand has 309 places, 883 transitions, 17378 flow. Second operand 46 states and 476 transitions. [2024-06-28 01:08:14,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 1219 transitions, 25905 flow [2024-06-28 01:08:15,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1219 transitions, 25731 flow, removed 49 selfloop flow, removed 11 redundant places. [2024-06-28 01:08:15,816 INFO L231 Difference]: Finished difference. Result has 360 places, 1075 transitions, 24739 flow [2024-06-28 01:08:15,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=17164, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=724, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=24739, PETRI_PLACES=360, PETRI_TRANSITIONS=1075} [2024-06-28 01:08:15,817 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 332 predicate places. [2024-06-28 01:08:15,817 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 1075 transitions, 24739 flow [2024-06-28 01:08:15,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 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) [2024-06-28 01:08:15,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:15,818 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:15,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:16,028 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,SelfDestructingSolverStorable12 [2024-06-28 01:08:16,029 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:16,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:16,029 INFO L85 PathProgramCache]: Analyzing trace with hash -362122510, now seen corresponding path program 10 times [2024-06-28 01:08:16,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:16,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997973065] [2024-06-28 01:08:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:16,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:16,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:16,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997973065] [2024-06-28 01:08:16,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997973065] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:16,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680159491] [2024-06-28 01:08:16,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 01:08:16,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:16,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:16,154 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) [2024-06-28 01:08:16,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-28 01:08:16,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 01:08:16,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:16,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-28 01:08:16,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:16,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:16,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680159491] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:16,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:16,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 21 [2024-06-28 01:08:16,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832724423] [2024-06-28 01:08:16,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:16,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-28 01:08:16,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:16,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-28 01:08:16,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2024-06-28 01:08:16,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-28 01:08:16,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 1075 transitions, 24739 flow. Second operand has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 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) [2024-06-28 01:08:16,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:16,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-28 01:08:16,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:20,057 INFO L124 PetriNetUnfolderBase]: 6293/10086 cut-off events. [2024-06-28 01:08:20,057 INFO L125 PetriNetUnfolderBase]: For 485015/485015 co-relation queries the response was YES. [2024-06-28 01:08:20,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104063 conditions, 10086 events. 6293/10086 cut-off events. For 485015/485015 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 61194 event pairs, 156 based on Foata normal form. 27/10113 useless extension candidates. Maximal degree in co-relation 102855. Up to 2058 conditions per place. [2024-06-28 01:08:20,170 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 526 selfloop transitions, 659 changer transitions 4/1190 dead transitions. [2024-06-28 01:08:20,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1190 transitions, 28770 flow [2024-06-28 01:08:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-28 01:08:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-28 01:08:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 254 transitions. [2024-06-28 01:08:20,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3757396449704142 [2024-06-28 01:08:20,173 INFO L175 Difference]: Start difference. First operand has 360 places, 1075 transitions, 24739 flow. Second operand 26 states and 254 transitions. [2024-06-28 01:08:20,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1190 transitions, 28770 flow [2024-06-28 01:08:23,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1190 transitions, 28129 flow, removed 253 selfloop flow, removed 19 redundant places. [2024-06-28 01:08:23,771 INFO L231 Difference]: Finished difference. Result has 369 places, 1076 transitions, 25850 flow [2024-06-28 01:08:23,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=23987, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1068, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=650, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=25850, PETRI_PLACES=369, PETRI_TRANSITIONS=1076} [2024-06-28 01:08:23,773 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 341 predicate places. [2024-06-28 01:08:23,773 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1076 transitions, 25850 flow [2024-06-28 01:08:23,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 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) [2024-06-28 01:08:23,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:23,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:23,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:23,985 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,SelfDestructingSolverStorable13 [2024-06-28 01:08:23,985 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:23,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1132621562, now seen corresponding path program 11 times [2024-06-28 01:08:23,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:23,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778463084] [2024-06-28 01:08:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:23,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:24,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:24,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778463084] [2024-06-28 01:08:24,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778463084] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:24,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613408144] [2024-06-28 01:08:24,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-28 01:08:24,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:24,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:24,111 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) [2024-06-28 01:08:24,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-28 01:08:24,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-28 01:08:24,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:24,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-28 01:08:24,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:24,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:24,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613408144] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:24,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:24,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-06-28 01:08:24,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785316254] [2024-06-28 01:08:24,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:24,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-28 01:08:24,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-28 01:08:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2024-06-28 01:08:24,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-28 01:08:24,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1076 transitions, 25850 flow. Second operand has 23 states, 23 states have (on average 7.521739130434782) internal successors, (173), 23 states have internal predecessors, (173), 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) [2024-06-28 01:08:24,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:24,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-28 01:08:24,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:27,469 INFO L124 PetriNetUnfolderBase]: 4295/7224 cut-off events. [2024-06-28 01:08:27,469 INFO L125 PetriNetUnfolderBase]: For 357536/357536 co-relation queries the response was YES. [2024-06-28 01:08:27,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79124 conditions, 7224 events. 4295/7224 cut-off events. For 357536/357536 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 44965 event pairs, 39 based on Foata normal form. 128/7352 useless extension candidates. Maximal degree in co-relation 78300. Up to 3392 conditions per place. [2024-06-28 01:08:27,574 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 710 selfloop transitions, 640 changer transitions 3/1356 dead transitions. [2024-06-28 01:08:27,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1356 transitions, 34363 flow [2024-06-28 01:08:27,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-28 01:08:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-28 01:08:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 288 transitions. [2024-06-28 01:08:27,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4260355029585799 [2024-06-28 01:08:27,576 INFO L175 Difference]: Start difference. First operand has 369 places, 1076 transitions, 25850 flow. Second operand 26 states and 288 transitions. [2024-06-28 01:08:27,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1356 transitions, 34363 flow [2024-06-28 01:08:29,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1356 transitions, 33224 flow, removed 74 selfloop flow, removed 21 redundant places. [2024-06-28 01:08:29,922 INFO L231 Difference]: Finished difference. Result has 389 places, 1187 transitions, 30310 flow [2024-06-28 01:08:29,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=24975, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=539, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=30310, PETRI_PLACES=389, PETRI_TRANSITIONS=1187} [2024-06-28 01:08:29,923 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 361 predicate places. [2024-06-28 01:08:29,924 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 1187 transitions, 30310 flow [2024-06-28 01:08:29,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.521739130434782) internal successors, (173), 23 states have internal predecessors, (173), 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) [2024-06-28 01:08:29,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:29,924 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:29,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:30,143 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,SelfDestructingSolverStorable14 [2024-06-28 01:08:30,143 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:30,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:30,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1778307146, now seen corresponding path program 12 times [2024-06-28 01:08:30,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:30,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705371751] [2024-06-28 01:08:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:30,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:30,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:30,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705371751] [2024-06-28 01:08:30,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705371751] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:30,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845876546] [2024-06-28 01:08:30,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-28 01:08:30,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:30,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:30,236 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) [2024-06-28 01:08:30,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-28 01:08:30,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-28 01:08:30,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:30,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 01:08:30,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:30,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:30,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845876546] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:30,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:30,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-06-28 01:08:30,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723778517] [2024-06-28 01:08:30,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:30,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-28 01:08:30,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:30,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-28 01:08:30,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-06-28 01:08:30,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-28 01:08:30,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 1187 transitions, 30310 flow. Second operand has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 21 states have internal predecessors, (155), 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) [2024-06-28 01:08:30,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:30,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-28 01:08:30,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:33,689 INFO L124 PetriNetUnfolderBase]: 4607/7679 cut-off events. [2024-06-28 01:08:33,689 INFO L125 PetriNetUnfolderBase]: For 412661/412661 co-relation queries the response was YES. [2024-06-28 01:08:33,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89145 conditions, 7679 events. 4607/7679 cut-off events. For 412661/412661 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 47886 event pairs, 125 based on Foata normal form. 18/7697 useless extension candidates. Maximal degree in co-relation 88266. Up to 1849 conditions per place. [2024-06-28 01:08:33,829 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 728 selfloop transitions, 630 changer transitions 4/1365 dead transitions. [2024-06-28 01:08:33,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 1365 transitions, 37000 flow [2024-06-28 01:08:33,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 01:08:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 01:08:33,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 207 transitions. [2024-06-28 01:08:33,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190283400809717 [2024-06-28 01:08:33,831 INFO L175 Difference]: Start difference. First operand has 389 places, 1187 transitions, 30310 flow. Second operand 19 states and 207 transitions. [2024-06-28 01:08:33,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 1365 transitions, 37000 flow [2024-06-28 01:08:36,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 1365 transitions, 36480 flow, removed 171 selfloop flow, removed 6 redundant places. [2024-06-28 01:08:36,646 INFO L231 Difference]: Finished difference. Result has 407 places, 1245 transitions, 33062 flow [2024-06-28 01:08:36,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=29741, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=33062, PETRI_PLACES=407, PETRI_TRANSITIONS=1245} [2024-06-28 01:08:36,647 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 379 predicate places. [2024-06-28 01:08:36,647 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1245 transitions, 33062 flow [2024-06-28 01:08:36,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 21 states have internal predecessors, (155), 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) [2024-06-28 01:08:36,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:36,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:36,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:36,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-28 01:08:36,860 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:36,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:36,860 INFO L85 PathProgramCache]: Analyzing trace with hash 473003996, now seen corresponding path program 13 times [2024-06-28 01:08:36,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:36,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604403153] [2024-06-28 01:08:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:36,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:36,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:36,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604403153] [2024-06-28 01:08:36,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604403153] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:36,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501959754] [2024-06-28 01:08:36,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-28 01:08:36,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:36,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:36,987 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) [2024-06-28 01:08:36,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-28 01:08:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:37,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 01:08:37,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:37,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:37,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501959754] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:37,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:37,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-06-28 01:08:37,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178896837] [2024-06-28 01:08:37,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:37,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-28 01:08:37,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:37,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-28 01:08:37,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2024-06-28 01:08:37,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-28 01:08:37,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1245 transitions, 33062 flow. Second operand has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 21 states have internal predecessors, (155), 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) [2024-06-28 01:08:37,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:37,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-28 01:08:37,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:40,727 INFO L124 PetriNetUnfolderBase]: 4948/8211 cut-off events. [2024-06-28 01:08:40,727 INFO L125 PetriNetUnfolderBase]: For 448942/448942 co-relation queries the response was YES. [2024-06-28 01:08:40,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96845 conditions, 8211 events. 4948/8211 cut-off events. For 448942/448942 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 51724 event pairs, 222 based on Foata normal form. 28/8239 useless extension candidates. Maximal degree in co-relation 95961. Up to 6410 conditions per place. [2024-06-28 01:08:40,833 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1209 selfloop transitions, 210 changer transitions 4/1426 dead transitions. [2024-06-28 01:08:40,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 1426 transitions, 39869 flow [2024-06-28 01:08:40,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-28 01:08:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-28 01:08:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 215 transitions. [2024-06-28 01:08:40,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41346153846153844 [2024-06-28 01:08:40,837 INFO L175 Difference]: Start difference. First operand has 407 places, 1245 transitions, 33062 flow. Second operand 20 states and 215 transitions. [2024-06-28 01:08:40,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 1426 transitions, 39869 flow [2024-06-28 01:08:44,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 1426 transitions, 39778 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-28 01:08:44,056 INFO L231 Difference]: Finished difference. Result has 424 places, 1307 transitions, 35172 flow [2024-06-28 01:08:44,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=32911, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1070, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=35172, PETRI_PLACES=424, PETRI_TRANSITIONS=1307} [2024-06-28 01:08:44,065 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 396 predicate places. [2024-06-28 01:08:44,065 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 1307 transitions, 35172 flow [2024-06-28 01:08:44,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 21 states have internal predecessors, (155), 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) [2024-06-28 01:08:44,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:44,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:44,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-06-28 01:08:44,266 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,SelfDestructingSolverStorable16 [2024-06-28 01:08:44,266 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:44,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:44,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1030937604, now seen corresponding path program 14 times [2024-06-28 01:08:44,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:44,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657204493] [2024-06-28 01:08:44,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:44,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:44,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:44,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657204493] [2024-06-28 01:08:44,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657204493] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:44,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833432757] [2024-06-28 01:08:44,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:08:44,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:44,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:44,346 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:08:44,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-28 01:08:44,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:08:44,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:44,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 01:08:44,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:44,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:08:44,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833432757] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:44,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:44,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-06-28 01:08:44,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049598951] [2024-06-28 01:08:44,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:44,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-28 01:08:44,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:44,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-28 01:08:44,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-06-28 01:08:44,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-28 01:08:44,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 1307 transitions, 35172 flow. Second operand has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 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) [2024-06-28 01:08:44,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:44,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-28 01:08:44,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:48,648 INFO L124 PetriNetUnfolderBase]: 5263/8749 cut-off events. [2024-06-28 01:08:48,648 INFO L125 PetriNetUnfolderBase]: For 523679/523679 co-relation queries the response was YES. [2024-06-28 01:08:48,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106800 conditions, 8749 events. 5263/8749 cut-off events. For 523679/523679 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 55949 event pairs, 71 based on Foata normal form. 75/8824 useless extension candidates. Maximal degree in co-relation 106524. Up to 3799 conditions per place. [2024-06-28 01:08:48,786 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 763 selfloop transitions, 775 changer transitions 1/1542 dead transitions. [2024-06-28 01:08:48,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 1542 transitions, 43252 flow [2024-06-28 01:08:48,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-28 01:08:48,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-28 01:08:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 267 transitions. [2024-06-28 01:08:48,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107692307692308 [2024-06-28 01:08:48,788 INFO L175 Difference]: Start difference. First operand has 424 places, 1307 transitions, 35172 flow. Second operand 25 states and 267 transitions. [2024-06-28 01:08:48,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 1542 transitions, 43252 flow [2024-06-28 01:08:52,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1542 transitions, 42962 flow, removed 100 selfloop flow, removed 8 redundant places. [2024-06-28 01:08:52,876 INFO L231 Difference]: Finished difference. Result has 449 places, 1385 transitions, 40060 flow [2024-06-28 01:08:52,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=34740, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=704, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=40060, PETRI_PLACES=449, PETRI_TRANSITIONS=1385} [2024-06-28 01:08:52,877 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 421 predicate places. [2024-06-28 01:08:52,877 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 1385 transitions, 40060 flow [2024-06-28 01:08:52,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 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) [2024-06-28 01:08:52,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:52,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:52,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:53,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:53,083 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:53,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:53,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1841308272, now seen corresponding path program 15 times [2024-06-28 01:08:53,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:53,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212298417] [2024-06-28 01:08:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:53,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:53,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:53,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212298417] [2024-06-28 01:08:53,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212298417] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:53,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047303290] [2024-06-28 01:08:53,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:08:53,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:53,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:53,164 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:08:53,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-28 01:08:53,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-28 01:08:53,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:53,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 01:08:53,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:08:53,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:08:53,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047303290] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:53,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:53,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-06-28 01:08:53,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298655588] [2024-06-28 01:08:53,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:53,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-28 01:08:53,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:53,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-28 01:08:53,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2024-06-28 01:08:53,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-28 01:08:53,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 1385 transitions, 40060 flow. Second operand has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 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) [2024-06-28 01:08:53,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:53,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-28 01:08:53,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:57,617 INFO L124 PetriNetUnfolderBase]: 5378/8902 cut-off events. [2024-06-28 01:08:57,618 INFO L125 PetriNetUnfolderBase]: For 622411/622411 co-relation queries the response was YES. [2024-06-28 01:08:57,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115286 conditions, 8902 events. 5378/8902 cut-off events. For 622411/622411 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 56349 event pairs, 250 based on Foata normal form. 8/8910 useless extension candidates. Maximal degree in co-relation 114572. Up to 7660 conditions per place. [2024-06-28 01:08:57,781 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1335 selfloop transitions, 154 changer transitions 2/1494 dead transitions. [2024-06-28 01:08:57,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 1494 transitions, 45919 flow [2024-06-28 01:08:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 01:08:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 01:08:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 163 transitions. [2024-06-28 01:08:57,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41794871794871796 [2024-06-28 01:08:57,783 INFO L175 Difference]: Start difference. First operand has 449 places, 1385 transitions, 40060 flow. Second operand 15 states and 163 transitions. [2024-06-28 01:08:57,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 1494 transitions, 45919 flow [2024-06-28 01:09:01,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1494 transitions, 45542 flow, removed 101 selfloop flow, removed 18 redundant places. [2024-06-28 01:09:02,007 INFO L231 Difference]: Finished difference. Result has 447 places, 1423 transitions, 41473 flow [2024-06-28 01:09:02,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=39685, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=41473, PETRI_PLACES=447, PETRI_TRANSITIONS=1423} [2024-06-28 01:09:02,009 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 419 predicate places. [2024-06-28 01:09:02,009 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 1423 transitions, 41473 flow [2024-06-28 01:09:02,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 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) [2024-06-28 01:09:02,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:09:02,010 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:09:02,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-28 01:09:02,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:09:02,222 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:09:02,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:09:02,223 INFO L85 PathProgramCache]: Analyzing trace with hash 308822128, now seen corresponding path program 16 times [2024-06-28 01:09:02,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:09:02,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740804924] [2024-06-28 01:09:02,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:09:02,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:09:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:02,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:09:02,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740804924] [2024-06-28 01:09:02,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740804924] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:09:02,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949669867] [2024-06-28 01:09:02,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 01:09:02,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:09:02,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:09:02,291 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:09:02,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-28 01:09:02,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 01:09:02,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:09:02,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-28 01:09:02,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:09:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:02,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:09:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:02,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949669867] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:09:02,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:09:02,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 8 [2024-06-28 01:09:02,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689288600] [2024-06-28 01:09:02,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:09:02,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:09:02,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:09:02,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:09:02,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:09:02,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-28 01:09:02,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 1423 transitions, 41473 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 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) [2024-06-28 01:09:02,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:09:02,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-28 01:09:02,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:09:08,449 INFO L124 PetriNetUnfolderBase]: 7224/13027 cut-off events. [2024-06-28 01:09:08,449 INFO L125 PetriNetUnfolderBase]: For 824142/824856 co-relation queries the response was YES. [2024-06-28 01:09:08,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168227 conditions, 13027 events. 7224/13027 cut-off events. For 824142/824856 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 99742 event pairs, 314 based on Foata normal form. 133/12969 useless extension candidates. Maximal degree in co-relation 166945. Up to 4240 conditions per place. [2024-06-28 01:09:08,718 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 1358 selfloop transitions, 462 changer transitions 238/2414 dead transitions. [2024-06-28 01:09:08,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 2414 transitions, 74658 flow [2024-06-28 01:09:08,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:09:08,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:09:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-28 01:09:08,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2024-06-28 01:09:08,720 INFO L175 Difference]: Start difference. First operand has 447 places, 1423 transitions, 41473 flow. Second operand 5 states and 90 transitions. [2024-06-28 01:09:08,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 2414 transitions, 74658 flow [2024-06-28 01:09:17,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 2414 transitions, 74458 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-28 01:09:17,220 INFO L231 Difference]: Finished difference. Result has 443 places, 1727 transitions, 54723 flow [2024-06-28 01:09:17,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=41336, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=54723, PETRI_PLACES=443, PETRI_TRANSITIONS=1727} [2024-06-28 01:09:17,221 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 415 predicate places. [2024-06-28 01:09:17,222 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 1727 transitions, 54723 flow [2024-06-28 01:09:17,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 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) [2024-06-28 01:09:17,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:09:17,222 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:09:17,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-06-28 01:09:17,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:09:17,438 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:09:17,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:09:17,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1823286366, now seen corresponding path program 17 times [2024-06-28 01:09:17,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:09:17,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644705303] [2024-06-28 01:09:17,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:09:17,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:09:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:17,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:09:17,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644705303] [2024-06-28 01:09:17,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644705303] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:09:17,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330373282] [2024-06-28 01:09:17,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-28 01:09:17,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:09:17,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:09:17,608 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:09:17,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-28 01:09:17,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-06-28 01:09:17,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:09:17,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 01:09:17,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:09:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:17,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:09:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:17,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330373282] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:09:17,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:09:17,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2024-06-28 01:09:17,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860240315] [2024-06-28 01:09:17,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:09:17,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-28 01:09:17,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:09:17,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-28 01:09:17,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-06-28 01:09:17,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-28 01:09:17,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 1727 transitions, 54723 flow. Second operand has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 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) [2024-06-28 01:09:17,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:09:17,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-28 01:09:17,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:09:26,400 INFO L124 PetriNetUnfolderBase]: 9430/15632 cut-off events. [2024-06-28 01:09:26,401 INFO L125 PetriNetUnfolderBase]: For 1029673/1029673 co-relation queries the response was YES. [2024-06-28 01:09:26,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207829 conditions, 15632 events. 9430/15632 cut-off events. For 1029673/1029673 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 108436 event pairs, 199 based on Foata normal form. 90/15722 useless extension candidates. Maximal degree in co-relation 206486. Up to 7343 conditions per place. [2024-06-28 01:09:26,827 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1070 selfloop transitions, 1019 changer transitions 104/2196 dead transitions. [2024-06-28 01:09:26,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 2196 transitions, 70098 flow [2024-06-28 01:09:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-28 01:09:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-28 01:09:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 212 transitions. [2024-06-28 01:09:26,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796380090497738 [2024-06-28 01:09:26,828 INFO L175 Difference]: Start difference. First operand has 443 places, 1727 transitions, 54723 flow. Second operand 17 states and 212 transitions. [2024-06-28 01:09:26,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 2196 transitions, 70098 flow [2024-06-28 01:09:36,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 2196 transitions, 69778 flow, removed 154 selfloop flow, removed 2 redundant places. [2024-06-28 01:09:37,036 INFO L231 Difference]: Finished difference. Result has 462 places, 1831 transitions, 61695 flow [2024-06-28 01:09:37,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=54400, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=922, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=765, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=61695, PETRI_PLACES=462, PETRI_TRANSITIONS=1831} [2024-06-28 01:09:37,038 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 434 predicate places. [2024-06-28 01:09:37,038 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 1831 transitions, 61695 flow [2024-06-28 01:09:37,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 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) [2024-06-28 01:09:37,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:09:37,039 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:09:37,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-28 01:09:37,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:09:37,251 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:09:37,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:09:37,251 INFO L85 PathProgramCache]: Analyzing trace with hash 142860332, now seen corresponding path program 18 times [2024-06-28 01:09:37,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:09:37,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485104085] [2024-06-28 01:09:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:09:37,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:09:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:37,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:09:37,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485104085] [2024-06-28 01:09:37,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485104085] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:09:37,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665768309] [2024-06-28 01:09:37,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-28 01:09:37,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:09:37,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:09:37,388 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:09:37,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-28 01:09:37,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-28 01:09:37,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:09:37,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-28 01:09:37,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:09:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:37,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:09:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:37,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665768309] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:09:37,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:09:37,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2024-06-28 01:09:37,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959608573] [2024-06-28 01:09:37,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:09:37,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-28 01:09:37,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:09:37,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-28 01:09:37,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2024-06-28 01:09:37,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-28 01:09:37,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 1831 transitions, 61695 flow. Second operand has 27 states, 27 states have (on average 7.444444444444445) internal successors, (201), 27 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) [2024-06-28 01:09:37,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:09:37,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-28 01:09:37,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand