./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/triangular-longest-1.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/pthread/triangular-longest-1.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/triangular-longest-1.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 00:50:51,527 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:50:51,575 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:50:51,583 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:50:51,584 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:50:51,606 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:50:51,609 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:50:51,609 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:50:51,610 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:50:51,611 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:50:51,611 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:50:51,612 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:50:51,612 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:50:51,615 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:50:51,615 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:50:51,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:50:51,616 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:50:51,616 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:50:51,616 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:50:51,616 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:50:51,617 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:50:51,617 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:50:51,617 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:50:51,618 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:50:51,618 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:50:51,618 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:50:51,618 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:50:51,618 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:50:51,619 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:50:51,619 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:50:51,620 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:50:51,620 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:50:51,620 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:50:51,621 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:50:51,621 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:50:51,621 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:50:51,621 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:50:51,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:50:51,621 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:50:51,622 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:50:51,622 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:50:51,622 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:50:51,622 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:50:51,622 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 00:50:51,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:50:51,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:50:51,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:50:51,908 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:50:51,908 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:50:51,909 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2024-06-28 00:50:52,944 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:50:53,186 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:50:53,187 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2024-06-28 00:50:53,198 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/089b67666/3e1c4de4895a4623836e29775b8c390e/FLAG2c28f190f [2024-06-28 00:50:53,212 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/089b67666/3e1c4de4895a4623836e29775b8c390e [2024-06-28 00:50:53,214 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:50:53,215 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:50:53,216 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/triangular-longest-1.yml/witness.yml [2024-06-28 00:50:53,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:50:53,297 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:50:53,299 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:50:53,300 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:50:53,303 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:50:53,304 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:50:53" (1/2) ... [2024-06-28 00:50:53,306 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3a0169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:53, skipping insertion in model container [2024-06-28 00:50:53,306 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:50:53" (1/2) ... [2024-06-28 00:50:53,307 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2f39a90e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:53, skipping insertion in model container [2024-06-28 00:50:53,308 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:50:53" (2/2) ... [2024-06-28 00:50:53,308 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3a0169 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:53, skipping insertion in model container [2024-06-28 00:50:53,308 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:50:53" (2/2) ... [2024-06-28 00:50:53,308 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:50:53,333 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:50:53,334 INFO L97 edCorrectnessWitness]: Location invariant before [L714-L714] ((! multithreaded || (4 <= j && j % 2 == 0)) && (! multithreaded || (((3 <= i && 4 <= j) && i % 2 == 1) && j % 2 == 0))) && (! multithreaded || (3 <= i && i % 2 == 1)) [2024-06-28 00:50:53,335 INFO L97 edCorrectnessWitness]: Location invariant before [L715-L715] ((! multithreaded || (4 <= j && j % 2 == 0)) && (! multithreaded || (((3 <= i && 4 <= j) && i % 2 == 1) && j % 2 == 0))) && (! multithreaded || (3 <= i && i % 2 == 1)) [2024-06-28 00:50:53,335 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:50:53,335 INFO L106 edCorrectnessWitness]: ghost_update [L713-L713] multithreaded = 1; [2024-06-28 00:50:53,370 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:50:53,635 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2024-06-28 00:50:53,639 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:50:53,645 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:50:53,720 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2024-06-28 00:50:53,720 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:50:53,757 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:50:53,758 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:53 WrapperNode [2024-06-28 00:50:53,758 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:50:53,759 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:50:53,759 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:50:53,759 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:50:53,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:53" (1/1) ... [2024-06-28 00:50:53,775 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:53" (1/1) ... [2024-06-28 00:50:53,794 INFO L138 Inliner]: procedures = 168, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2024-06-28 00:50:53,794 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:50:53,795 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:50:53,795 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:50:53,795 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:50:53,803 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:53" (1/1) ... [2024-06-28 00:50:53,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:53" (1/1) ... [2024-06-28 00:50:53,818 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:53" (1/1) ... [2024-06-28 00:50:53,835 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 00:50:53,836 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:53" (1/1) ... [2024-06-28 00:50:53,836 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:53" (1/1) ... [2024-06-28 00:50:53,853 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:53" (1/1) ... [2024-06-28 00:50:53,857 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:53" (1/1) ... [2024-06-28 00:50:53,863 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:53" (1/1) ... [2024-06-28 00:50:53,864 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:53" (1/1) ... [2024-06-28 00:50:53,866 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:50:53,866 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:50:53,867 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:50:53,867 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:50:53,897 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:53" (1/1) ... [2024-06-28 00:50:53,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:50:53,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:53,920 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 00:50:53,933 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 00:50:53,951 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-28 00:50:53,952 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-28 00:50:53,952 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-28 00:50:53,952 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-28 00:50:53,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:50:53,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:50:53,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:50:53,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:50:53,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:50:53,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:50:53,955 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 00:50:54,080 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:50:54,081 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:50:54,260 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:50:54,260 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:50:54,310 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:50:54,310 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-28 00:50:54,311 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:50:54 BoogieIcfgContainer [2024-06-28 00:50:54,311 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:50:54,312 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:50:54,312 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:50:54,315 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:50:54,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:50:53" (1/4) ... [2024-06-28 00:50:54,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fc6ca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:50:54, skipping insertion in model container [2024-06-28 00:50:54,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:50:53" (2/4) ... [2024-06-28 00:50:54,318 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fc6ca6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:50:54, skipping insertion in model container [2024-06-28 00:50:54,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:53" (3/4) ... [2024-06-28 00:50:54,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fc6ca6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:50:54, skipping insertion in model container [2024-06-28 00:50:54,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:50:54" (4/4) ... [2024-06-28 00:50:54,320 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2024-06-28 00:50:54,334 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:50:54,334 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 00:50:54,334 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:50:54,369 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:50:54,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 29 transitions, 66 flow [2024-06-28 00:50:54,424 INFO L124 PetriNetUnfolderBase]: 3/27 cut-off events. [2024-06-28 00:50:54,424 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:50:54,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 3/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-06-28 00:50:54,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 29 transitions, 66 flow [2024-06-28 00:50:54,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 60 flow [2024-06-28 00:50:54,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:50:54,450 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;@1549236e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:50:54,451 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-28 00:50:54,455 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:50:54,455 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:50:54,456 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:50:54,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:54,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:50:54,457 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 00:50:54,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:54,463 INFO L85 PathProgramCache]: Analyzing trace with hash 176651994, now seen corresponding path program 1 times [2024-06-28 00:50:54,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:54,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194984657] [2024-06-28 00:50:54,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:54,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:54,980 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 00:50:54,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:54,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194984657] [2024-06-28 00:50:54,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194984657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:54,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:54,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:50:54,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988157003] [2024-06-28 00:50:54,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:54,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:50:54,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:55,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:50:55,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:50:55,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-28 00:50:55,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 00:50:55,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:55,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-28 00:50:55,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:55,121 INFO L124 PetriNetUnfolderBase]: 172/337 cut-off events. [2024-06-28 00:50:55,121 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-28 00:50:55,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 337 events. 172/337 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1436 event pairs, 45 based on Foata normal form. 20/331 useless extension candidates. Maximal degree in co-relation 625. Up to 211 conditions per place. [2024-06-28 00:50:55,125 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 23 selfloop transitions, 3 changer transitions 2/37 dead transitions. [2024-06-28 00:50:55,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 139 flow [2024-06-28 00:50:55,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:50:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:50:55,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-06-28 00:50:55,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7471264367816092 [2024-06-28 00:50:55,135 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 60 flow. Second operand 3 states and 65 transitions. [2024-06-28 00:50:55,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 139 flow [2024-06-28 00:50:55,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 37 transitions, 136 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 00:50:55,139 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 75 flow [2024-06-28 00:50:55,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2024-06-28 00:50:55,145 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2024-06-28 00:50:55,145 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 75 flow [2024-06-28 00:50:55,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 00:50:55,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:55,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:55,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:50:55,146 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 00:50:55,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:55,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1314428841, now seen corresponding path program 1 times [2024-06-28 00:50:55,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:55,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606704854] [2024-06-28 00:50:55,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:55,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:55,358 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 00:50:55,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:55,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606704854] [2024-06-28 00:50:55,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606704854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:55,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:55,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:50:55,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315628372] [2024-06-28 00:50:55,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:55,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:50:55,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:50:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:50:55,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-28 00:50:55,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 00:50:55,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:55,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-28 00:50:55,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:55,500 INFO L124 PetriNetUnfolderBase]: 160/331 cut-off events. [2024-06-28 00:50:55,502 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-06-28 00:50:55,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 331 events. 160/331 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1438 event pairs, 37 based on Foata normal form. 21/342 useless extension candidates. Maximal degree in co-relation 697. Up to 109 conditions per place. [2024-06-28 00:50:55,507 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 33 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2024-06-28 00:50:55,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 47 transitions, 199 flow [2024-06-28 00:50:55,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:50:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:50:55,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-28 00:50:55,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6620689655172414 [2024-06-28 00:50:55,511 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 75 flow. Second operand 5 states and 96 transitions. [2024-06-28 00:50:55,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 47 transitions, 199 flow [2024-06-28 00:50:55,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 47 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:50:55,516 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 98 flow [2024-06-28 00:50:55,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2024-06-28 00:50:55,517 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2024-06-28 00:50:55,517 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 98 flow [2024-06-28 00:50:55,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 00:50:55,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:55,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:55,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:50:55,519 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 00:50:55,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:55,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1917013662, now seen corresponding path program 1 times [2024-06-28 00:50:55,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:55,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233572378] [2024-06-28 00:50:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:55,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:55,734 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 00:50:55,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:55,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233572378] [2024-06-28 00:50:55,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233572378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:55,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:55,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:50:55,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111447172] [2024-06-28 00:50:55,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:55,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:50:55,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:55,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:50:55,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:50:55,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-28 00:50:55,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:50:55,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:55,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-28 00:50:55,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:55,838 INFO L124 PetriNetUnfolderBase]: 244/502 cut-off events. [2024-06-28 00:50:55,839 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2024-06-28 00:50:55,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 502 events. 244/502 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2451 event pairs, 88 based on Foata normal form. 18/504 useless extension candidates. Maximal degree in co-relation 1117. Up to 255 conditions per place. [2024-06-28 00:50:55,844 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 27 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-06-28 00:50:55,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 184 flow [2024-06-28 00:50:55,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:50:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:50:55,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-06-28 00:50:55,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103448275862069 [2024-06-28 00:50:55,847 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 98 flow. Second operand 5 states and 74 transitions. [2024-06-28 00:50:55,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 184 flow [2024-06-28 00:50:55,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 00:50:55,850 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 103 flow [2024-06-28 00:50:55,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2024-06-28 00:50:55,851 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-06-28 00:50:55,851 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 103 flow [2024-06-28 00:50:55,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:50:55,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:55,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:55,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:50:55,852 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 00:50:55,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:55,853 INFO L85 PathProgramCache]: Analyzing trace with hash 344931938, now seen corresponding path program 1 times [2024-06-28 00:50:55,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:55,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923460621] [2024-06-28 00:50:55,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:55,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:55,955 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 00:50:55,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:55,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923460621] [2024-06-28 00:50:55,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923460621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:55,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:55,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:50:55,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297659383] [2024-06-28 00:50:55,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:55,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:50:55,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:55,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:50:55,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:50:55,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-28 00:50:55,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 00:50:55,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:55,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-28 00:50:55,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:56,115 INFO L124 PetriNetUnfolderBase]: 595/1023 cut-off events. [2024-06-28 00:50:56,116 INFO L125 PetriNetUnfolderBase]: For 918/918 co-relation queries the response was YES. [2024-06-28 00:50:56,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2549 conditions, 1023 events. 595/1023 cut-off events. For 918/918 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4733 event pairs, 178 based on Foata normal form. 0/980 useless extension candidates. Maximal degree in co-relation 2532. Up to 544 conditions per place. [2024-06-28 00:50:56,120 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 34 selfloop transitions, 7 changer transitions 31/77 dead transitions. [2024-06-28 00:50:56,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 77 transitions, 416 flow [2024-06-28 00:50:56,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:50:56,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:50:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 00:50:56,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6077586206896551 [2024-06-28 00:50:56,122 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 103 flow. Second operand 8 states and 141 transitions. [2024-06-28 00:50:56,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 77 transitions, 416 flow [2024-06-28 00:50:56,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 77 transitions, 409 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 00:50:56,132 INFO L231 Difference]: Finished difference. Result has 48 places, 31 transitions, 158 flow [2024-06-28 00:50:56,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=158, PETRI_PLACES=48, PETRI_TRANSITIONS=31} [2024-06-28 00:50:56,134 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 17 predicate places. [2024-06-28 00:50:56,134 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 31 transitions, 158 flow [2024-06-28 00:50:56,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 00:50:56,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:56,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:56,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:50:56,135 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 00:50:56,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash 654878447, now seen corresponding path program 1 times [2024-06-28 00:50:56,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:56,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131816439] [2024-06-28 00:50:56,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:56,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:56,263 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 00:50:56,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:56,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131816439] [2024-06-28 00:50:56,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131816439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:56,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:56,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:50:56,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230333361] [2024-06-28 00:50:56,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:56,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:50:56,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:56,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:50:56,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:50:56,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-28 00:50:56,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 31 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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 00:50:56,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:56,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-28 00:50:56,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:56,409 INFO L124 PetriNetUnfolderBase]: 397/721 cut-off events. [2024-06-28 00:50:56,409 INFO L125 PetriNetUnfolderBase]: For 1105/1105 co-relation queries the response was YES. [2024-06-28 00:50:56,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2064 conditions, 721 events. 397/721 cut-off events. For 1105/1105 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3147 event pairs, 151 based on Foata normal form. 27/735 useless extension candidates. Maximal degree in co-relation 2041. Up to 400 conditions per place. [2024-06-28 00:50:56,413 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 30 selfloop transitions, 8 changer transitions 16/59 dead transitions. [2024-06-28 00:50:56,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 380 flow [2024-06-28 00:50:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:50:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:50:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 00:50:56,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804597701149425 [2024-06-28 00:50:56,416 INFO L175 Difference]: Start difference. First operand has 48 places, 31 transitions, 158 flow. Second operand 6 states and 101 transitions. [2024-06-28 00:50:56,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 380 flow [2024-06-28 00:50:56,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 360 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 00:50:56,423 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 190 flow [2024-06-28 00:50:56,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2024-06-28 00:50:56,427 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 18 predicate places. [2024-06-28 00:50:56,427 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 190 flow [2024-06-28 00:50:56,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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 00:50:56,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:56,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:56,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:50:56,430 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 00:50:56,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:56,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1435421146, now seen corresponding path program 1 times [2024-06-28 00:50:56,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:56,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479270759] [2024-06-28 00:50:56,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:56,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:56,505 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 00:50:56,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:56,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479270759] [2024-06-28 00:50:56,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479270759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:56,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:56,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:50:56,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707761055] [2024-06-28 00:50:56,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:56,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:50:56,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:56,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:50:56,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:50:56,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-28 00:50:56,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 190 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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 00:50:56,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:56,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-28 00:50:56,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:56,678 INFO L124 PetriNetUnfolderBase]: 379/682 cut-off events. [2024-06-28 00:50:56,678 INFO L125 PetriNetUnfolderBase]: For 1190/1190 co-relation queries the response was YES. [2024-06-28 00:50:56,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2063 conditions, 682 events. 379/682 cut-off events. For 1190/1190 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2864 event pairs, 115 based on Foata normal form. 27/702 useless extension candidates. Maximal degree in co-relation 2038. Up to 364 conditions per place. [2024-06-28 00:50:56,683 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 39 selfloop transitions, 9 changer transitions 24/77 dead transitions. [2024-06-28 00:50:56,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 77 transitions, 492 flow [2024-06-28 00:50:56,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:50:56,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:50:56,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 00:50:56,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5905172413793104 [2024-06-28 00:50:56,685 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 190 flow. Second operand 8 states and 137 transitions. [2024-06-28 00:50:56,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 77 transitions, 492 flow [2024-06-28 00:50:56,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 465 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 00:50:56,689 INFO L231 Difference]: Finished difference. Result has 55 places, 36 transitions, 233 flow [2024-06-28 00:50:56,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=233, PETRI_PLACES=55, PETRI_TRANSITIONS=36} [2024-06-28 00:50:56,692 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-28 00:50:56,692 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 36 transitions, 233 flow [2024-06-28 00:50:56,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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 00:50:56,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:56,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:56,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:50:56,693 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 00:50:56,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:56,693 INFO L85 PathProgramCache]: Analyzing trace with hash 259230455, now seen corresponding path program 1 times [2024-06-28 00:50:56,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:56,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045900806] [2024-06-28 00:50:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:56,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:56,791 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 00:50:56,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:56,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045900806] [2024-06-28 00:50:56,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045900806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:56,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:56,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:50:56,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369433918] [2024-06-28 00:50:56,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:56,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:50:56,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:56,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:50:56,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:50:56,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-28 00:50:56,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 36 transitions, 233 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 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 00:50:56,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:56,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-28 00:50:56,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:56,981 INFO L124 PetriNetUnfolderBase]: 352/644 cut-off events. [2024-06-28 00:50:56,981 INFO L125 PetriNetUnfolderBase]: For 1650/1650 co-relation queries the response was YES. [2024-06-28 00:50:56,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 644 events. 352/644 cut-off events. For 1650/1650 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2592 event pairs, 70 based on Foata normal form. 27/658 useless extension candidates. Maximal degree in co-relation 2063. Up to 145 conditions per place. [2024-06-28 00:50:56,985 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 39 selfloop transitions, 16 changer transitions 28/88 dead transitions. [2024-06-28 00:50:56,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 88 transitions, 609 flow [2024-06-28 00:50:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:50:56,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:50:56,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-28 00:50:56,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5724137931034483 [2024-06-28 00:50:56,986 INFO L175 Difference]: Start difference. First operand has 55 places, 36 transitions, 233 flow. Second operand 10 states and 166 transitions. [2024-06-28 00:50:56,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 88 transitions, 609 flow [2024-06-28 00:50:56,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 88 transitions, 594 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 00:50:56,990 INFO L231 Difference]: Finished difference. Result has 64 places, 39 transitions, 309 flow [2024-06-28 00:50:56,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=309, PETRI_PLACES=64, PETRI_TRANSITIONS=39} [2024-06-28 00:50:56,991 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 33 predicate places. [2024-06-28 00:50:56,991 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 39 transitions, 309 flow [2024-06-28 00:50:56,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 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 00:50:56,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:56,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:56,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:50:56,992 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 00:50:56,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:56,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1320585101, now seen corresponding path program 2 times [2024-06-28 00:50:56,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:56,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019901990] [2024-06-28 00:50:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:56,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:57,056 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 00:50:57,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:57,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019901990] [2024-06-28 00:50:57,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019901990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:57,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:57,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:50:57,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175221599] [2024-06-28 00:50:57,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:57,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:50:57,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:57,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:50:57,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:50:57,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-28 00:50:57,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 39 transitions, 309 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 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 00:50:57,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:57,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-28 00:50:57,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:57,269 INFO L124 PetriNetUnfolderBase]: 379/688 cut-off events. [2024-06-28 00:50:57,269 INFO L125 PetriNetUnfolderBase]: For 2662/2662 co-relation queries the response was YES. [2024-06-28 00:50:57,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2455 conditions, 688 events. 379/688 cut-off events. For 2662/2662 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2902 event pairs, 106 based on Foata normal form. 18/699 useless extension candidates. Maximal degree in co-relation 2422. Up to 331 conditions per place. [2024-06-28 00:50:57,273 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 49 selfloop transitions, 14 changer transitions 25/93 dead transitions. [2024-06-28 00:50:57,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 93 transitions, 713 flow [2024-06-28 00:50:57,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:50:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:50:57,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-28 00:50:57,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.567398119122257 [2024-06-28 00:50:57,300 INFO L175 Difference]: Start difference. First operand has 64 places, 39 transitions, 309 flow. Second operand 11 states and 181 transitions. [2024-06-28 00:50:57,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 93 transitions, 713 flow [2024-06-28 00:50:57,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 93 transitions, 668 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 00:50:57,305 INFO L231 Difference]: Finished difference. Result has 69 places, 42 transitions, 357 flow [2024-06-28 00:50:57,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=357, PETRI_PLACES=69, PETRI_TRANSITIONS=42} [2024-06-28 00:50:57,306 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 38 predicate places. [2024-06-28 00:50:57,306 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 42 transitions, 357 flow [2024-06-28 00:50:57,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 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 00:50:57,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:57,307 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:57,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:50:57,307 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 00:50:57,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:57,307 INFO L85 PathProgramCache]: Analyzing trace with hash -456201350, now seen corresponding path program 1 times [2024-06-28 00:50:57,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:57,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106229984] [2024-06-28 00:50:57,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:57,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:57,387 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 00:50:57,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:57,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106229984] [2024-06-28 00:50:57,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106229984] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:57,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598199448] [2024-06-28 00:50:57,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:57,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:57,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:57,390 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 00:50:57,419 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 00:50:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:57,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-28 00:50:57,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:57,526 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 00:50:57,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:57,615 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 00:50:57,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598199448] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:57,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:57,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-06-28 00:50:57,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959811877] [2024-06-28 00:50:57,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:57,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-28 00:50:57,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:57,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-28 00:50:57,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-06-28 00:50:57,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-28 00:50:57,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 42 transitions, 357 flow. Second operand has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 14 states have internal predecessors, (157), 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 00:50:57,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:57,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-28 00:50:57,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:58,056 INFO L124 PetriNetUnfolderBase]: 613/1103 cut-off events. [2024-06-28 00:50:58,056 INFO L125 PetriNetUnfolderBase]: For 5933/5933 co-relation queries the response was YES. [2024-06-28 00:50:58,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4158 conditions, 1103 events. 613/1103 cut-off events. For 5933/5933 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4748 event pairs, 64 based on Foata normal form. 45/1135 useless extension candidates. Maximal degree in co-relation 4124. Up to 247 conditions per place. [2024-06-28 00:50:58,062 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 64 selfloop transitions, 31 changer transitions 56/156 dead transitions. [2024-06-28 00:50:58,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 156 transitions, 1297 flow [2024-06-28 00:50:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 00:50:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 00:50:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 313 transitions. [2024-06-28 00:50:58,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680580762250453 [2024-06-28 00:50:58,064 INFO L175 Difference]: Start difference. First operand has 69 places, 42 transitions, 357 flow. Second operand 19 states and 313 transitions. [2024-06-28 00:50:58,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 156 transitions, 1297 flow [2024-06-28 00:50:58,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 156 transitions, 1219 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-28 00:50:58,077 INFO L231 Difference]: Finished difference. Result has 87 places, 58 transitions, 646 flow [2024-06-28 00:50:58,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=646, PETRI_PLACES=87, PETRI_TRANSITIONS=58} [2024-06-28 00:50:58,078 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2024-06-28 00:50:58,078 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 58 transitions, 646 flow [2024-06-28 00:50:58,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 14 states have internal predecessors, (157), 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 00:50:58,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:58,078 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:58,092 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 00:50:58,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:58,293 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 00:50:58,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:58,293 INFO L85 PathProgramCache]: Analyzing trace with hash -768213302, now seen corresponding path program 1 times [2024-06-28 00:50:58,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:58,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581653626] [2024-06-28 00:50:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:58,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 00:50:58,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:58,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581653626] [2024-06-28 00:50:58,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581653626] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:58,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986335894] [2024-06-28 00:50:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:58,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:58,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:58,405 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 00:50:58,407 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 00:50:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:58,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-28 00:50:58,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 00:50:58,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 00:50:58,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986335894] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:58,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:58,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-06-28 00:50:58,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168573580] [2024-06-28 00:50:58,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:58,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-28 00:50:58,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:58,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-28 00:50:58,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-06-28 00:50:58,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-28 00:50:58,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 58 transitions, 646 flow. Second operand has 17 states, 17 states have (on average 11.411764705882353) internal successors, (194), 17 states have internal predecessors, (194), 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 00:50:58,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:58,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-28 00:50:58,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:59,373 INFO L124 PetriNetUnfolderBase]: 1297/2391 cut-off events. [2024-06-28 00:50:59,373 INFO L125 PetriNetUnfolderBase]: For 21818/21818 co-relation queries the response was YES. [2024-06-28 00:50:59,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10436 conditions, 2391 events. 1297/2391 cut-off events. For 21818/21818 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 12372 event pairs, 136 based on Foata normal form. 81/2465 useless extension candidates. Maximal degree in co-relation 10395. Up to 571 conditions per place. [2024-06-28 00:50:59,388 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 127 selfloop transitions, 64 changer transitions 91/287 dead transitions. [2024-06-28 00:50:59,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 287 transitions, 3111 flow [2024-06-28 00:50:59,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-06-28 00:50:59,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-06-28 00:50:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 523 transitions. [2024-06-28 00:50:59,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5635775862068966 [2024-06-28 00:50:59,391 INFO L175 Difference]: Start difference. First operand has 87 places, 58 transitions, 646 flow. Second operand 32 states and 523 transitions. [2024-06-28 00:50:59,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 287 transitions, 3111 flow [2024-06-28 00:50:59,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 287 transitions, 2345 flow, removed 363 selfloop flow, removed 11 redundant places. [2024-06-28 00:50:59,424 INFO L231 Difference]: Finished difference. Result has 125 places, 104 transitions, 1152 flow [2024-06-28 00:50:59,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1152, PETRI_PLACES=125, PETRI_TRANSITIONS=104} [2024-06-28 00:50:59,425 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 94 predicate places. [2024-06-28 00:50:59,426 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 104 transitions, 1152 flow [2024-06-28 00:50:59,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.411764705882353) internal successors, (194), 17 states have internal predecessors, (194), 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 00:50:59,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:59,426 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:59,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-28 00:50:59,636 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,SelfDestructingSolverStorable9 [2024-06-28 00:50:59,637 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 00:50:59,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:59,638 INFO L85 PathProgramCache]: Analyzing trace with hash 519321440, now seen corresponding path program 2 times [2024-06-28 00:50:59,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:59,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810911012] [2024-06-28 00:50:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:59,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 00:50:59,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:59,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810911012] [2024-06-28 00:50:59,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810911012] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:59,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943744052] [2024-06-28 00:50:59,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 00:50:59,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:59,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:59,757 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 00:50:59,760 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 00:50:59,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 00:50:59,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 00:50:59,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-28 00:50:59,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 00:50:59,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 00:50:59,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943744052] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:59,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:59,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-06-28 00:50:59,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090239454] [2024-06-28 00:50:59,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:59,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-28 00:50:59,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:59,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-28 00:50:59,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-06-28 00:51:00,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-28 00:51:00,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 104 transitions, 1152 flow. Second operand has 18 states, 18 states have (on average 11.38888888888889) internal successors, (205), 18 states have internal predecessors, (205), 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 00:51:00,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:00,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-28 00:51:00,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:00,894 INFO L124 PetriNetUnfolderBase]: 1684/3112 cut-off events. [2024-06-28 00:51:00,895 INFO L125 PetriNetUnfolderBase]: For 81721/81721 co-relation queries the response was YES. [2024-06-28 00:51:00,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16499 conditions, 3112 events. 1684/3112 cut-off events. For 81721/81721 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 17291 event pairs, 56 based on Foata normal form. 117/3222 useless extension candidates. Maximal degree in co-relation 16441. Up to 607 conditions per place. [2024-06-28 00:51:00,917 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 124 selfloop transitions, 105 changer transitions 115/349 dead transitions. [2024-06-28 00:51:00,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 349 transitions, 4581 flow [2024-06-28 00:51:00,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-06-28 00:51:00,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-06-28 00:51:00,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 589 transitions. [2024-06-28 00:51:00,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564176245210728 [2024-06-28 00:51:00,919 INFO L175 Difference]: Start difference. First operand has 125 places, 104 transitions, 1152 flow. Second operand 36 states and 589 transitions. [2024-06-28 00:51:00,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 349 transitions, 4581 flow [2024-06-28 00:51:01,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 349 transitions, 3942 flow, removed 305 selfloop flow, removed 17 redundant places. [2024-06-28 00:51:01,087 INFO L231 Difference]: Finished difference. Result has 157 places, 139 transitions, 1940 flow [2024-06-28 00:51:01,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1940, PETRI_PLACES=157, PETRI_TRANSITIONS=139} [2024-06-28 00:51:01,087 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 126 predicate places. [2024-06-28 00:51:01,088 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 139 transitions, 1940 flow [2024-06-28 00:51:01,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.38888888888889) internal successors, (205), 18 states have internal predecessors, (205), 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 00:51:01,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:01,088 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:01,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-06-28 00:51:01,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:51:01,289 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 00:51:01,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash -928583469, now seen corresponding path program 3 times [2024-06-28 00:51:01,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:01,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522812335] [2024-06-28 00:51:01,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:01,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:01,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:01,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522812335] [2024-06-28 00:51:01,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522812335] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:51:01,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488750809] [2024-06-28 00:51:01,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 00:51:01,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:51:01,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:51:01,429 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 00:51:01,448 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 00:51:01,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-06-28 00:51:01,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 00:51:01,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-28 00:51:01,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:51:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:01,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:51:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:01,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488750809] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:51:01,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:51:01,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-06-28 00:51:01,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260856883] [2024-06-28 00:51:01,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:51:01,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-28 00:51:01,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:01,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-28 00:51:01,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2024-06-28 00:51:01,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-28 00:51:01,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 139 transitions, 1940 flow. Second operand has 26 states, 26 states have (on average 11.115384615384615) internal successors, (289), 26 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:01,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:01,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-28 00:51:01,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:03,345 INFO L124 PetriNetUnfolderBase]: 2458/4495 cut-off events. [2024-06-28 00:51:03,345 INFO L125 PetriNetUnfolderBase]: For 202527/202527 co-relation queries the response was YES. [2024-06-28 00:51:03,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29508 conditions, 4495 events. 2458/4495 cut-off events. For 202527/202527 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 24198 event pairs, 88 based on Foata normal form. 99/4581 useless extension candidates. Maximal degree in co-relation 29437. Up to 901 conditions per place. [2024-06-28 00:51:03,389 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 162 selfloop transitions, 157 changer transitions 146/470 dead transitions. [2024-06-28 00:51:03,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 470 transitions, 8134 flow [2024-06-28 00:51:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-06-28 00:51:03,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-06-28 00:51:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 799 transitions. [2024-06-28 00:51:03,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622800844475722 [2024-06-28 00:51:03,392 INFO L175 Difference]: Start difference. First operand has 157 places, 139 transitions, 1940 flow. Second operand 49 states and 799 transitions. [2024-06-28 00:51:03,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 470 transitions, 8134 flow [2024-06-28 00:51:03,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 470 transitions, 6902 flow, removed 589 selfloop flow, removed 20 redundant places. [2024-06-28 00:51:03,590 INFO L231 Difference]: Finished difference. Result has 207 places, 196 transitions, 3316 flow [2024-06-28 00:51:03,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1560, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=3316, PETRI_PLACES=207, PETRI_TRANSITIONS=196} [2024-06-28 00:51:03,591 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 176 predicate places. [2024-06-28 00:51:03,591 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 196 transitions, 3316 flow [2024-06-28 00:51:03,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 11.115384615384615) internal successors, (289), 26 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:03,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:03,592 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:03,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-06-28 00:51:03,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:51:03,802 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 00:51:03,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:03,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1926043066, now seen corresponding path program 4 times [2024-06-28 00:51:03,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:03,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666320750] [2024-06-28 00:51:03,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:03,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 00:51:04,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:04,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666320750] [2024-06-28 00:51:04,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666320750] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:51:04,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455169845] [2024-06-28 00:51:04,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 00:51:04,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:51:04,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:51:04,131 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 00:51:04,132 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 00:51:04,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 00:51:04,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 00:51:04,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-28 00:51:04,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:51:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 00:51:04,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:51:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 00:51:04,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455169845] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:51:04,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:51:04,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2024-06-28 00:51:04,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911670149] [2024-06-28 00:51:04,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:51:04,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-06-28 00:51:04,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:04,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-06-28 00:51:04,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1288, Unknown=0, NotChecked=0, Total=1640 [2024-06-28 00:51:04,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-28 00:51:04,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 196 transitions, 3316 flow. Second operand has 41 states, 41 states have (on average 11.195121951219512) internal successors, (459), 41 states have internal predecessors, (459), 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 00:51:04,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:04,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-28 00:51:04,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:07,437 INFO L124 PetriNetUnfolderBase]: 3268/6243 cut-off events. [2024-06-28 00:51:07,438 INFO L125 PetriNetUnfolderBase]: For 597359/597359 co-relation queries the response was YES. [2024-06-28 00:51:07,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55095 conditions, 6243 events. 3268/6243 cut-off events. For 597359/597359 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 35173 event pairs, 610 based on Foata normal form. 189/6425 useless extension candidates. Maximal degree in co-relation 55002. Up to 2395 conditions per place. [2024-06-28 00:51:07,496 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 268 selfloop transitions, 142 changer transitions 235/650 dead transitions. [2024-06-28 00:51:07,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 650 transitions, 15645 flow [2024-06-28 00:51:07,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-06-28 00:51:07,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-06-28 00:51:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 1081 transitions. [2024-06-28 00:51:07,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481744421906694 [2024-06-28 00:51:07,499 INFO L175 Difference]: Start difference. First operand has 207 places, 196 transitions, 3316 flow. Second operand 68 states and 1081 transitions. [2024-06-28 00:51:07,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 650 transitions, 15645 flow [2024-06-28 00:51:08,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 650 transitions, 12317 flow, removed 1644 selfloop flow, removed 17 redundant places. [2024-06-28 00:51:08,296 INFO L231 Difference]: Finished difference. Result has 287 places, 265 transitions, 4964 flow [2024-06-28 00:51:08,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2496, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=4964, PETRI_PLACES=287, PETRI_TRANSITIONS=265} [2024-06-28 00:51:08,296 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 256 predicate places. [2024-06-28 00:51:08,297 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 265 transitions, 4964 flow [2024-06-28 00:51:08,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 11.195121951219512) internal successors, (459), 41 states have internal predecessors, (459), 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 00:51:08,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:08,300 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:08,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-06-28 00:51:08,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-06-28 00:51:08,502 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 00:51:08,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:08,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1997897686, now seen corresponding path program 5 times [2024-06-28 00:51:08,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:08,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168806000] [2024-06-28 00:51:08,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:08,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 00:51:08,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:08,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168806000] [2024-06-28 00:51:08,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168806000] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:51:08,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519288519] [2024-06-28 00:51:08,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-28 00:51:08,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:51:08,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:51:08,779 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 00:51:08,804 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 00:51:08,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-06-28 00:51:08,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 00:51:08,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-28 00:51:08,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:51:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 00:51:08,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:51:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 00:51:09,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519288519] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:51:09,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:51:09,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2024-06-28 00:51:09,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957900778] [2024-06-28 00:51:09,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:51:09,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-06-28 00:51:09,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:09,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-06-28 00:51:09,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1342, Unknown=0, NotChecked=0, Total=1640 [2024-06-28 00:51:09,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-28 00:51:09,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 265 transitions, 4964 flow. Second operand has 41 states, 41 states have (on average 11.195121951219512) internal successors, (459), 41 states have internal predecessors, (459), 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 00:51:09,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:09,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-28 00:51:09,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:13,086 INFO L124 PetriNetUnfolderBase]: 4438/8779 cut-off events. [2024-06-28 00:51:13,086 INFO L125 PetriNetUnfolderBase]: For 1585054/1585054 co-relation queries the response was YES. [2024-06-28 00:51:13,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92150 conditions, 8779 events. 4438/8779 cut-off events. For 1585054/1585054 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 54937 event pairs, 212 based on Foata normal form. 189/8961 useless extension candidates. Maximal degree in co-relation 92026. Up to 2071 conditions per place. [2024-06-28 00:51:13,194 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 241 selfloop transitions, 327 changer transitions 251/824 dead transitions. [2024-06-28 00:51:13,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 824 transitions, 22321 flow [2024-06-28 00:51:13,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-06-28 00:51:13,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2024-06-28 00:51:13,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 1217 transitions. [2024-06-28 00:51:13,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521778584392014 [2024-06-28 00:51:13,197 INFO L175 Difference]: Start difference. First operand has 287 places, 265 transitions, 4964 flow. Second operand 76 states and 1217 transitions. [2024-06-28 00:51:13,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 824 transitions, 22321 flow [2024-06-28 00:51:17,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 824 transitions, 18646 flow, removed 1798 selfloop flow, removed 37 redundant places. [2024-06-28 00:51:17,437 INFO L231 Difference]: Finished difference. Result has 351 places, 388 transitions, 8368 flow [2024-06-28 00:51:17,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3767, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=8368, PETRI_PLACES=351, PETRI_TRANSITIONS=388} [2024-06-28 00:51:17,438 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 320 predicate places. [2024-06-28 00:51:17,438 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 388 transitions, 8368 flow [2024-06-28 00:51:17,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 11.195121951219512) internal successors, (459), 41 states have internal predecessors, (459), 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 00:51:17,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:17,439 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:17,449 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 00:51:17,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:51:17,641 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 00:51:17,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:17,642 INFO L85 PathProgramCache]: Analyzing trace with hash -139146498, now seen corresponding path program 6 times [2024-06-28 00:51:17,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:17,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281031297] [2024-06-28 00:51:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:17,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 00:51:17,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:17,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281031297] [2024-06-28 00:51:17,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281031297] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:51:17,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760620454] [2024-06-28 00:51:17,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-28 00:51:17,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:51:17,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:51:17,892 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 00:51:17,918 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 00:51:17,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-06-28 00:51:17,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 00:51:17,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-28 00:51:17,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:51:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 00:51:18,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:51:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 00:51:18,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760620454] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:51:18,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:51:18,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2024-06-28 00:51:18,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124232921] [2024-06-28 00:51:18,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:51:18,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-06-28 00:51:18,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:18,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-06-28 00:51:18,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1408, Unknown=0, NotChecked=0, Total=1722 [2024-06-28 00:51:18,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-28 00:51:18,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 388 transitions, 8368 flow. Second operand has 42 states, 42 states have (on average 11.214285714285714) internal successors, (471), 42 states have internal predecessors, (471), 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 00:51:18,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:18,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-28 00:51:18,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:23,949 INFO L124 PetriNetUnfolderBase]: 5986/11692 cut-off events. [2024-06-28 00:51:23,949 INFO L125 PetriNetUnfolderBase]: For 3382538/3382538 co-relation queries the response was YES. [2024-06-28 00:51:24,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147011 conditions, 11692 events. 5986/11692 cut-off events. For 3382538/3382538 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 75867 event pairs, 90 based on Foata normal form. 198/11883 useless extension candidates. Maximal degree in co-relation 146860. Up to 2773 conditions per place. [2024-06-28 00:51:24,238 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 278 selfloop transitions, 468 changer transitions 286/1037 dead transitions. [2024-06-28 00:51:24,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1037 transitions, 33404 flow [2024-06-28 00:51:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-06-28 00:51:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2024-06-28 00:51:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 1489 transitions. [2024-06-28 00:51:24,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558095952023988 [2024-06-28 00:51:24,248 INFO L175 Difference]: Start difference. First operand has 351 places, 388 transitions, 8368 flow. Second operand 92 states and 1489 transitions. [2024-06-28 00:51:24,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1037 transitions, 33404 flow [2024-06-28 00:51:31,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1037 transitions, 27670 flow, removed 2782 selfloop flow, removed 40 redundant places. [2024-06-28 00:51:31,568 INFO L231 Difference]: Finished difference. Result has 439 places, 509 transitions, 12356 flow [2024-06-28 00:51:31,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6086, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=12356, PETRI_PLACES=439, PETRI_TRANSITIONS=509} [2024-06-28 00:51:31,568 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 408 predicate places. [2024-06-28 00:51:31,569 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 509 transitions, 12356 flow [2024-06-28 00:51:31,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 11.214285714285714) internal successors, (471), 42 states have internal predecessors, (471), 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 00:51:31,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:31,569 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:31,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-06-28 00:51:31,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:51:31,770 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 00:51:31,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:31,770 INFO L85 PathProgramCache]: Analyzing trace with hash -763796139, now seen corresponding path program 7 times [2024-06-28 00:51:31,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:31,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777360153] [2024-06-28 00:51:31,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:31,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:32,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:32,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777360153] [2024-06-28 00:51:32,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777360153] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:51:32,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422577946] [2024-06-28 00:51:32,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-28 00:51:32,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:51:32,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:51:32,204 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 00:51:32,231 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 00:51:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:32,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-28 00:51:32,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:51:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:32,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:51:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:32,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422577946] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:51:32,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:51:32,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2024-06-28 00:51:32,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863958310] [2024-06-28 00:51:32,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:51:32,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-06-28 00:51:32,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:32,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-06-28 00:51:32,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1673, Unknown=0, NotChecked=0, Total=2162 [2024-06-28 00:51:33,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-28 00:51:33,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 509 transitions, 12356 flow. Second operand has 47 states, 47 states have (on average 11.127659574468085) internal successors, (523), 47 states have internal predecessors, (523), 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 00:51:33,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:33,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-28 00:51:33,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:41,047 INFO L124 PetriNetUnfolderBase]: 7408/14486 cut-off events. [2024-06-28 00:51:41,047 INFO L125 PetriNetUnfolderBase]: For 6863130/6863130 co-relation queries the response was YES. [2024-06-28 00:51:41,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222857 conditions, 14486 events. 7408/14486 cut-off events. For 6863130/6863130 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 93013 event pairs, 52 based on Foata normal form. 153/14626 useless extension candidates. Maximal degree in co-relation 222668. Up to 3415 conditions per place. [2024-06-28 00:51:41,312 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 341 selfloop transitions, 577 changer transitions 273/1196 dead transitions. [2024-06-28 00:51:41,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 1196 transitions, 47103 flow [2024-06-28 00:51:41,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-06-28 00:51:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2024-06-28 00:51:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 1639 transitions. [2024-06-28 00:51:41,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595766473199044 [2024-06-28 00:51:41,316 INFO L175 Difference]: Start difference. First operand has 439 places, 509 transitions, 12356 flow. Second operand 101 states and 1639 transitions. [2024-06-28 00:51:41,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 1196 transitions, 47103 flow [2024-06-28 00:51:58,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 1196 transitions, 35774 flow, removed 5495 selfloop flow, removed 49 redundant places. [2024-06-28 00:51:58,675 INFO L231 Difference]: Finished difference. Result has 517 places, 622 transitions, 15531 flow [2024-06-28 00:51:58,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8333, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=15531, PETRI_PLACES=517, PETRI_TRANSITIONS=622} [2024-06-28 00:51:58,676 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 486 predicate places. [2024-06-28 00:51:58,676 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 622 transitions, 15531 flow [2024-06-28 00:51:58,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 11.127659574468085) internal successors, (523), 47 states have internal predecessors, (523), 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 00:51:58,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:58,677 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:58,689 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 00:51:58,877 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,SelfDestructingSolverStorable15 [2024-06-28 00:51:58,877 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 00:51:58,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:58,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2092356297, now seen corresponding path program 8 times [2024-06-28 00:51:58,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:58,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821049758] [2024-06-28 00:51:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:58,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 0 proven. 1046 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:59,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:59,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821049758] [2024-06-28 00:51:59,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821049758] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:51:59,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552599930] [2024-06-28 00:51:59,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 00:51:59,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:51:59,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:51:59,626 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 00:51:59,628 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 00:51:59,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 00:51:59,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 00:51:59,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 45 conjunts are in the unsatisfiable core [2024-06-28 00:51:59,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:51:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 0 proven. 1046 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:59,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:52:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 0 proven. 1046 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:00,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552599930] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:52:00,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:52:00,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 49 [2024-06-28 00:52:00,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321910269] [2024-06-28 00:52:00,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:52:00,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-06-28 00:52:00,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:00,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-06-28 00:52:00,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2024-06-28 00:52:00,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-28 00:52:00,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 622 transitions, 15531 flow. Second operand has 50 states, 50 states have (on average 11.14) internal successors, (557), 50 states have internal predecessors, (557), 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 00:52:00,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:00,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-28 00:52:00,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:10,094 INFO L124 PetriNetUnfolderBase]: 8092/15805 cut-off events. [2024-06-28 00:52:10,094 INFO L125 PetriNetUnfolderBase]: For 9018829/9018829 co-relation queries the response was YES. [2024-06-28 00:52:10,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250276 conditions, 15805 events. 8092/15805 cut-off events. For 9018829/9018829 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 102068 event pairs, 52 based on Foata normal form. 108/15906 useless extension candidates. Maximal degree in co-relation 250060. Up to 3733 conditions per place. [2024-06-28 00:52:10,377 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 361 selfloop transitions, 648 changer transitions 231/1245 dead transitions. [2024-06-28 00:52:10,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 1245 transitions, 45215 flow [2024-06-28 00:52:10,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-06-28 00:52:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2024-06-28 00:52:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 1579 transitions. [2024-06-28 00:52:10,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555594651653765 [2024-06-28 00:52:10,383 INFO L175 Difference]: Start difference. First operand has 517 places, 622 transitions, 15531 flow. Second operand 98 states and 1579 transitions. [2024-06-28 00:52:10,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 1245 transitions, 45215 flow [2024-06-28 00:52:40,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 1245 transitions, 34630 flow, removed 5168 selfloop flow, removed 38 redundant places. [2024-06-28 00:52:40,174 INFO L231 Difference]: Finished difference. Result has 576 places, 692 transitions, 14881 flow [2024-06-28 00:52:40,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10950, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=14881, PETRI_PLACES=576, PETRI_TRANSITIONS=692} [2024-06-28 00:52:40,175 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 545 predicate places. [2024-06-28 00:52:40,175 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 692 transitions, 14881 flow [2024-06-28 00:52:40,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 11.14) internal successors, (557), 50 states have internal predecessors, (557), 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 00:52:40,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:40,176 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 21, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:40,187 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 00:52:40,376 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,SelfDestructingSolverStorable16 [2024-06-28 00:52:40,376 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 00:52:40,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:40,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1336150407, now seen corresponding path program 9 times [2024-06-28 00:52:40,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:40,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061599150] [2024-06-28 00:52:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:40,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 1098 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-28 00:52:40,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:40,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061599150] [2024-06-28 00:52:40,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061599150] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:52:40,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137883423] [2024-06-28 00:52:40,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 00:52:40,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:52:40,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:52:40,736 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 00:52:40,737 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 00:52:40,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2024-06-28 00:52:40,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 00:52:40,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 22 conjunts are in the unsatisfiable core [2024-06-28 00:52:40,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:52:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 1156 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-28 00:52:40,932 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-28 00:52:40,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137883423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:40,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-28 00:52:40,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2024-06-28 00:52:40,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336540919] [2024-06-28 00:52:40,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:40,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-28 00:52:40,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:40,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-28 00:52:40,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2024-06-28 00:52:40,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 29 [2024-06-28 00:52:40,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 692 transitions, 14881 flow. Second operand has 23 states, 23 states have (on average 16.956521739130434) internal successors, (390), 23 states have internal predecessors, (390), 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 00:52:40,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:40,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 29 [2024-06-28 00:52:40,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand