./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/array-eq-symm.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c ./goblint.2024-06-19_11-23-25.files/protection/array-eq-symm.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:01:54,160 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:01:54,254 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:01:54,261 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:01:54,261 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:01:54,294 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:01:54,295 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:01:54,295 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:01:54,296 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:01:54,300 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:01:54,300 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:01:54,301 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:01:54,302 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:01:54,303 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:01:54,303 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:01:54,303 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:01:54,304 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:01:54,304 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:01:54,304 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:01:54,305 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:01:54,305 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:01:54,305 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:01:54,306 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:01:54,306 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:01:54,306 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:01:54,306 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:01:54,307 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:01:54,307 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:01:54,307 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:01:54,308 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:01:54,309 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:01:54,309 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:01:54,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:01:54,309 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:01:54,310 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:01:54,310 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:01:54,310 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:01:54,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:01:54,310 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:01:54,311 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:01:54,311 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:01:54,311 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:01:54,311 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:01:54,312 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:01:54,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:01:54,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:01:54,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:01:54,588 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:01:54,589 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:01:54,590 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2024-06-27 18:01:55,686 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:01:55,877 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:01:55,879 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2024-06-27 18:01:55,889 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51a89b69e/25aca188e2eb4544b8bad5ad788d6638/FLAGd06725236 [2024-06-27 18:01:55,905 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51a89b69e/25aca188e2eb4544b8bad5ad788d6638 [2024-06-27 18:01:55,908 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:01:55,908 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:01:55,909 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/array-eq-symm.wvr.yml/witness.yml [2024-06-27 18:01:56,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:01:56,003 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:01:56,004 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:01:56,004 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:01:56,009 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:01:56,010 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:01:55" (1/2) ... [2024-06-27 18:01:56,011 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b37e856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:01:56, skipping insertion in model container [2024-06-27 18:01:56,011 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:01:55" (1/2) ... [2024-06-27 18:01:56,014 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d5059be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:01:56, skipping insertion in model container [2024-06-27 18:01:56,015 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:01:56" (2/2) ... [2024-06-27 18:01:56,016 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b37e856 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:01:56, skipping insertion in model container [2024-06-27 18:01:56,016 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:01:56" (2/2) ... [2024-06-27 18:01:56,016 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:01:56,036 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:01:56,037 INFO L97 edCorrectnessWitness]: Location invariant before [L80-L80] (! multithreaded || 0 <= i_BA) && (! multithreaded || 0 <= i_AB) [2024-06-27 18:01:56,038 INFO L97 edCorrectnessWitness]: Location invariant before [L81-L81] (! multithreaded || 0 <= i_BA) && (! multithreaded || 0 <= i_AB) [2024-06-27 18:01:56,038 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:01:56,038 INFO L106 edCorrectnessWitness]: ghost_update [L79-L79] multithreaded = 1; [2024-06-27 18:01:56,058 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:01:56,236 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c[2277,2290] [2024-06-27 18:01:56,244 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:01:56,253 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:01:56,311 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c[2277,2290] [2024-06-27 18:01:56,314 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:01:56,333 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:01:56,334 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:01:56 WrapperNode [2024-06-27 18:01:56,334 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:01:56,335 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:01:56,335 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:01:56,335 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:01:56,342 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 27.06 06:01:56" (1/1) ... [2024-06-27 18:01:56,349 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 27.06 06:01:56" (1/1) ... [2024-06-27 18:01:56,381 INFO L138 Inliner]: procedures = 22, calls = 19, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 110 [2024-06-27 18:01:56,382 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:01:56,383 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:01:56,383 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:01:56,383 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:01:56,402 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:01:56" (1/1) ... [2024-06-27 18:01:56,402 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:01:56" (1/1) ... [2024-06-27 18:01:56,421 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:01:56" (1/1) ... [2024-06-27 18:01:56,434 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-27 18:01:56,440 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:01:56" (1/1) ... [2024-06-27 18:01:56,440 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:01:56" (1/1) ... [2024-06-27 18:01:56,450 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:01:56" (1/1) ... [2024-06-27 18:01:56,457 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:01:56" (1/1) ... [2024-06-27 18:01:56,459 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:01:56" (1/1) ... [2024-06-27 18:01:56,464 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:01:56" (1/1) ... [2024-06-27 18:01:56,466 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:01:56,468 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:01:56,469 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:01:56,469 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:01:56,470 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:01:56" (1/1) ... [2024-06-27 18:01:56,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:01:56,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:01:56,497 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 18:01:56,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 18:01:56,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:01:56,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 18:01:56,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 18:01:56,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 18:01:56,539 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 18:01:56,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:01:56,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:01:56,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:01:56,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:01:56,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 18:01:56,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:01:56,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:01:56,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:01:56,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:01:56,542 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 18:01:56,654 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:01:56,656 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:01:56,920 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:01:56,920 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:01:57,187 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:01:57,189 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-06-27 18:01:57,189 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:01:57 BoogieIcfgContainer [2024-06-27 18:01:57,189 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:01:57,192 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:01:57,192 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:01:57,195 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:01:57,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:01:55" (1/4) ... [2024-06-27 18:01:57,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc01019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:01:57, skipping insertion in model container [2024-06-27 18:01:57,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:01:56" (2/4) ... [2024-06-27 18:01:57,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc01019 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:01:57, skipping insertion in model container [2024-06-27 18:01:57,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:01:56" (3/4) ... [2024-06-27 18:01:57,199 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc01019 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:01:57, skipping insertion in model container [2024-06-27 18:01:57,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:01:57" (4/4) ... [2024-06-27 18:01:57,200 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2024-06-27 18:01:57,218 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:01:57,218 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 18:01:57,218 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:01:57,268 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 18:01:57,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 33 transitions, 80 flow [2024-06-27 18:01:57,340 INFO L124 PetriNetUnfolderBase]: 6/31 cut-off events. [2024-06-27 18:01:57,340 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 18:01:57,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 6/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-06-27 18:01:57,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 33 transitions, 80 flow [2024-06-27 18:01:57,357 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 30 transitions, 72 flow [2024-06-27 18:01:57,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:01:57,373 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;@76d0ff42, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:01:57,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 18:01:57,379 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:01:57,380 INFO L124 PetriNetUnfolderBase]: 4/13 cut-off events. [2024-06-27 18:01:57,380 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:01:57,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:57,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:57,381 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)] === [2024-06-27 18:01:57,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:57,389 INFO L85 PathProgramCache]: Analyzing trace with hash -703603354, now seen corresponding path program 1 times [2024-06-27 18:01:57,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:57,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069406038] [2024-06-27 18:01:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:57,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:57,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:57,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069406038] [2024-06-27 18:01:57,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069406038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:57,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:57,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:01:57,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419779967] [2024-06-27 18:01:57,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:57,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:01:57,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:57,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:01:57,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:01:57,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:01:57,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:57,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:57,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:01:57,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:57,949 INFO L124 PetriNetUnfolderBase]: 264/425 cut-off events. [2024-06-27 18:01:57,949 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-27 18:01:57,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 425 events. 264/425 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1580 event pairs, 70 based on Foata normal form. 20/311 useless extension candidates. Maximal degree in co-relation 775. Up to 262 conditions per place. [2024-06-27 18:01:57,955 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 40 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-06-27 18:01:57,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 199 flow [2024-06-27 18:01:57,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:01:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:01:57,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-06-27 18:01:57,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565656565656566 [2024-06-27 18:01:57,967 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 72 flow. Second operand 3 states and 65 transitions. [2024-06-27 18:01:57,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 199 flow [2024-06-27 18:01:57,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 47 transitions, 185 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 18:01:57,973 INFO L231 Difference]: Finished difference. Result has 30 places, 31 transitions, 78 flow [2024-06-27 18:01:57,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=30, PETRI_TRANSITIONS=31} [2024-06-27 18:01:57,978 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-06-27 18:01:57,978 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 78 flow [2024-06-27 18:01:57,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:57,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:57,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:57,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:01:57,980 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)] === [2024-06-27 18:01:57,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:57,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1595094412, now seen corresponding path program 1 times [2024-06-27 18:01:57,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:57,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233814907] [2024-06-27 18:01:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:57,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:58,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:58,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233814907] [2024-06-27 18:01:58,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233814907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:58,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:58,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:01:58,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916395969] [2024-06-27 18:01:58,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:58,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:01:58,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:58,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:01:58,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:01:58,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:01:58,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:58,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:58,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:01:58,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:58,284 INFO L124 PetriNetUnfolderBase]: 206/343 cut-off events. [2024-06-27 18:01:58,285 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-27 18:01:58,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 343 events. 206/343 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1272 event pairs, 52 based on Foata normal form. 24/286 useless extension candidates. Maximal degree in co-relation 310. Up to 179 conditions per place. [2024-06-27 18:01:58,293 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 38 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-06-27 18:01:58,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 45 transitions, 185 flow [2024-06-27 18:01:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:01:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:01:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-06-27 18:01:58,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-06-27 18:01:58,298 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 78 flow. Second operand 4 states and 70 transitions. [2024-06-27 18:01:58,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 45 transitions, 185 flow [2024-06-27 18:01:58,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 45 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:01:58,301 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 72 flow [2024-06-27 18:01:58,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-06-27 18:01:58,303 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-06-27 18:01:58,303 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 72 flow [2024-06-27 18:01:58,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:58,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:58,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:58,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:01:58,307 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:01:58,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:58,311 INFO L85 PathProgramCache]: Analyzing trace with hash -733798241, now seen corresponding path program 1 times [2024-06-27 18:01:58,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:58,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701468043] [2024-06-27 18:01:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:58,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:58,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:58,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701468043] [2024-06-27 18:01:58,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701468043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:58,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:58,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:01:58,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815281423] [2024-06-27 18:01:58,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:58,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:01:58,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:58,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:01:58,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:01:58,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:01:58,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:58,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:58,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:01:58,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:58,595 INFO L124 PetriNetUnfolderBase]: 264/433 cut-off events. [2024-06-27 18:01:58,595 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2024-06-27 18:01:58,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912 conditions, 433 events. 264/433 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1664 event pairs, 52 based on Foata normal form. 1/333 useless extension candidates. Maximal degree in co-relation 476. Up to 295 conditions per place. [2024-06-27 18:01:58,598 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 36 selfloop transitions, 3 changer transitions 1/45 dead transitions. [2024-06-27 18:01:58,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 45 transitions, 191 flow [2024-06-27 18:01:58,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:01:58,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:01:58,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-06-27 18:01:58,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6161616161616161 [2024-06-27 18:01:58,600 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 72 flow. Second operand 3 states and 61 transitions. [2024-06-27 18:01:58,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 45 transitions, 191 flow [2024-06-27 18:01:58,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 45 transitions, 187 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:01:58,603 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 91 flow [2024-06-27 18:01:58,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2024-06-27 18:01:58,605 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2024-06-27 18:01:58,605 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 91 flow [2024-06-27 18:01:58,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:58,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:58,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:58,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:01:58,606 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)] === [2024-06-27 18:01:58,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:58,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1599461055, now seen corresponding path program 1 times [2024-06-27 18:01:58,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:58,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299196021] [2024-06-27 18:01:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:58,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:58,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:58,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299196021] [2024-06-27 18:01:58,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299196021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:58,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:58,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:01:58,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460457142] [2024-06-27 18:01:58,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:58,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:01:58,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:58,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:01:58,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:01:58,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-27 18:01:58,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:58,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:58,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-27 18:01:58,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:58,865 INFO L124 PetriNetUnfolderBase]: 337/604 cut-off events. [2024-06-27 18:01:58,865 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2024-06-27 18:01:58,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1317 conditions, 604 events. 337/604 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2755 event pairs, 212 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 859. Up to 397 conditions per place. [2024-06-27 18:01:58,869 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 42 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-06-27 18:01:58,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 51 transitions, 234 flow [2024-06-27 18:01:58,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:01:58,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:01:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-27 18:01:58,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-27 18:01:58,873 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 91 flow. Second operand 5 states and 88 transitions. [2024-06-27 18:01:58,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 51 transitions, 234 flow [2024-06-27 18:01:58,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 51 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:01:58,875 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 116 flow [2024-06-27 18:01:58,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2024-06-27 18:01:58,878 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-06-27 18:01:58,878 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 116 flow [2024-06-27 18:01:58,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:58,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:58,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:58,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:01:58,879 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)] === [2024-06-27 18:01:58,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash -673997473, now seen corresponding path program 1 times [2024-06-27 18:01:58,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:58,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356772610] [2024-06-27 18:01:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:58,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:58,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:58,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356772610] [2024-06-27 18:01:58,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356772610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:58,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:58,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:01:58,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785927039] [2024-06-27 18:01:58,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:58,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:01:58,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:58,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:01:58,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:01:58,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-27 18:01:58,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:58,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:58,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-27 18:01:58,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:59,101 INFO L124 PetriNetUnfolderBase]: 276/502 cut-off events. [2024-06-27 18:01:59,102 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-06-27 18:01:59,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1119 conditions, 502 events. 276/502 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2162 event pairs, 172 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 967. Up to 397 conditions per place. [2024-06-27 18:01:59,105 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 25 selfloop transitions, 2 changer transitions 14/46 dead transitions. [2024-06-27 18:01:59,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 46 transitions, 226 flow [2024-06-27 18:01:59,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:01:59,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:01:59,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-27 18:01:59,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-06-27 18:01:59,111 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 116 flow. Second operand 5 states and 84 transitions. [2024-06-27 18:01:59,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 46 transitions, 226 flow [2024-06-27 18:01:59,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 222 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 18:01:59,115 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 106 flow [2024-06-27 18:01:59,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2024-06-27 18:01:59,122 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-27 18:01:59,122 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 106 flow [2024-06-27 18:01:59,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:59,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:59,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:59,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:01:59,123 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)] === [2024-06-27 18:01:59,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:59,124 INFO L85 PathProgramCache]: Analyzing trace with hash 71841754, now seen corresponding path program 1 times [2024-06-27 18:01:59,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:59,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340935877] [2024-06-27 18:01:59,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:59,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:01:59,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:59,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340935877] [2024-06-27 18:01:59,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340935877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:59,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:59,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:01:59,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125862408] [2024-06-27 18:01:59,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:59,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:01:59,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:59,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:01:59,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:01:59,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-27 18:01:59,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:59,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:59,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-27 18:01:59,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:59,377 INFO L124 PetriNetUnfolderBase]: 349/604 cut-off events. [2024-06-27 18:01:59,377 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-06-27 18:01:59,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1400 conditions, 604 events. 349/604 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2691 event pairs, 160 based on Foata normal form. 19/616 useless extension candidates. Maximal degree in co-relation 1382. Up to 228 conditions per place. [2024-06-27 18:01:59,381 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 55 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2024-06-27 18:01:59,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 321 flow [2024-06-27 18:01:59,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:01:59,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:01:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-27 18:01:59,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242424242424243 [2024-06-27 18:01:59,383 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 106 flow. Second operand 5 states and 103 transitions. [2024-06-27 18:01:59,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 321 flow [2024-06-27 18:01:59,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 66 transitions, 303 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 18:01:59,386 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 122 flow [2024-06-27 18:01:59,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-06-27 18:01:59,387 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-06-27 18:01:59,387 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 122 flow [2024-06-27 18:01:59,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:59,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:59,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:59,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:01:59,388 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)] === [2024-06-27 18:01:59,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash 426416632, now seen corresponding path program 1 times [2024-06-27 18:01:59,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:59,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375413688] [2024-06-27 18:01:59,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:59,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:01:59,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:59,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375413688] [2024-06-27 18:01:59,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375413688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:59,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:59,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:01:59,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479134546] [2024-06-27 18:01:59,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:59,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:01:59,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:59,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:01:59,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:01:59,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-27 18:01:59,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:59,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:59,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-27 18:01:59,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:59,583 INFO L124 PetriNetUnfolderBase]: 275/501 cut-off events. [2024-06-27 18:01:59,583 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2024-06-27 18:01:59,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 501 events. 275/501 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2200 event pairs, 172 based on Foata normal form. 0/465 useless extension candidates. Maximal degree in co-relation 1114. Up to 397 conditions per place. [2024-06-27 18:01:59,587 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 25 selfloop transitions, 3 changer transitions 12/45 dead transitions. [2024-06-27 18:01:59,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 45 transitions, 228 flow [2024-06-27 18:01:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:01:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:01:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-27 18:01:59,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49696969696969695 [2024-06-27 18:01:59,588 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 122 flow. Second operand 5 states and 82 transitions. [2024-06-27 18:01:59,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 45 transitions, 228 flow [2024-06-27 18:01:59,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 220 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 18:01:59,590 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 116 flow [2024-06-27 18:01:59,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2024-06-27 18:01:59,591 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-27 18:01:59,591 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 116 flow [2024-06-27 18:01:59,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:59,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:59,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:59,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:01:59,592 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)] === [2024-06-27 18:01:59,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:59,593 INFO L85 PathProgramCache]: Analyzing trace with hash 534446221, now seen corresponding path program 1 times [2024-06-27 18:01:59,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:59,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003063442] [2024-06-27 18:01:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:59,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:01:59,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:59,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003063442] [2024-06-27 18:01:59,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003063442] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:01:59,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580644482] [2024-06-27 18:01:59,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:59,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:01:59,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:01:59,745 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:01:59,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 18:01:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:59,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 18:01:59,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:02:00,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:02:00,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580644482] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:00,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 18:02:00,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2024-06-27 18:02:00,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526608360] [2024-06-27 18:02:00,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:00,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:02:00,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:00,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:02:00,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-06-27 18:02:00,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-27 18:02:00,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 116 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:00,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:00,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-27 18:02:00,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:00,368 INFO L124 PetriNetUnfolderBase]: 333/584 cut-off events. [2024-06-27 18:02:00,368 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2024-06-27 18:02:00,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 584 events. 333/584 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2412 event pairs, 100 based on Foata normal form. 10/585 useless extension candidates. Maximal degree in co-relation 1357. Up to 235 conditions per place. [2024-06-27 18:02:00,372 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 44 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-27 18:02:00,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 57 transitions, 293 flow [2024-06-27 18:02:00,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:02:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:02:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 18:02:00,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-27 18:02:00,374 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 116 flow. Second operand 7 states and 112 transitions. [2024-06-27 18:02:00,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 57 transitions, 293 flow [2024-06-27 18:02:00,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 277 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 18:02:00,377 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 140 flow [2024-06-27 18:02:00,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=140, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 18:02:00,379 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 11 predicate places. [2024-06-27 18:02:00,379 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 140 flow [2024-06-27 18:02:00,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:00,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:00,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:00,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:00,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:00,599 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)] === [2024-06-27 18:02:00,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:00,599 INFO L85 PathProgramCache]: Analyzing trace with hash 889021099, now seen corresponding path program 1 times [2024-06-27 18:02:00,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:00,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308144052] [2024-06-27 18:02:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:00,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:02:00,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:00,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308144052] [2024-06-27 18:02:00,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308144052] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:00,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099026785] [2024-06-27 18:02:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:00,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:00,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:00,763 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:00,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 18:02:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:00,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 18:02:00,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:02:00,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:02:01,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099026785] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:01,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 18:02:01,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2024-06-27 18:02:01,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45915423] [2024-06-27 18:02:01,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:01,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:02:01,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:01,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:02:01,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-06-27 18:02:01,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-27 18:02:01,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:01,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:01,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-27 18:02:01,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:01,219 INFO L124 PetriNetUnfolderBase]: 363/666 cut-off events. [2024-06-27 18:02:01,219 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2024-06-27 18:02:01,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1651 conditions, 666 events. 363/666 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3087 event pairs, 141 based on Foata normal form. 0/638 useless extension candidates. Maximal degree in co-relation 1625. Up to 230 conditions per place. [2024-06-27 18:02:01,224 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 53 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-27 18:02:01,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 364 flow [2024-06-27 18:02:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:02:01,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:02:01,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 18:02:01,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2024-06-27 18:02:01,225 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 140 flow. Second operand 7 states and 118 transitions. [2024-06-27 18:02:01,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 364 flow [2024-06-27 18:02:01,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 66 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:02:01,229 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 166 flow [2024-06-27 18:02:01,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=166, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2024-06-27 18:02:01,230 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 17 predicate places. [2024-06-27 18:02:01,231 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 166 flow [2024-06-27 18:02:01,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:01,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:01,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:01,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:01,444 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,SelfDestructingSolverStorable8 [2024-06-27 18:02:01,445 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)] === [2024-06-27 18:02:01,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:01,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1066354698, now seen corresponding path program 1 times [2024-06-27 18:02:01,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:01,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373491692] [2024-06-27 18:02:01,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:01,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:01,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:01,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373491692] [2024-06-27 18:02:01,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373491692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:01,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:01,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:02:01,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882241480] [2024-06-27 18:02:01,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:01,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:02:01,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:01,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:02:01,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:02:01,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:01,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 166 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:01,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:01,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:01,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:02,097 INFO L124 PetriNetUnfolderBase]: 374/680 cut-off events. [2024-06-27 18:02:02,097 INFO L125 PetriNetUnfolderBase]: For 521/521 co-relation queries the response was YES. [2024-06-27 18:02:02,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 680 events. 374/680 cut-off events. For 521/521 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3026 event pairs, 109 based on Foata normal form. 4/680 useless extension candidates. Maximal degree in co-relation 1834. Up to 549 conditions per place. [2024-06-27 18:02:02,101 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 43 selfloop transitions, 11 changer transitions 5/64 dead transitions. [2024-06-27 18:02:02,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 371 flow [2024-06-27 18:02:02,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:02:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:02:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-27 18:02:02,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458874458874459 [2024-06-27 18:02:02,103 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 166 flow. Second operand 7 states and 103 transitions. [2024-06-27 18:02:02,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 371 flow [2024-06-27 18:02:02,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 353 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 18:02:02,106 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 231 flow [2024-06-27 18:02:02,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=231, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2024-06-27 18:02:02,107 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 21 predicate places. [2024-06-27 18:02:02,107 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 231 flow [2024-06-27 18:02:02,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:02,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:02,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:02,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:02:02,108 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)] === [2024-06-27 18:02:02,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:02,108 INFO L85 PathProgramCache]: Analyzing trace with hash 489233884, now seen corresponding path program 2 times [2024-06-27 18:02:02,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:02,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858711847] [2024-06-27 18:02:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:02,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:02,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:02,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858711847] [2024-06-27 18:02:02,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858711847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:02,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:02,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:02:02,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928229707] [2024-06-27 18:02:02,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:02,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:02:02,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:02,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:02:02,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:02:02,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:02,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 231 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:02,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:02,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:02,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:02,686 INFO L124 PetriNetUnfolderBase]: 372/677 cut-off events. [2024-06-27 18:02:02,686 INFO L125 PetriNetUnfolderBase]: For 597/600 co-relation queries the response was YES. [2024-06-27 18:02:02,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2033 conditions, 677 events. 372/677 cut-off events. For 597/600 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2889 event pairs, 125 based on Foata normal form. 6/679 useless extension candidates. Maximal degree in co-relation 2003. Up to 549 conditions per place. [2024-06-27 18:02:02,691 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 43 selfloop transitions, 12 changer transitions 8/68 dead transitions. [2024-06-27 18:02:02,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 462 flow [2024-06-27 18:02:02,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:02:02,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:02:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-27 18:02:02,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-27 18:02:02,693 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 231 flow. Second operand 7 states and 102 transitions. [2024-06-27 18:02:02,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 462 flow [2024-06-27 18:02:02,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 68 transitions, 444 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 18:02:02,697 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 297 flow [2024-06-27 18:02:02,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=297, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2024-06-27 18:02:02,698 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 28 predicate places. [2024-06-27 18:02:02,698 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 297 flow [2024-06-27 18:02:02,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:02,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:02,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:02,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:02:02,699 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)] === [2024-06-27 18:02:02,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:02,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1130160326, now seen corresponding path program 3 times [2024-06-27 18:02:02,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:02,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884776215] [2024-06-27 18:02:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:02,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:03,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:03,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884776215] [2024-06-27 18:02:03,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884776215] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:03,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811014712] [2024-06-27 18:02:03,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:02:03,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:03,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:03,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:03,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 18:02:03,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 18:02:03,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:03,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 18:02:03,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:03,386 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 18:02:03,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-06-27 18:02:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:03,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:03,523 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:02:03,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:02:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:03,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811014712] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:03,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:03,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2024-06-27 18:02:03,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549468530] [2024-06-27 18:02:03,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:03,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:02:03,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:03,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:02:03,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:02:03,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:03,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 297 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:03,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:03,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:03,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:03,903 INFO L124 PetriNetUnfolderBase]: 384/700 cut-off events. [2024-06-27 18:02:03,903 INFO L125 PetriNetUnfolderBase]: For 803/803 co-relation queries the response was YES. [2024-06-27 18:02:03,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 700 events. 384/700 cut-off events. For 803/803 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3074 event pairs, 52 based on Foata normal form. 14/711 useless extension candidates. Maximal degree in co-relation 2225. Up to 388 conditions per place. [2024-06-27 18:02:03,910 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 56 selfloop transitions, 16 changer transitions 3/80 dead transitions. [2024-06-27 18:02:03,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 558 flow [2024-06-27 18:02:03,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:02:03,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:02:03,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 18:02:03,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-27 18:02:03,912 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 297 flow. Second operand 8 states and 124 transitions. [2024-06-27 18:02:03,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 558 flow [2024-06-27 18:02:03,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 540 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 18:02:03,918 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 325 flow [2024-06-27 18:02:03,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=325, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2024-06-27 18:02:03,920 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-06-27 18:02:03,920 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 325 flow [2024-06-27 18:02:03,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:03,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:03,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:03,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:04,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:04,139 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)] === [2024-06-27 18:02:04,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:04,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1307737570, now seen corresponding path program 1 times [2024-06-27 18:02:04,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:04,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054966559] [2024-06-27 18:02:04,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:04,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:04,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:04,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054966559] [2024-06-27 18:02:04,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054966559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:04,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:04,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:02:04,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116869872] [2024-06-27 18:02:04,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:04,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:02:04,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:04,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:02:04,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:02:04,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:04,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 325 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:04,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:04,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:04,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:04,795 INFO L124 PetriNetUnfolderBase]: 389/705 cut-off events. [2024-06-27 18:02:04,795 INFO L125 PetriNetUnfolderBase]: For 1061/1061 co-relation queries the response was YES. [2024-06-27 18:02:04,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2349 conditions, 705 events. 389/705 cut-off events. For 1061/1061 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3128 event pairs, 99 based on Foata normal form. 5/709 useless extension candidates. Maximal degree in co-relation 2314. Up to 583 conditions per place. [2024-06-27 18:02:04,801 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 43 selfloop transitions, 13 changer transitions 13/74 dead transitions. [2024-06-27 18:02:04,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 557 flow [2024-06-27 18:02:04,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:02:04,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:02:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-27 18:02:04,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-27 18:02:04,803 INFO L175 Difference]: Start difference. First operand has 63 places, 48 transitions, 325 flow. Second operand 7 states and 107 transitions. [2024-06-27 18:02:04,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 557 flow [2024-06-27 18:02:04,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 502 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 18:02:04,811 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 318 flow [2024-06-27 18:02:04,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=318, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2024-06-27 18:02:04,812 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-06-27 18:02:04,812 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 318 flow [2024-06-27 18:02:04,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:04,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:04,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:04,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:02:04,813 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)] === [2024-06-27 18:02:04,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:04,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1440635664, now seen corresponding path program 2 times [2024-06-27 18:02:04,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:04,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216117800] [2024-06-27 18:02:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:04,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:05,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:05,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216117800] [2024-06-27 18:02:05,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216117800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:05,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:05,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:02:05,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369915595] [2024-06-27 18:02:05,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:05,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:02:05,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:05,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:02:05,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:02:05,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:05,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 318 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:05,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:05,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:05,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:05,366 INFO L124 PetriNetUnfolderBase]: 384/708 cut-off events. [2024-06-27 18:02:05,366 INFO L125 PetriNetUnfolderBase]: For 909/915 co-relation queries the response was YES. [2024-06-27 18:02:05,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2248 conditions, 708 events. 384/708 cut-off events. For 909/915 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3112 event pairs, 156 based on Foata normal form. 9/715 useless extension candidates. Maximal degree in co-relation 2214. Up to 583 conditions per place. [2024-06-27 18:02:05,372 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 39 selfloop transitions, 14 changer transitions 10/68 dead transitions. [2024-06-27 18:02:05,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 518 flow [2024-06-27 18:02:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:02:05,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:02:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-27 18:02:05,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-27 18:02:05,374 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 318 flow. Second operand 7 states and 102 transitions. [2024-06-27 18:02:05,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 518 flow [2024-06-27 18:02:05,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 68 transitions, 482 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 18:02:05,378 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 328 flow [2024-06-27 18:02:05,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=328, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2024-06-27 18:02:05,379 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 33 predicate places. [2024-06-27 18:02:05,379 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 328 flow [2024-06-27 18:02:05,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:05,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:05,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:05,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:02:05,380 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)] === [2024-06-27 18:02:05,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:05,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2000607924, now seen corresponding path program 4 times [2024-06-27 18:02:05,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:05,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040087903] [2024-06-27 18:02:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:05,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:05,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:05,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040087903] [2024-06-27 18:02:05,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040087903] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:05,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893015721] [2024-06-27 18:02:05,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:02:05,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:05,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:05,679 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:05,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 18:02:05,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:02:05,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:05,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 18:02:05,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:05,901 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:02:05,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 18:02:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:05,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:06,029 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:02:06,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:02:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:06,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893015721] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:06,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:06,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2024-06-27 18:02:06,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993625900] [2024-06-27 18:02:06,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:06,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 18:02:06,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:06,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 18:02:06,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-27 18:02:06,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:06,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 328 flow. Second operand has 13 states, 13 states have (on average 10.076923076923077) internal successors, (131), 13 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:06,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:06,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:06,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:06,452 INFO L124 PetriNetUnfolderBase]: 442/796 cut-off events. [2024-06-27 18:02:06,452 INFO L125 PetriNetUnfolderBase]: For 853/853 co-relation queries the response was YES. [2024-06-27 18:02:06,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2547 conditions, 796 events. 442/796 cut-off events. For 853/853 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3578 event pairs, 104 based on Foata normal form. 21/816 useless extension candidates. Maximal degree in co-relation 2513. Up to 618 conditions per place. [2024-06-27 18:02:06,459 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 67 selfloop transitions, 23 changer transitions 0/95 dead transitions. [2024-06-27 18:02:06,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 662 flow [2024-06-27 18:02:06,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:02:06,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:02:06,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 159 transitions. [2024-06-27 18:02:06,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380165289256198 [2024-06-27 18:02:06,461 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 328 flow. Second operand 11 states and 159 transitions. [2024-06-27 18:02:06,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 662 flow [2024-06-27 18:02:06,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 95 transitions, 616 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 18:02:06,466 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 410 flow [2024-06-27 18:02:06,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=410, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2024-06-27 18:02:06,468 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 39 predicate places. [2024-06-27 18:02:06,468 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 410 flow [2024-06-27 18:02:06,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.076923076923077) internal successors, (131), 13 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:06,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:06,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:06,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:06,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 18:02:06,680 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)] === [2024-06-27 18:02:06,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:06,681 INFO L85 PathProgramCache]: Analyzing trace with hash 987935454, now seen corresponding path program 3 times [2024-06-27 18:02:06,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:06,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074628253] [2024-06-27 18:02:06,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:06,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:06,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:06,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074628253] [2024-06-27 18:02:06,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074628253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:06,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:06,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:02:06,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857715514] [2024-06-27 18:02:06,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:06,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:02:06,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:06,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:02:07,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:02:07,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:07,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 410 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:07,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:07,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:07,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:07,250 INFO L124 PetriNetUnfolderBase]: 460/826 cut-off events. [2024-06-27 18:02:07,251 INFO L125 PetriNetUnfolderBase]: For 1324/1324 co-relation queries the response was YES. [2024-06-27 18:02:07,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2914 conditions, 826 events. 460/826 cut-off events. For 1324/1324 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3784 event pairs, 114 based on Foata normal form. 12/837 useless extension candidates. Maximal degree in co-relation 2878. Up to 749 conditions per place. [2024-06-27 18:02:07,257 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 57 selfloop transitions, 15 changer transitions 0/77 dead transitions. [2024-06-27 18:02:07,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 618 flow [2024-06-27 18:02:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:02:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:02:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-27 18:02:07,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-27 18:02:07,259 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 410 flow. Second operand 7 states and 102 transitions. [2024-06-27 18:02:07,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 618 flow [2024-06-27 18:02:07,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 77 transitions, 589 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 18:02:07,265 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 426 flow [2024-06-27 18:02:07,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2024-06-27 18:02:07,266 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-06-27 18:02:07,266 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 426 flow [2024-06-27 18:02:07,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:07,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:07,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:07,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:02:07,267 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)] === [2024-06-27 18:02:07,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:07,267 INFO L85 PathProgramCache]: Analyzing trace with hash -324319988, now seen corresponding path program 4 times [2024-06-27 18:02:07,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:07,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166306066] [2024-06-27 18:02:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:07,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:07,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:07,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166306066] [2024-06-27 18:02:07,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166306066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:07,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:07,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:02:07,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535447593] [2024-06-27 18:02:07,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:07,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:02:07,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:07,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:02:07,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:02:07,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:07,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 426 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:07,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:07,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:07,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:07,769 INFO L124 PetriNetUnfolderBase]: 455/820 cut-off events. [2024-06-27 18:02:07,769 INFO L125 PetriNetUnfolderBase]: For 1383/1383 co-relation queries the response was YES. [2024-06-27 18:02:07,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2916 conditions, 820 events. 455/820 cut-off events. For 1383/1383 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3733 event pairs, 141 based on Foata normal form. 5/824 useless extension candidates. Maximal degree in co-relation 2879. Up to 764 conditions per place. [2024-06-27 18:02:07,776 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 50 selfloop transitions, 12 changer transitions 4/71 dead transitions. [2024-06-27 18:02:07,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 71 transitions, 573 flow [2024-06-27 18:02:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:02:07,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:02:07,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-27 18:02:07,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-27 18:02:07,777 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 426 flow. Second operand 7 states and 96 transitions. [2024-06-27 18:02:07,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 71 transitions, 573 flow [2024-06-27 18:02:07,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 547 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 18:02:07,784 INFO L231 Difference]: Finished difference. Result has 73 places, 57 transitions, 405 flow [2024-06-27 18:02:07,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=405, PETRI_PLACES=73, PETRI_TRANSITIONS=57} [2024-06-27 18:02:07,784 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 42 predicate places. [2024-06-27 18:02:07,784 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 57 transitions, 405 flow [2024-06-27 18:02:07,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:07,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:07,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:07,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:02:07,785 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)] === [2024-06-27 18:02:07,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:07,786 INFO L85 PathProgramCache]: Analyzing trace with hash 77547940, now seen corresponding path program 5 times [2024-06-27 18:02:07,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:07,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463639737] [2024-06-27 18:02:07,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:07,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:08,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:08,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463639737] [2024-06-27 18:02:08,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463639737] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:08,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186861940] [2024-06-27 18:02:08,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:02:08,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:08,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:08,079 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:08,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 18:02:08,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:02:08,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:08,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 18:02:08,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:08,291 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:02:08,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-06-27 18:02:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:08,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:08,395 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:02:08,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:02:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:08,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186861940] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:08,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 18:02:08,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 13 [2024-06-27 18:02:08,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896597157] [2024-06-27 18:02:08,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:08,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:02:08,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:08,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:02:08,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:02:08,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-27 18:02:08,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 57 transitions, 405 flow. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:08,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:08,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-27 18:02:08,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:08,624 INFO L124 PetriNetUnfolderBase]: 432/793 cut-off events. [2024-06-27 18:02:08,624 INFO L125 PetriNetUnfolderBase]: For 1397/1406 co-relation queries the response was YES. [2024-06-27 18:02:08,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2763 conditions, 793 events. 432/793 cut-off events. For 1397/1406 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3658 event pairs, 106 based on Foata normal form. 27/818 useless extension candidates. Maximal degree in co-relation 2726. Up to 620 conditions per place. [2024-06-27 18:02:08,631 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 57 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-27 18:02:08,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 604 flow [2024-06-27 18:02:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:02:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:02:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 18:02:08,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-06-27 18:02:08,633 INFO L175 Difference]: Start difference. First operand has 73 places, 57 transitions, 405 flow. Second operand 6 states and 105 transitions. [2024-06-27 18:02:08,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 604 flow [2024-06-27 18:02:08,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 75 transitions, 580 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 18:02:08,639 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 413 flow [2024-06-27 18:02:08,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2024-06-27 18:02:08,640 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-06-27 18:02:08,640 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 413 flow [2024-06-27 18:02:08,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:08,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:08,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:08,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-06-27 18:02:08,856 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,SelfDestructingSolverStorable17 [2024-06-27 18:02:08,857 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:08,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:08,857 INFO L85 PathProgramCache]: Analyzing trace with hash 903366326, now seen corresponding path program 5 times [2024-06-27 18:02:08,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:08,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420286103] [2024-06-27 18:02:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:08,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:09,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:09,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420286103] [2024-06-27 18:02:09,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420286103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:09,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:09,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:02:09,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865944416] [2024-06-27 18:02:09,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:09,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:02:09,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:09,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:02:09,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:02:09,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:09,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 413 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:09,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:09,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:09,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:09,359 INFO L124 PetriNetUnfolderBase]: 450/824 cut-off events. [2024-06-27 18:02:09,360 INFO L125 PetriNetUnfolderBase]: For 1564/1573 co-relation queries the response was YES. [2024-06-27 18:02:09,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2966 conditions, 824 events. 450/824 cut-off events. For 1564/1573 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3840 event pairs, 137 based on Foata normal form. 18/840 useless extension candidates. Maximal degree in co-relation 2928. Up to 753 conditions per place. [2024-06-27 18:02:09,366 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 52 selfloop transitions, 14 changer transitions 0/71 dead transitions. [2024-06-27 18:02:09,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 71 transitions, 601 flow [2024-06-27 18:02:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:02:09,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:02:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-27 18:02:09,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-27 18:02:09,369 INFO L175 Difference]: Start difference. First operand has 72 places, 57 transitions, 413 flow. Second operand 7 states and 96 transitions. [2024-06-27 18:02:09,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 71 transitions, 601 flow [2024-06-27 18:02:09,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 579 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 18:02:09,375 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 436 flow [2024-06-27 18:02:09,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=436, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2024-06-27 18:02:09,375 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-27 18:02:09,375 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 436 flow [2024-06-27 18:02:09,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:09,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:09,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:09,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:02:09,376 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:09,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:09,376 INFO L85 PathProgramCache]: Analyzing trace with hash 941731122, now seen corresponding path program 6 times [2024-06-27 18:02:09,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:09,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469251383] [2024-06-27 18:02:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:09,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:09,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:09,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469251383] [2024-06-27 18:02:09,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469251383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:09,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:09,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:02:09,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282465944] [2024-06-27 18:02:09,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:09,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:02:09,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:09,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:02:09,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:02:09,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:09,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 436 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:09,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:09,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:09,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:09,904 INFO L124 PetriNetUnfolderBase]: 407/729 cut-off events. [2024-06-27 18:02:09,904 INFO L125 PetriNetUnfolderBase]: For 1688/1697 co-relation queries the response was YES. [2024-06-27 18:02:09,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2752 conditions, 729 events. 407/729 cut-off events. For 1688/1697 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3201 event pairs, 116 based on Foata normal form. 10/737 useless extension candidates. Maximal degree in co-relation 2713. Up to 682 conditions per place. [2024-06-27 18:02:09,911 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 46 selfloop transitions, 11 changer transitions 3/65 dead transitions. [2024-06-27 18:02:09,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 65 transitions, 554 flow [2024-06-27 18:02:09,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:02:09,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:02:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-06-27 18:02:09,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-27 18:02:09,913 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 436 flow. Second operand 7 states and 90 transitions. [2024-06-27 18:02:09,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 65 transitions, 554 flow [2024-06-27 18:02:09,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 65 transitions, 528 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 18:02:09,919 INFO L231 Difference]: Finished difference. Result has 76 places, 56 transitions, 408 flow [2024-06-27 18:02:09,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=408, PETRI_PLACES=76, PETRI_TRANSITIONS=56} [2024-06-27 18:02:09,920 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 45 predicate places. [2024-06-27 18:02:09,920 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 56 transitions, 408 flow [2024-06-27 18:02:09,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:09,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:09,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:09,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:02:09,921 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:09,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:09,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1288692338, now seen corresponding path program 6 times [2024-06-27 18:02:09,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:09,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037392087] [2024-06-27 18:02:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:09,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:10,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:10,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037392087] [2024-06-27 18:02:10,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037392087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:10,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:10,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:02:10,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803747674] [2024-06-27 18:02:10,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:10,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:02:10,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:10,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:02:10,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:02:10,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:10,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 56 transitions, 408 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:10,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:10,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:10,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:10,443 INFO L124 PetriNetUnfolderBase]: 363/645 cut-off events. [2024-06-27 18:02:10,443 INFO L125 PetriNetUnfolderBase]: For 1361/1370 co-relation queries the response was YES. [2024-06-27 18:02:10,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2477 conditions, 645 events. 363/645 cut-off events. For 1361/1370 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2690 event pairs, 81 based on Foata normal form. 18/661 useless extension candidates. Maximal degree in co-relation 2438. Up to 516 conditions per place. [2024-06-27 18:02:10,448 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 53 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2024-06-27 18:02:10,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 73 transitions, 615 flow [2024-06-27 18:02:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:02:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:02:10,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-27 18:02:10,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053030303030303 [2024-06-27 18:02:10,451 INFO L175 Difference]: Start difference. First operand has 76 places, 56 transitions, 408 flow. Second operand 8 states and 107 transitions. [2024-06-27 18:02:10,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 73 transitions, 615 flow [2024-06-27 18:02:10,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 73 transitions, 593 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 18:02:10,459 INFO L231 Difference]: Finished difference. Result has 77 places, 56 transitions, 420 flow [2024-06-27 18:02:10,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=420, PETRI_PLACES=77, PETRI_TRANSITIONS=56} [2024-06-27 18:02:10,461 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-06-27 18:02:10,461 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 56 transitions, 420 flow [2024-06-27 18:02:10,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 18:02:10,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:10,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:10,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:02:10,463 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:10,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:10,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1065048229, now seen corresponding path program 1 times [2024-06-27 18:02:10,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:10,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482210078] [2024-06-27 18:02:10,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:10,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:10,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:10,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482210078] [2024-06-27 18:02:10,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482210078] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:10,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560517333] [2024-06-27 18:02:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:10,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:10,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:10,532 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:10,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 18:02:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:10,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 18:02:10,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:10,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:10,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560517333] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:10,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:10,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-06-27 18:02:10,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518292430] [2024-06-27 18:02:10,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:10,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:02:10,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:10,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:02:10,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:02:10,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:10,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 56 transitions, 420 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:10,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:10,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:10,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:10,982 INFO L124 PetriNetUnfolderBase]: 772/1365 cut-off events. [2024-06-27 18:02:10,982 INFO L125 PetriNetUnfolderBase]: For 3009/3018 co-relation queries the response was YES. [2024-06-27 18:02:10,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4852 conditions, 1365 events. 772/1365 cut-off events. For 3009/3018 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6886 event pairs, 97 based on Foata normal form. 14/1377 useless extension candidates. Maximal degree in co-relation 4811. Up to 562 conditions per place. [2024-06-27 18:02:11,002 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 86 selfloop transitions, 20 changer transitions 2/113 dead transitions. [2024-06-27 18:02:11,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 113 transitions, 904 flow [2024-06-27 18:02:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:02:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:02:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 18:02:11,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5800865800865801 [2024-06-27 18:02:11,004 INFO L175 Difference]: Start difference. First operand has 77 places, 56 transitions, 420 flow. Second operand 7 states and 134 transitions. [2024-06-27 18:02:11,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 113 transitions, 904 flow [2024-06-27 18:02:11,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 113 transitions, 843 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 18:02:11,015 INFO L231 Difference]: Finished difference. Result has 78 places, 66 transitions, 500 flow [2024-06-27 18:02:11,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=500, PETRI_PLACES=78, PETRI_TRANSITIONS=66} [2024-06-27 18:02:11,016 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 47 predicate places. [2024-06-27 18:02:11,016 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 66 transitions, 500 flow [2024-06-27 18:02:11,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:11,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:11,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:11,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:11,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:11,234 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:11,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:11,234 INFO L85 PathProgramCache]: Analyzing trace with hash 535327077, now seen corresponding path program 2 times [2024-06-27 18:02:11,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:11,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962364034] [2024-06-27 18:02:11,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:11,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:11,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:11,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962364034] [2024-06-27 18:02:11,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962364034] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:11,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545223317] [2024-06-27 18:02:11,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:02:11,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:11,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:11,333 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:11,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 18:02:11,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:02:11,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:11,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 18:02:11,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:11,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:11,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545223317] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:11,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:11,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-06-27 18:02:11,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251359162] [2024-06-27 18:02:11,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:11,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:02:11,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:11,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:02:11,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:02:11,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:11,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 66 transitions, 500 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:11,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:11,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:11,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:11,888 INFO L124 PetriNetUnfolderBase]: 1204/2117 cut-off events. [2024-06-27 18:02:11,889 INFO L125 PetriNetUnfolderBase]: For 4402/4411 co-relation queries the response was YES. [2024-06-27 18:02:11,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7552 conditions, 2117 events. 1204/2117 cut-off events. For 4402/4411 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11783 event pairs, 315 based on Foata normal form. 14/2128 useless extension candidates. Maximal degree in co-relation 7511. Up to 1360 conditions per place. [2024-06-27 18:02:11,901 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 96 selfloop transitions, 17 changer transitions 2/120 dead transitions. [2024-06-27 18:02:11,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 120 transitions, 1009 flow [2024-06-27 18:02:11,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:02:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:02:11,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 18:02:11,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627705627705628 [2024-06-27 18:02:11,903 INFO L175 Difference]: Start difference. First operand has 78 places, 66 transitions, 500 flow. Second operand 7 states and 130 transitions. [2024-06-27 18:02:11,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 120 transitions, 1009 flow [2024-06-27 18:02:11,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 120 transitions, 994 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 18:02:11,918 INFO L231 Difference]: Finished difference. Result has 86 places, 76 transitions, 627 flow [2024-06-27 18:02:11,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=627, PETRI_PLACES=86, PETRI_TRANSITIONS=76} [2024-06-27 18:02:11,919 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2024-06-27 18:02:11,919 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 76 transitions, 627 flow [2024-06-27 18:02:11,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:11,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:11,919 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:11,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:12,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:12,133 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:12,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:12,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2114678481, now seen corresponding path program 3 times [2024-06-27 18:02:12,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:12,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948412532] [2024-06-27 18:02:12,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:12,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:12,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:12,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948412532] [2024-06-27 18:02:12,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948412532] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:12,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501192010] [2024-06-27 18:02:12,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:02:12,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:12,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:12,218 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:12,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 18:02:12,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 18:02:12,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:12,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:02:12,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:12,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:12,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501192010] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:12,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:12,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2024-06-27 18:02:12,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352608987] [2024-06-27 18:02:12,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:12,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 18:02:12,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:12,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 18:02:12,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-06-27 18:02:12,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-27 18:02:12,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 76 transitions, 627 flow. Second operand has 15 states, 15 states have (on average 12.133333333333333) internal successors, (182), 15 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:12,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:12,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-27 18:02:12,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:13,288 INFO L124 PetriNetUnfolderBase]: 2393/4343 cut-off events. [2024-06-27 18:02:13,289 INFO L125 PetriNetUnfolderBase]: For 11180/11189 co-relation queries the response was YES. [2024-06-27 18:02:13,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16499 conditions, 4343 events. 2393/4343 cut-off events. For 11180/11189 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 28807 event pairs, 1439 based on Foata normal form. 183/4520 useless extension candidates. Maximal degree in co-relation 15568. Up to 2095 conditions per place. [2024-06-27 18:02:13,322 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 188 selfloop transitions, 39 changer transitions 0/232 dead transitions. [2024-06-27 18:02:13,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 232 transitions, 2368 flow [2024-06-27 18:02:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 18:02:13,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 18:02:13,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 259 transitions. [2024-06-27 18:02:13,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49053030303030304 [2024-06-27 18:02:13,324 INFO L175 Difference]: Start difference. First operand has 86 places, 76 transitions, 627 flow. Second operand 16 states and 259 transitions. [2024-06-27 18:02:13,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 232 transitions, 2368 flow [2024-06-27 18:02:13,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 232 transitions, 2261 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-27 18:02:13,380 INFO L231 Difference]: Finished difference. Result has 106 places, 111 transitions, 1163 flow [2024-06-27 18:02:13,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1163, PETRI_PLACES=106, PETRI_TRANSITIONS=111} [2024-06-27 18:02:13,380 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2024-06-27 18:02:13,381 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 111 transitions, 1163 flow [2024-06-27 18:02:13,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.133333333333333) internal successors, (182), 15 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:13,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:13,381 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:13,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:13,602 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,SelfDestructingSolverStorable23 [2024-06-27 18:02:13,603 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:13,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:13,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1331895571, now seen corresponding path program 4 times [2024-06-27 18:02:13,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:13,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325767007] [2024-06-27 18:02:13,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:13,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:13,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:13,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325767007] [2024-06-27 18:02:13,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325767007] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:13,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992876318] [2024-06-27 18:02:13,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:02:13,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:13,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:13,681 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:13,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 18:02:13,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:02:13,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:13,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 18:02:13,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:13,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 18:02:13,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992876318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:13,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 18:02:13,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 12 [2024-06-27 18:02:13,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412254019] [2024-06-27 18:02:13,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:13,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:02:13,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:13,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:02:13,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:02:13,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-27 18:02:13,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 111 transitions, 1163 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:13,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:13,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-27 18:02:13,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:14,784 INFO L124 PetriNetUnfolderBase]: 2898/5381 cut-off events. [2024-06-27 18:02:14,784 INFO L125 PetriNetUnfolderBase]: For 14801/14801 co-relation queries the response was YES. [2024-06-27 18:02:14,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19923 conditions, 5381 events. 2898/5381 cut-off events. For 14801/14801 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 39251 event pairs, 310 based on Foata normal form. 8/5383 useless extension candidates. Maximal degree in co-relation 18792. Up to 1604 conditions per place. [2024-06-27 18:02:14,837 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 111 selfloop transitions, 69 changer transitions 6/191 dead transitions. [2024-06-27 18:02:14,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 191 transitions, 1988 flow [2024-06-27 18:02:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:02:14,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:02:14,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 18:02:14,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121212121212121 [2024-06-27 18:02:14,839 INFO L175 Difference]: Start difference. First operand has 106 places, 111 transitions, 1163 flow. Second operand 10 states and 169 transitions. [2024-06-27 18:02:14,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 191 transitions, 1988 flow [2024-06-27 18:02:14,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 191 transitions, 1963 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 18:02:14,893 INFO L231 Difference]: Finished difference. Result has 116 places, 124 transitions, 1429 flow [2024-06-27 18:02:14,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1429, PETRI_PLACES=116, PETRI_TRANSITIONS=124} [2024-06-27 18:02:14,894 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 85 predicate places. [2024-06-27 18:02:14,894 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 124 transitions, 1429 flow [2024-06-27 18:02:14,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:14,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:14,895 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:14,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:15,111 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,SelfDestructingSolverStorable24 [2024-06-27 18:02:15,111 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:15,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:15,112 INFO L85 PathProgramCache]: Analyzing trace with hash -173817771, now seen corresponding path program 5 times [2024-06-27 18:02:15,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:15,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273531853] [2024-06-27 18:02:15,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:15,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:02:15,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:15,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273531853] [2024-06-27 18:02:15,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273531853] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:15,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098207919] [2024-06-27 18:02:15,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:02:15,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:15,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:15,182 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:15,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 18:02:15,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 18:02:15,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:15,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:02:15,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:02:15,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:02:15,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098207919] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:15,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:15,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-06-27 18:02:15,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708491890] [2024-06-27 18:02:15,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:15,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:02:15,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:15,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:02:15,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:02:15,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-27 18:02:15,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 124 transitions, 1429 flow. Second operand has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:15,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:15,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-27 18:02:15,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:15,926 INFO L124 PetriNetUnfolderBase]: 2070/3858 cut-off events. [2024-06-27 18:02:15,926 INFO L125 PetriNetUnfolderBase]: For 15048/15060 co-relation queries the response was YES. [2024-06-27 18:02:15,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16393 conditions, 3858 events. 2070/3858 cut-off events. For 15048/15060 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 25726 event pairs, 1470 based on Foata normal form. 55/3908 useless extension candidates. Maximal degree in co-relation 16183. Up to 3270 conditions per place. [2024-06-27 18:02:15,962 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 93 selfloop transitions, 3 changer transitions 47/148 dead transitions. [2024-06-27 18:02:15,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 148 transitions, 1850 flow [2024-06-27 18:02:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:02:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:02:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 18:02:15,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48917748917748916 [2024-06-27 18:02:15,963 INFO L175 Difference]: Start difference. First operand has 116 places, 124 transitions, 1429 flow. Second operand 7 states and 113 transitions. [2024-06-27 18:02:15,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 148 transitions, 1850 flow [2024-06-27 18:02:16,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 148 transitions, 1666 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 18:02:16,025 INFO L231 Difference]: Finished difference. Result has 115 places, 101 transitions, 974 flow [2024-06-27 18:02:16,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=974, PETRI_PLACES=115, PETRI_TRANSITIONS=101} [2024-06-27 18:02:16,026 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 84 predicate places. [2024-06-27 18:02:16,026 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 101 transitions, 974 flow [2024-06-27 18:02:16,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:16,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:16,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:16,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:16,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-06-27 18:02:16,240 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:16,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:16,241 INFO L85 PathProgramCache]: Analyzing trace with hash -656188156, now seen corresponding path program 6 times [2024-06-27 18:02:16,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:16,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744971772] [2024-06-27 18:02:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:16,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:16,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:16,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744971772] [2024-06-27 18:02:16,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744971772] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:16,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235865936] [2024-06-27 18:02:16,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:02:16,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:16,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:16,345 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:16,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 18:02:16,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 18:02:16,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:16,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:02:16,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:16,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:16,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235865936] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:16,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:16,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 18:02:16,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648590034] [2024-06-27 18:02:16,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:16,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 18:02:16,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:16,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 18:02:16,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-06-27 18:02:16,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-27 18:02:16,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 101 transitions, 974 flow. Second operand has 13 states, 13 states have (on average 12.0) internal successors, (156), 13 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:16,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:16,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-27 18:02:16,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:17,019 INFO L124 PetriNetUnfolderBase]: 1466/2680 cut-off events. [2024-06-27 18:02:17,020 INFO L125 PetriNetUnfolderBase]: For 9162/9167 co-relation queries the response was YES. [2024-06-27 18:02:17,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10843 conditions, 2680 events. 1466/2680 cut-off events. For 9162/9167 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16241 event pairs, 1064 based on Foata normal form. 27/2704 useless extension candidates. Maximal degree in co-relation 10799. Up to 2377 conditions per place. [2024-06-27 18:02:17,044 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 82 selfloop transitions, 4 changer transitions 36/127 dead transitions. [2024-06-27 18:02:17,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 127 transitions, 1393 flow [2024-06-27 18:02:17,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:02:17,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:02:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 18:02:17,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-27 18:02:17,045 INFO L175 Difference]: Start difference. First operand has 115 places, 101 transitions, 974 flow. Second operand 7 states and 111 transitions. [2024-06-27 18:02:17,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 127 transitions, 1393 flow [2024-06-27 18:02:17,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 127 transitions, 1335 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 18:02:17,074 INFO L231 Difference]: Finished difference. Result has 105 places, 91 transitions, 814 flow [2024-06-27 18:02:17,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=814, PETRI_PLACES=105, PETRI_TRANSITIONS=91} [2024-06-27 18:02:17,074 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2024-06-27 18:02:17,075 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 91 transitions, 814 flow [2024-06-27 18:02:17,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.0) internal successors, (156), 13 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:17,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:17,075 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:17,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:17,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-06-27 18:02:17,291 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:17,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:17,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1481269675, now seen corresponding path program 7 times [2024-06-27 18:02:17,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:17,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767410145] [2024-06-27 18:02:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:17,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:02:17,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:17,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767410145] [2024-06-27 18:02:17,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767410145] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:17,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261098316] [2024-06-27 18:02:17,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:02:17,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:17,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:17,473 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:17,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 18:02:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:17,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 18:02:17,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:02:17,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:02:18,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261098316] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:18,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:18,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-06-27 18:02:18,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422298240] [2024-06-27 18:02:18,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:18,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:02:18,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:18,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:02:18,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:02:18,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-27 18:02:18,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 91 transitions, 814 flow. Second operand has 21 states, 21 states have (on average 11.380952380952381) internal successors, (239), 21 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:18,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:18,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-27 18:02:18,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:18,604 INFO L124 PetriNetUnfolderBase]: 1430/2588 cut-off events. [2024-06-27 18:02:18,604 INFO L125 PetriNetUnfolderBase]: For 8281/8295 co-relation queries the response was YES. [2024-06-27 18:02:18,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10282 conditions, 2588 events. 1430/2588 cut-off events. For 8281/8295 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15406 event pairs, 339 based on Foata normal form. 65/2650 useless extension candidates. Maximal degree in co-relation 10230. Up to 798 conditions per place. [2024-06-27 18:02:18,632 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 88 selfloop transitions, 43 changer transitions 0/136 dead transitions. [2024-06-27 18:02:18,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 136 transitions, 1387 flow [2024-06-27 18:02:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:02:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:02:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 159 transitions. [2024-06-27 18:02:18,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380165289256198 [2024-06-27 18:02:18,634 INFO L175 Difference]: Start difference. First operand has 105 places, 91 transitions, 814 flow. Second operand 11 states and 159 transitions. [2024-06-27 18:02:18,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 136 transitions, 1387 flow [2024-06-27 18:02:18,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 136 transitions, 1315 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 18:02:18,667 INFO L231 Difference]: Finished difference. Result has 106 places, 98 transitions, 968 flow [2024-06-27 18:02:18,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=968, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2024-06-27 18:02:18,667 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2024-06-27 18:02:18,668 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 968 flow [2024-06-27 18:02:18,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.380952380952381) internal successors, (239), 21 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:18,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:18,668 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:18,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:18,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-06-27 18:02:18,886 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:18,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:18,886 INFO L85 PathProgramCache]: Analyzing trace with hash -777585761, now seen corresponding path program 8 times [2024-06-27 18:02:18,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:18,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968837569] [2024-06-27 18:02:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:18,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:02:19,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:19,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968837569] [2024-06-27 18:02:19,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968837569] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:19,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783533509] [2024-06-27 18:02:19,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:02:19,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:19,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:19,066 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:19,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 18:02:19,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:02:19,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:19,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 18:02:19,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:02:19,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:02:19,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783533509] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:19,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:19,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-06-27 18:02:19,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104661688] [2024-06-27 18:02:19,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:19,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 18:02:19,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:19,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 18:02:19,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2024-06-27 18:02:19,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-27 18:02:19,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 968 flow. Second operand has 23 states, 23 states have (on average 11.304347826086957) internal successors, (260), 23 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:19,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:19,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-27 18:02:19,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:19,989 INFO L124 PetriNetUnfolderBase]: 1456/2618 cut-off events. [2024-06-27 18:02:19,990 INFO L125 PetriNetUnfolderBase]: For 9756/9762 co-relation queries the response was YES. [2024-06-27 18:02:19,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10705 conditions, 2618 events. 1456/2618 cut-off events. For 9756/9762 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15617 event pairs, 360 based on Foata normal form. 55/2671 useless extension candidates. Maximal degree in co-relation 10652. Up to 1076 conditions per place. [2024-06-27 18:02:20,009 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 115 selfloop transitions, 28 changer transitions 0/148 dead transitions. [2024-06-27 18:02:20,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 148 transitions, 1604 flow [2024-06-27 18:02:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:02:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:02:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-27 18:02:20,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46005509641873277 [2024-06-27 18:02:20,012 INFO L175 Difference]: Start difference. First operand has 106 places, 98 transitions, 968 flow. Second operand 11 states and 167 transitions. [2024-06-27 18:02:20,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 148 transitions, 1604 flow [2024-06-27 18:02:20,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 148 transitions, 1556 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 18:02:20,043 INFO L231 Difference]: Finished difference. Result has 111 places, 97 transitions, 970 flow [2024-06-27 18:02:20,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=970, PETRI_PLACES=111, PETRI_TRANSITIONS=97} [2024-06-27 18:02:20,043 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-27 18:02:20,044 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 97 transitions, 970 flow [2024-06-27 18:02:20,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.304347826086957) internal successors, (260), 23 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:20,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:20,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:20,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:20,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-06-27 18:02:20,259 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:20,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:20,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1596653374, now seen corresponding path program 1 times [2024-06-27 18:02:20,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:20,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428197808] [2024-06-27 18:02:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:20,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:20,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:20,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428197808] [2024-06-27 18:02:20,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428197808] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:20,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291340473] [2024-06-27 18:02:20,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:20,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:20,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:20,741 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:20,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 18:02:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:20,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 18:02:20,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:20,958 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 18:02:20,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2024-06-27 18:02:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:20,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:21,083 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 18:02:21,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 18:02:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:21,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291340473] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:21,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:21,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 20 [2024-06-27 18:02:21,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181522914] [2024-06-27 18:02:21,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:21,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:02:21,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:21,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:02:21,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:02:21,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:21,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 97 transitions, 970 flow. Second operand has 21 states, 21 states have (on average 9.80952380952381) internal successors, (206), 21 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:21,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:21,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:21,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:22,149 INFO L124 PetriNetUnfolderBase]: 1821/3282 cut-off events. [2024-06-27 18:02:22,149 INFO L125 PetriNetUnfolderBase]: For 13844/13850 co-relation queries the response was YES. [2024-06-27 18:02:22,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14042 conditions, 3282 events. 1821/3282 cut-off events. For 13844/13850 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20059 event pairs, 402 based on Foata normal form. 42/3322 useless extension candidates. Maximal degree in co-relation 13987. Up to 1553 conditions per place. [2024-06-27 18:02:22,172 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 158 selfloop transitions, 59 changer transitions 1/223 dead transitions. [2024-06-27 18:02:22,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 223 transitions, 2335 flow [2024-06-27 18:02:22,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 18:02:22,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 18:02:22,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 272 transitions. [2024-06-27 18:02:22,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45791245791245794 [2024-06-27 18:02:22,174 INFO L175 Difference]: Start difference. First operand has 111 places, 97 transitions, 970 flow. Second operand 18 states and 272 transitions. [2024-06-27 18:02:22,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 223 transitions, 2335 flow [2024-06-27 18:02:22,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 223 transitions, 2313 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 18:02:22,213 INFO L231 Difference]: Finished difference. Result has 128 places, 118 transitions, 1409 flow [2024-06-27 18:02:22,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1409, PETRI_PLACES=128, PETRI_TRANSITIONS=118} [2024-06-27 18:02:22,214 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 97 predicate places. [2024-06-27 18:02:22,214 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 118 transitions, 1409 flow [2024-06-27 18:02:22,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.80952380952381) internal successors, (206), 21 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:22,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:22,214 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:22,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:22,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:22,428 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:22,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:22,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1641918090, now seen corresponding path program 1 times [2024-06-27 18:02:22,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:22,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129644963] [2024-06-27 18:02:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:22,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:22,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:22,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129644963] [2024-06-27 18:02:22,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129644963] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:22,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053886388] [2024-06-27 18:02:22,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:22,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:22,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:22,873 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:22,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 18:02:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:22,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 18:02:22,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:23,114 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 18:02:23,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2024-06-27 18:02:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:23,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:23,246 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 18:02:23,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 18:02:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:23,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053886388] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:23,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:23,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 20 [2024-06-27 18:02:23,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103067262] [2024-06-27 18:02:23,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:23,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:02:23,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:23,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:02:23,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:02:23,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:23,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 118 transitions, 1409 flow. Second operand has 21 states, 21 states have (on average 10.0) internal successors, (210), 21 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:23,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:23,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:23,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:24,316 INFO L124 PetriNetUnfolderBase]: 1861/3375 cut-off events. [2024-06-27 18:02:24,316 INFO L125 PetriNetUnfolderBase]: For 20295/20301 co-relation queries the response was YES. [2024-06-27 18:02:24,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16029 conditions, 3375 events. 1861/3375 cut-off events. For 20295/20301 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21034 event pairs, 661 based on Foata normal form. 14/3387 useless extension candidates. Maximal degree in co-relation 15966. Up to 2392 conditions per place. [2024-06-27 18:02:24,335 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 128 selfloop transitions, 37 changer transitions 35/205 dead transitions. [2024-06-27 18:02:24,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 205 transitions, 2356 flow [2024-06-27 18:02:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 18:02:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 18:02:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 243 transitions. [2024-06-27 18:02:24,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43315508021390375 [2024-06-27 18:02:24,337 INFO L175 Difference]: Start difference. First operand has 128 places, 118 transitions, 1409 flow. Second operand 17 states and 243 transitions. [2024-06-27 18:02:24,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 205 transitions, 2356 flow [2024-06-27 18:02:24,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 205 transitions, 2238 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 18:02:24,385 INFO L231 Difference]: Finished difference. Result has 139 places, 114 transitions, 1332 flow [2024-06-27 18:02:24,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1332, PETRI_PLACES=139, PETRI_TRANSITIONS=114} [2024-06-27 18:02:24,386 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 108 predicate places. [2024-06-27 18:02:24,386 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 114 transitions, 1332 flow [2024-06-27 18:02:24,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.0) internal successors, (210), 21 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:24,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:24,386 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:24,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:24,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:24,588 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:24,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:24,589 INFO L85 PathProgramCache]: Analyzing trace with hash -80653448, now seen corresponding path program 2 times [2024-06-27 18:02:24,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:24,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276759261] [2024-06-27 18:02:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:24,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:24,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:24,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276759261] [2024-06-27 18:02:24,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276759261] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:24,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770493104] [2024-06-27 18:02:24,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:02:24,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:24,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:25,017 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:25,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 18:02:25,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:02:25,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:25,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 18:02:25,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:25,348 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:02:25,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 18:02:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:02:25,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:25,460 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 18:02:25,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 18:02:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:25,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770493104] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:25,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:25,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 21 [2024-06-27 18:02:25,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970148564] [2024-06-27 18:02:25,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:25,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 18:02:25,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:25,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 18:02:25,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-06-27 18:02:25,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:25,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 114 transitions, 1332 flow. Second operand has 22 states, 22 states have (on average 9.636363636363637) internal successors, (212), 22 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:25,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:25,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:25,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:26,732 INFO L124 PetriNetUnfolderBase]: 2177/3933 cut-off events. [2024-06-27 18:02:26,733 INFO L125 PetriNetUnfolderBase]: For 28747/28747 co-relation queries the response was YES. [2024-06-27 18:02:26,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19407 conditions, 3933 events. 2177/3933 cut-off events. For 28747/28747 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 25472 event pairs, 627 based on Foata normal form. 24/3956 useless extension candidates. Maximal degree in co-relation 19340. Up to 2404 conditions per place. [2024-06-27 18:02:26,754 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 179 selfloop transitions, 77 changer transitions 2/263 dead transitions. [2024-06-27 18:02:26,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 263 transitions, 3151 flow [2024-06-27 18:02:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 18:02:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 18:02:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 334 transitions. [2024-06-27 18:02:26,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4400527009222661 [2024-06-27 18:02:26,756 INFO L175 Difference]: Start difference. First operand has 139 places, 114 transitions, 1332 flow. Second operand 23 states and 334 transitions. [2024-06-27 18:02:26,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 263 transitions, 3151 flow [2024-06-27 18:02:26,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 263 transitions, 2935 flow, removed 44 selfloop flow, removed 16 redundant places. [2024-06-27 18:02:26,813 INFO L231 Difference]: Finished difference. Result has 149 places, 152 transitions, 1974 flow [2024-06-27 18:02:26,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1974, PETRI_PLACES=149, PETRI_TRANSITIONS=152} [2024-06-27 18:02:26,814 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 118 predicate places. [2024-06-27 18:02:26,814 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 152 transitions, 1974 flow [2024-06-27 18:02:26,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.636363636363637) internal successors, (212), 22 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:26,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:26,814 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:26,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:27,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:27,015 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:27,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:27,016 INFO L85 PathProgramCache]: Analyzing trace with hash 307428064, now seen corresponding path program 2 times [2024-06-27 18:02:27,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:27,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523309031] [2024-06-27 18:02:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:27,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:27,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:27,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523309031] [2024-06-27 18:02:27,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523309031] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:27,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277717629] [2024-06-27 18:02:27,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:02:27,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:27,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:27,465 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:27,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 18:02:27,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:02:27,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:27,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 18:02:27,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:27,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:02:27,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 18:02:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:02:27,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:27,935 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 18:02:27,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 18:02:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:27,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277717629] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:27,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:27,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 21 [2024-06-27 18:02:27,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543064783] [2024-06-27 18:02:27,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:27,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 18:02:28,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:28,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 18:02:28,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-06-27 18:02:28,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:28,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 152 transitions, 1974 flow. Second operand has 22 states, 22 states have (on average 9.636363636363637) internal successors, (212), 22 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:28,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:28,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:28,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:29,475 INFO L124 PetriNetUnfolderBase]: 2501/4535 cut-off events. [2024-06-27 18:02:29,476 INFO L125 PetriNetUnfolderBase]: For 39523/39523 co-relation queries the response was YES. [2024-06-27 18:02:29,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23439 conditions, 4535 events. 2501/4535 cut-off events. For 39523/39523 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 30057 event pairs, 645 based on Foata normal form. 16/4550 useless extension candidates. Maximal degree in co-relation 23368. Up to 2634 conditions per place. [2024-06-27 18:02:29,505 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 214 selfloop transitions, 116 changer transitions 14/349 dead transitions. [2024-06-27 18:02:29,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 349 transitions, 4304 flow [2024-06-27 18:02:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-06-27 18:02:29,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-06-27 18:02:29,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 486 transitions. [2024-06-27 18:02:29,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 18:02:29,508 INFO L175 Difference]: Start difference. First operand has 149 places, 152 transitions, 1974 flow. Second operand 36 states and 486 transitions. [2024-06-27 18:02:29,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 349 transitions, 4304 flow [2024-06-27 18:02:29,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 349 transitions, 3992 flow, removed 108 selfloop flow, removed 13 redundant places. [2024-06-27 18:02:29,645 INFO L231 Difference]: Finished difference. Result has 179 places, 193 transitions, 2748 flow [2024-06-27 18:02:29,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1734, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2748, PETRI_PLACES=179, PETRI_TRANSITIONS=193} [2024-06-27 18:02:29,645 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 148 predicate places. [2024-06-27 18:02:29,646 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 193 transitions, 2748 flow [2024-06-27 18:02:29,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.636363636363637) internal successors, (212), 22 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:29,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:29,646 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:29,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:29,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:29,847 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:29,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:29,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1791568464, now seen corresponding path program 3 times [2024-06-27 18:02:29,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:29,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827875533] [2024-06-27 18:02:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:29,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:30,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:30,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827875533] [2024-06-27 18:02:30,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827875533] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:30,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942807944] [2024-06-27 18:02:30,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:02:30,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:30,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:30,274 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:30,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 18:02:30,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 18:02:30,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:30,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjunts are in the unsatisfiable core [2024-06-27 18:02:30,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:30,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 18:02:30,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 18:02:30,492 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 18:02:30,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 18:02:30,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 18:02:30,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 18:02:30,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:02:30,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 18:02:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:02:30,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:31,290 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:02:31,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 66 [2024-06-27 18:02:31,340 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 18:02:31,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 184 [2024-06-27 18:02:31,358 INFO L173 IndexEqualityManager]: detected equality via solver [2024-06-27 18:02:31,360 INFO L173 IndexEqualityManager]: detected equality via solver [2024-06-27 18:02:31,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:02:31,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 140 treesize of output 132 [2024-06-27 18:02:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:31,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942807944] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:31,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:31,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 32 [2024-06-27 18:02:31,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531867969] [2024-06-27 18:02:31,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:31,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 18:02:31,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:31,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 18:02:31,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=877, Unknown=7, NotChecked=0, Total=1056 [2024-06-27 18:02:31,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 18:02:31,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 193 transitions, 2748 flow. Second operand has 33 states, 33 states have (on average 7.96969696969697) internal successors, (263), 33 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:31,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:31,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 18:02:31,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:34,509 INFO L124 PetriNetUnfolderBase]: 4711/8087 cut-off events. [2024-06-27 18:02:34,509 INFO L125 PetriNetUnfolderBase]: For 78809/78809 co-relation queries the response was YES. [2024-06-27 18:02:34,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42184 conditions, 8087 events. 4711/8087 cut-off events. For 78809/78809 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 55283 event pairs, 1372 based on Foata normal form. 21/8107 useless extension candidates. Maximal degree in co-relation 42108. Up to 5555 conditions per place. [2024-06-27 18:02:34,564 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 267 selfloop transitions, 93 changer transitions 20/384 dead transitions. [2024-06-27 18:02:34,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 384 transitions, 4999 flow [2024-06-27 18:02:34,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 18:02:34,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 18:02:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 397 transitions. [2024-06-27 18:02:34,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148380355276907 [2024-06-27 18:02:34,566 INFO L175 Difference]: Start difference. First operand has 179 places, 193 transitions, 2748 flow. Second operand 29 states and 397 transitions. [2024-06-27 18:02:34,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 384 transitions, 4999 flow [2024-06-27 18:02:35,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 384 transitions, 4649 flow, removed 86 selfloop flow, removed 22 redundant places. [2024-06-27 18:02:35,057 INFO L231 Difference]: Finished difference. Result has 189 places, 224 transitions, 3267 flow [2024-06-27 18:02:35,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3267, PETRI_PLACES=189, PETRI_TRANSITIONS=224} [2024-06-27 18:02:35,058 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 158 predicate places. [2024-06-27 18:02:35,058 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 224 transitions, 3267 flow [2024-06-27 18:02:35,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.96969696969697) internal successors, (263), 33 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:35,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:35,059 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:35,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:35,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:35,273 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:35,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:35,273 INFO L85 PathProgramCache]: Analyzing trace with hash 295168298, now seen corresponding path program 3 times [2024-06-27 18:02:35,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:35,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267820146] [2024-06-27 18:02:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:35,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:35,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:35,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267820146] [2024-06-27 18:02:35,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267820146] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:35,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499078951] [2024-06-27 18:02:35,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:02:35,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:35,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:35,697 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:35,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-27 18:02:35,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 18:02:35,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:35,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 18:02:35,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:36,016 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:02:36,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2024-06-27 18:02:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:36,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:36,137 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 18:02:36,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 18:02:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:36,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499078951] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:36,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:36,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 21 [2024-06-27 18:02:36,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499306022] [2024-06-27 18:02:36,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:36,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 18:02:36,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:36,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 18:02:36,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-06-27 18:02:36,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:36,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 224 transitions, 3267 flow. Second operand has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:36,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:36,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:36,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:38,183 INFO L124 PetriNetUnfolderBase]: 3072/5612 cut-off events. [2024-06-27 18:02:38,184 INFO L125 PetriNetUnfolderBase]: For 64596/64596 co-relation queries the response was YES. [2024-06-27 18:02:38,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29899 conditions, 5612 events. 3072/5612 cut-off events. For 64596/64596 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 39461 event pairs, 750 based on Foata normal form. 112/5723 useless extension candidates. Maximal degree in co-relation 29817. Up to 2871 conditions per place. [2024-06-27 18:02:38,223 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 246 selfloop transitions, 160 changer transitions 9/420 dead transitions. [2024-06-27 18:02:38,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 420 transitions, 5580 flow [2024-06-27 18:02:38,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-06-27 18:02:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-06-27 18:02:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 572 transitions. [2024-06-27 18:02:38,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-27 18:02:38,225 INFO L175 Difference]: Start difference. First operand has 189 places, 224 transitions, 3267 flow. Second operand 43 states and 572 transitions. [2024-06-27 18:02:38,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 420 transitions, 5580 flow [2024-06-27 18:02:38,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 420 transitions, 5459 flow, removed 17 selfloop flow, removed 14 redundant places. [2024-06-27 18:02:38,416 INFO L231 Difference]: Finished difference. Result has 220 places, 246 transitions, 3868 flow [2024-06-27 18:02:38,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3157, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=3868, PETRI_PLACES=220, PETRI_TRANSITIONS=246} [2024-06-27 18:02:38,417 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 189 predicate places. [2024-06-27 18:02:38,417 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 246 transitions, 3868 flow [2024-06-27 18:02:38,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:38,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:38,418 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:38,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-06-27 18:02:38,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:38,623 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:38,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:38,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1705280060, now seen corresponding path program 4 times [2024-06-27 18:02:38,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:38,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166688291] [2024-06-27 18:02:38,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:38,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:39,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:39,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166688291] [2024-06-27 18:02:39,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166688291] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:39,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049115099] [2024-06-27 18:02:39,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:02:39,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:39,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:39,190 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:39,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-06-27 18:02:39,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:02:39,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:39,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 18:02:39,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:39,550 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 18:02:39,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-06-27 18:02:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:39,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:39,665 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 18:02:39,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 18:02:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:39,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049115099] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:39,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:39,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 22 [2024-06-27 18:02:39,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406195327] [2024-06-27 18:02:39,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:39,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 18:02:39,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:39,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 18:02:39,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-06-27 18:02:39,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:39,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 246 transitions, 3868 flow. Second operand has 23 states, 23 states have (on average 9.565217391304348) internal successors, (220), 23 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:39,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:39,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:39,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:41,264 INFO L124 PetriNetUnfolderBase]: 2987/5445 cut-off events. [2024-06-27 18:02:41,264 INFO L125 PetriNetUnfolderBase]: For 86457/86457 co-relation queries the response was YES. [2024-06-27 18:02:41,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31641 conditions, 5445 events. 2987/5445 cut-off events. For 86457/86457 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 37902 event pairs, 805 based on Foata normal form. 30/5474 useless extension candidates. Maximal degree in co-relation 31552. Up to 3310 conditions per place. [2024-06-27 18:02:41,371 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 204 selfloop transitions, 109 changer transitions 30/348 dead transitions. [2024-06-27 18:02:41,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 348 transitions, 5272 flow [2024-06-27 18:02:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 18:02:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 18:02:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 339 transitions. [2024-06-27 18:02:41,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2024-06-27 18:02:41,377 INFO L175 Difference]: Start difference. First operand has 220 places, 246 transitions, 3868 flow. Second operand 24 states and 339 transitions. [2024-06-27 18:02:41,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 348 transitions, 5272 flow [2024-06-27 18:02:41,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 348 transitions, 4909 flow, removed 28 selfloop flow, removed 33 redundant places. [2024-06-27 18:02:41,611 INFO L231 Difference]: Finished difference. Result has 208 places, 236 transitions, 3580 flow [2024-06-27 18:02:41,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3465, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3580, PETRI_PLACES=208, PETRI_TRANSITIONS=236} [2024-06-27 18:02:41,612 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 177 predicate places. [2024-06-27 18:02:41,612 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 236 transitions, 3580 flow [2024-06-27 18:02:41,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.565217391304348) internal successors, (220), 23 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:41,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:41,613 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:41,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-06-27 18:02:41,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-06-27 18:02:41,823 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:41,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:41,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1429648570, now seen corresponding path program 4 times [2024-06-27 18:02:41,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:41,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268985872] [2024-06-27 18:02:41,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:41,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:42,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:42,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268985872] [2024-06-27 18:02:42,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268985872] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:42,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201850439] [2024-06-27 18:02:42,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:02:42,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:42,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:42,303 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:42,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-06-27 18:02:42,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:02:42,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:42,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 18:02:42,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:42,594 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 18:02:42,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2024-06-27 18:02:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:42,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:42,720 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 18:02:42,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 18:02:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:42,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201850439] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:42,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:42,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2024-06-27 18:02:42,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054251579] [2024-06-27 18:02:42,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:42,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 18:02:42,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:42,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 18:02:42,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-06-27 18:02:42,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:42,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 236 transitions, 3580 flow. Second operand has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:42,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:42,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:42,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:44,771 INFO L124 PetriNetUnfolderBase]: 3044/5475 cut-off events. [2024-06-27 18:02:44,772 INFO L125 PetriNetUnfolderBase]: For 98001/98001 co-relation queries the response was YES. [2024-06-27 18:02:44,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31532 conditions, 5475 events. 3044/5475 cut-off events. For 98001/98001 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 37500 event pairs, 452 based on Foata normal form. 219/5693 useless extension candidates. Maximal degree in co-relation 31464. Up to 2300 conditions per place. [2024-06-27 18:02:44,813 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 255 selfloop transitions, 206 changer transitions 9/475 dead transitions. [2024-06-27 18:02:44,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 475 transitions, 6632 flow [2024-06-27 18:02:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-06-27 18:02:44,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-06-27 18:02:44,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 598 transitions. [2024-06-27 18:02:44,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314574314574315 [2024-06-27 18:02:44,817 INFO L175 Difference]: Start difference. First operand has 208 places, 236 transitions, 3580 flow. Second operand 42 states and 598 transitions. [2024-06-27 18:02:44,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 475 transitions, 6632 flow [2024-06-27 18:02:45,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 475 transitions, 6342 flow, removed 0 selfloop flow, removed 18 redundant places. [2024-06-27 18:02:45,032 INFO L231 Difference]: Finished difference. Result has 234 places, 293 transitions, 4835 flow [2024-06-27 18:02:45,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3273, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=4835, PETRI_PLACES=234, PETRI_TRANSITIONS=293} [2024-06-27 18:02:45,033 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 203 predicate places. [2024-06-27 18:02:45,033 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 293 transitions, 4835 flow [2024-06-27 18:02:45,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:45,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:45,034 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:45,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:45,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-06-27 18:02:45,235 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:45,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:45,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1522184822, now seen corresponding path program 5 times [2024-06-27 18:02:45,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:45,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593421124] [2024-06-27 18:02:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:45,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:45,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:45,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593421124] [2024-06-27 18:02:45,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593421124] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:45,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620836556] [2024-06-27 18:02:45,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:02:45,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:45,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:45,605 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:45,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-06-27 18:02:45,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 18:02:45,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:45,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 18:02:45,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:45,935 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:02:45,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2024-06-27 18:02:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:02:45,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:46,026 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:02:46,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:02:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:46,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620836556] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:46,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:46,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 19 [2024-06-27 18:02:46,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935101140] [2024-06-27 18:02:46,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:46,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 18:02:46,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:46,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 18:02:46,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-06-27 18:02:46,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:46,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 293 transitions, 4835 flow. Second operand has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:46,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:46,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:46,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:47,525 INFO L124 PetriNetUnfolderBase]: 3162/5707 cut-off events. [2024-06-27 18:02:47,525 INFO L125 PetriNetUnfolderBase]: For 154537/154540 co-relation queries the response was YES. [2024-06-27 18:02:47,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36424 conditions, 5707 events. 3162/5707 cut-off events. For 154537/154540 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39678 event pairs, 876 based on Foata normal form. 17/5722 useless extension candidates. Maximal degree in co-relation 36345. Up to 3772 conditions per place. [2024-06-27 18:02:47,566 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 234 selfloop transitions, 135 changer transitions 16/390 dead transitions. [2024-06-27 18:02:47,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 390 transitions, 6622 flow [2024-06-27 18:02:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 18:02:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 18:02:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 299 transitions. [2024-06-27 18:02:47,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118457300275482 [2024-06-27 18:02:47,568 INFO L175 Difference]: Start difference. First operand has 234 places, 293 transitions, 4835 flow. Second operand 22 states and 299 transitions. [2024-06-27 18:02:47,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 390 transitions, 6622 flow [2024-06-27 18:02:48,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 390 transitions, 5988 flow, removed 195 selfloop flow, removed 25 redundant places. [2024-06-27 18:02:48,098 INFO L231 Difference]: Finished difference. Result has 234 places, 320 transitions, 5254 flow [2024-06-27 18:02:48,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4244, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5254, PETRI_PLACES=234, PETRI_TRANSITIONS=320} [2024-06-27 18:02:48,099 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 203 predicate places. [2024-06-27 18:02:48,099 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 320 transitions, 5254 flow [2024-06-27 18:02:48,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:48,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:48,100 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:48,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:48,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-06-27 18:02:48,300 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:48,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:48,301 INFO L85 PathProgramCache]: Analyzing trace with hash 2128067060, now seen corresponding path program 5 times [2024-06-27 18:02:48,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:48,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140650559] [2024-06-27 18:02:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:48,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:48,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:48,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140650559] [2024-06-27 18:02:48,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140650559] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:48,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932879944] [2024-06-27 18:02:48,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:02:48,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:48,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:48,709 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:48,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-06-27 18:02:48,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 18:02:48,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:48,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 18:02:48,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:49,043 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 18:02:49,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-06-27 18:02:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:02:49,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:49,127 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:02:49,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:02:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:49,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932879944] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:49,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:49,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 21 [2024-06-27 18:02:49,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030556599] [2024-06-27 18:02:49,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:49,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 18:02:49,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:49,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 18:02:49,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2024-06-27 18:02:49,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:49,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 320 transitions, 5254 flow. Second operand has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:49,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:49,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:49,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:50,639 INFO L124 PetriNetUnfolderBase]: 3064/5520 cut-off events. [2024-06-27 18:02:50,640 INFO L125 PetriNetUnfolderBase]: For 125429/125432 co-relation queries the response was YES. [2024-06-27 18:02:50,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34433 conditions, 5520 events. 3064/5520 cut-off events. For 125429/125432 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 37980 event pairs, 851 based on Foata normal form. 14/5532 useless extension candidates. Maximal degree in co-relation 34357. Up to 4069 conditions per place. [2024-06-27 18:02:50,686 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 239 selfloop transitions, 113 changer transitions 13/370 dead transitions. [2024-06-27 18:02:50,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 370 transitions, 6209 flow [2024-06-27 18:02:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 18:02:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 18:02:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 228 transitions. [2024-06-27 18:02:50,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40641711229946526 [2024-06-27 18:02:50,688 INFO L175 Difference]: Start difference. First operand has 234 places, 320 transitions, 5254 flow. Second operand 17 states and 228 transitions. [2024-06-27 18:02:50,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 370 transitions, 6209 flow [2024-06-27 18:02:51,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 370 transitions, 5680 flow, removed 174 selfloop flow, removed 15 redundant places. [2024-06-27 18:02:51,184 INFO L231 Difference]: Finished difference. Result has 235 places, 321 transitions, 4999 flow [2024-06-27 18:02:51,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4736, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4999, PETRI_PLACES=235, PETRI_TRANSITIONS=321} [2024-06-27 18:02:51,185 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 204 predicate places. [2024-06-27 18:02:51,185 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 321 transitions, 4999 flow [2024-06-27 18:02:51,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:51,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:51,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:51,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:51,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:51,387 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:51,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:51,388 INFO L85 PathProgramCache]: Analyzing trace with hash 197771014, now seen corresponding path program 6 times [2024-06-27 18:02:51,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:51,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695880580] [2024-06-27 18:02:51,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:51,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:51,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:51,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695880580] [2024-06-27 18:02:51,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695880580] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:51,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985082909] [2024-06-27 18:02:51,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:02:51,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:51,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:51,838 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:51,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-06-27 18:02:51,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 18:02:51,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:51,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 18:02:51,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:52,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:02:52,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 18:02:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:02:52,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:52,202 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:02:52,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:02:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:52,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985082909] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:52,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:52,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 20 [2024-06-27 18:02:52,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015211142] [2024-06-27 18:02:52,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:52,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:02:52,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:52,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:02:52,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:02:52,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:52,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 321 transitions, 4999 flow. Second operand has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 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) [2024-06-27 18:02:52,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:52,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:52,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:53,652 INFO L124 PetriNetUnfolderBase]: 3052/5476 cut-off events. [2024-06-27 18:02:53,652 INFO L125 PetriNetUnfolderBase]: For 58393/58396 co-relation queries the response was YES. [2024-06-27 18:02:53,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30771 conditions, 5476 events. 3052/5476 cut-off events. For 58393/58396 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 37296 event pairs, 815 based on Foata normal form. 38/5512 useless extension candidates. Maximal degree in co-relation 30696. Up to 3779 conditions per place. [2024-06-27 18:02:53,691 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 240 selfloop transitions, 143 changer transitions 1/389 dead transitions. [2024-06-27 18:02:53,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 389 transitions, 6130 flow [2024-06-27 18:02:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 18:02:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 18:02:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 283 transitions. [2024-06-27 18:02:53,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083694083694084 [2024-06-27 18:02:53,692 INFO L175 Difference]: Start difference. First operand has 235 places, 321 transitions, 4999 flow. Second operand 21 states and 283 transitions. [2024-06-27 18:02:53,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 389 transitions, 6130 flow [2024-06-27 18:02:53,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 389 transitions, 5875 flow, removed 2 selfloop flow, removed 17 redundant places. [2024-06-27 18:02:53,916 INFO L231 Difference]: Finished difference. Result has 238 places, 327 transitions, 5132 flow [2024-06-27 18:02:53,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4744, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5132, PETRI_PLACES=238, PETRI_TRANSITIONS=327} [2024-06-27 18:02:53,917 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 207 predicate places. [2024-06-27 18:02:53,917 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 327 transitions, 5132 flow [2024-06-27 18:02:53,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 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) [2024-06-27 18:02:53,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:53,917 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:53,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:54,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-06-27 18:02:54,118 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:54,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:54,119 INFO L85 PathProgramCache]: Analyzing trace with hash 838810576, now seen corresponding path program 7 times [2024-06-27 18:02:54,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:54,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446165085] [2024-06-27 18:02:54,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:54,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:54,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:54,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446165085] [2024-06-27 18:02:54,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446165085] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:54,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245093090] [2024-06-27 18:02:54,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:02:54,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:54,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:54,482 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:54,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-06-27 18:02:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:54,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 18:02:54,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:54,699 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 18:02:54,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2024-06-27 18:02:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:54,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:54,788 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:02:54,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:02:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:54,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245093090] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:54,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:54,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 19 [2024-06-27 18:02:54,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349548875] [2024-06-27 18:02:54,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:54,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 18:02:54,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:54,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 18:02:54,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-06-27 18:02:54,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:54,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 327 transitions, 5132 flow. Second operand has 20 states, 20 states have (on average 10.15) internal successors, (203), 20 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:54,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:54,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:54,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:56,384 INFO L124 PetriNetUnfolderBase]: 3144/5639 cut-off events. [2024-06-27 18:02:56,384 INFO L125 PetriNetUnfolderBase]: For 62747/62750 co-relation queries the response was YES. [2024-06-27 18:02:56,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32295 conditions, 5639 events. 3144/5639 cut-off events. For 62747/62750 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 38664 event pairs, 729 based on Foata normal form. 38/5675 useless extension candidates. Maximal degree in co-relation 32223. Up to 3452 conditions per place. [2024-06-27 18:02:56,425 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 250 selfloop transitions, 148 changer transitions 1/404 dead transitions. [2024-06-27 18:02:56,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 404 transitions, 6544 flow [2024-06-27 18:02:56,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 18:02:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 18:02:56,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 259 transitions. [2024-06-27 18:02:56,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43602693602693604 [2024-06-27 18:02:56,426 INFO L175 Difference]: Start difference. First operand has 238 places, 327 transitions, 5132 flow. Second operand 18 states and 259 transitions. [2024-06-27 18:02:56,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 404 transitions, 6544 flow [2024-06-27 18:02:56,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 404 transitions, 6241 flow, removed 5 selfloop flow, removed 19 redundant places. [2024-06-27 18:02:56,656 INFO L231 Difference]: Finished difference. Result has 239 places, 329 transitions, 5242 flow [2024-06-27 18:02:56,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5242, PETRI_PLACES=239, PETRI_TRANSITIONS=329} [2024-06-27 18:02:56,657 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 208 predicate places. [2024-06-27 18:02:56,657 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 329 transitions, 5242 flow [2024-06-27 18:02:56,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.15) internal successors, (203), 20 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:56,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:56,657 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:56,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:56,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-06-27 18:02:56,858 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:56,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:56,858 INFO L85 PathProgramCache]: Analyzing trace with hash 756427102, now seen corresponding path program 6 times [2024-06-27 18:02:56,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:56,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549027891] [2024-06-27 18:02:56,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:56,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:57,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:57,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549027891] [2024-06-27 18:02:57,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549027891] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:57,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243556231] [2024-06-27 18:02:57,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:02:57,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:57,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:57,193 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:57,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-06-27 18:02:57,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 18:02:57,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:57,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 18:02:57,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:57,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:02:57,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 18:02:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:02:57,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:57,729 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:02:57,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:02:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:02:57,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243556231] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:57,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:57,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 20 [2024-06-27 18:02:57,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595795406] [2024-06-27 18:02:57,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:57,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:02:57,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:57,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:02:57,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:02:57,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:57,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 329 transitions, 5242 flow. Second operand has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 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) [2024-06-27 18:02:57,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:57,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:57,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:59,419 INFO L124 PetriNetUnfolderBase]: 3204/5787 cut-off events. [2024-06-27 18:02:59,420 INFO L125 PetriNetUnfolderBase]: For 68236/68239 co-relation queries the response was YES. [2024-06-27 18:02:59,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33558 conditions, 5787 events. 3204/5787 cut-off events. For 68236/68239 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 40150 event pairs, 745 based on Foata normal form. 34/5819 useless extension candidates. Maximal degree in co-relation 33483. Up to 3995 conditions per place. [2024-06-27 18:02:59,482 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 284 selfloop transitions, 133 changer transitions 7/429 dead transitions. [2024-06-27 18:02:59,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 429 transitions, 6698 flow [2024-06-27 18:02:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 18:02:59,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 18:02:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 341 transitions. [2024-06-27 18:02:59,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2024-06-27 18:02:59,484 INFO L175 Difference]: Start difference. First operand has 239 places, 329 transitions, 5242 flow. Second operand 25 states and 341 transitions. [2024-06-27 18:02:59,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 429 transitions, 6698 flow [2024-06-27 18:02:59,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 429 transitions, 6430 flow, removed 14 selfloop flow, removed 14 redundant places. [2024-06-27 18:02:59,785 INFO L231 Difference]: Finished difference. Result has 253 places, 340 transitions, 5503 flow [2024-06-27 18:02:59,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4932, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5503, PETRI_PLACES=253, PETRI_TRANSITIONS=340} [2024-06-27 18:02:59,786 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 222 predicate places. [2024-06-27 18:02:59,786 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 340 transitions, 5503 flow [2024-06-27 18:02:59,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 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) [2024-06-27 18:02:59,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:59,787 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:59,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:59,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-06-27 18:02:59,992 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:59,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:59,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1804352752, now seen corresponding path program 8 times [2024-06-27 18:02:59,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:59,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774382752] [2024-06-27 18:02:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:59,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:00,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:00,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774382752] [2024-06-27 18:03:00,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774382752] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:00,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814363888] [2024-06-27 18:03:00,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:03:00,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:00,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:00,496 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:00,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-06-27 18:03:00,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:03:00,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:00,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 18:03:00,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:00,821 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:00,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 18:03:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:03:00,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:00,908 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:03:00,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:03:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 18:03:00,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814363888] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:00,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:00,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 20 [2024-06-27 18:03:00,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038684099] [2024-06-27 18:03:00,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:00,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:03:00,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:00,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:03:00,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:03:01,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:01,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 340 transitions, 5503 flow. Second operand has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 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) [2024-06-27 18:03:01,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:01,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:01,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:02,355 INFO L124 PetriNetUnfolderBase]: 3184/5731 cut-off events. [2024-06-27 18:03:02,355 INFO L125 PetriNetUnfolderBase]: For 72649/72649 co-relation queries the response was YES. [2024-06-27 18:03:02,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33995 conditions, 5731 events. 3184/5731 cut-off events. For 72649/72649 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 39111 event pairs, 871 based on Foata normal form. 15/5745 useless extension candidates. Maximal degree in co-relation 33917. Up to 4302 conditions per place. [2024-06-27 18:03:02,403 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 264 selfloop transitions, 123 changer transitions 9/401 dead transitions. [2024-06-27 18:03:02,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 401 transitions, 6664 flow [2024-06-27 18:03:02,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 18:03:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 18:03:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 259 transitions. [2024-06-27 18:03:02,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924242424242424 [2024-06-27 18:03:02,404 INFO L175 Difference]: Start difference. First operand has 253 places, 340 transitions, 5503 flow. Second operand 20 states and 259 transitions. [2024-06-27 18:03:02,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 401 transitions, 6664 flow [2024-06-27 18:03:02,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 401 transitions, 6459 flow, removed 43 selfloop flow, removed 12 redundant places. [2024-06-27 18:03:02,809 INFO L231 Difference]: Finished difference. Result has 260 places, 348 transitions, 5730 flow [2024-06-27 18:03:02,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5249, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5730, PETRI_PLACES=260, PETRI_TRANSITIONS=348} [2024-06-27 18:03:02,810 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 229 predicate places. [2024-06-27 18:03:02,810 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 348 transitions, 5730 flow [2024-06-27 18:03:02,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 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) [2024-06-27 18:03:02,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:02,810 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:02,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-06-27 18:03:03,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:03,011 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:03,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:03,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1789251298, now seen corresponding path program 7 times [2024-06-27 18:03:03,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:03,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138735585] [2024-06-27 18:03:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:03,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:03,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:03,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138735585] [2024-06-27 18:03:03,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138735585] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:03,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050272649] [2024-06-27 18:03:03,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:03:03,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:03,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:03,341 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:03,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-06-27 18:03:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:03,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 18:03:03,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:03,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:03,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-06-27 18:03:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:03,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:03,605 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:03:03,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:03:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:03,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050272649] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:03,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:03,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 18 [2024-06-27 18:03:03,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352397976] [2024-06-27 18:03:03,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:03,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 18:03:03,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:03,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 18:03:03,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-06-27 18:03:03,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:03,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 348 transitions, 5730 flow. Second operand has 19 states, 19 states have (on average 10.052631578947368) internal successors, (191), 19 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:03,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:03,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:03,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:04,948 INFO L124 PetriNetUnfolderBase]: 2866/5107 cut-off events. [2024-06-27 18:03:04,949 INFO L125 PetriNetUnfolderBase]: For 68428/68431 co-relation queries the response was YES. [2024-06-27 18:03:04,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31084 conditions, 5107 events. 2866/5107 cut-off events. For 68428/68431 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 33708 event pairs, 721 based on Foata normal form. 86/5191 useless extension candidates. Maximal degree in co-relation 31001. Up to 3936 conditions per place. [2024-06-27 18:03:04,995 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 256 selfloop transitions, 125 changer transitions 2/388 dead transitions. [2024-06-27 18:03:04,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 388 transitions, 6624 flow [2024-06-27 18:03:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 18:03:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 18:03:04,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 249 transitions. [2024-06-27 18:03:04,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39712918660287083 [2024-06-27 18:03:04,996 INFO L175 Difference]: Start difference. First operand has 260 places, 348 transitions, 5730 flow. Second operand 19 states and 249 transitions. [2024-06-27 18:03:04,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 388 transitions, 6624 flow [2024-06-27 18:03:05,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 388 transitions, 6316 flow, removed 33 selfloop flow, removed 19 redundant places. [2024-06-27 18:03:05,270 INFO L231 Difference]: Finished difference. Result has 256 places, 338 transitions, 5575 flow [2024-06-27 18:03:05,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5320, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5575, PETRI_PLACES=256, PETRI_TRANSITIONS=338} [2024-06-27 18:03:05,271 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 225 predicate places. [2024-06-27 18:03:05,271 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 338 transitions, 5575 flow [2024-06-27 18:03:05,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.052631578947368) internal successors, (191), 19 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:05,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:05,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:05,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:05,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:05,472 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:05,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:05,472 INFO L85 PathProgramCache]: Analyzing trace with hash 803104232, now seen corresponding path program 8 times [2024-06-27 18:03:05,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:05,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648107246] [2024-06-27 18:03:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:05,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:05,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:05,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648107246] [2024-06-27 18:03:05,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648107246] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:05,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794507062] [2024-06-27 18:03:05,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:03:05,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:05,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:05,856 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:05,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-06-27 18:03:05,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:03:05,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:05,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 18:03:05,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:06,226 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 18:03:06,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-06-27 18:03:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:03:06,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:06,334 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 18:03:06,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 18:03:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:06,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794507062] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:06,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:06,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 22 [2024-06-27 18:03:06,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080023121] [2024-06-27 18:03:06,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:06,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 18:03:06,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:06,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 18:03:06,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-06-27 18:03:06,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:06,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 338 transitions, 5575 flow. Second operand has 23 states, 23 states have (on average 9.652173913043478) internal successors, (222), 23 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:06,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:06,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:06,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:07,703 INFO L124 PetriNetUnfolderBase]: 2954/5269 cut-off events. [2024-06-27 18:03:07,703 INFO L125 PetriNetUnfolderBase]: For 67632/67635 co-relation queries the response was YES. [2024-06-27 18:03:07,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31961 conditions, 5269 events. 2954/5269 cut-off events. For 67632/67635 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 35158 event pairs, 647 based on Foata normal form. 14/5281 useless extension candidates. Maximal degree in co-relation 31886. Up to 4276 conditions per place. [2024-06-27 18:03:07,754 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 357 selfloop transitions, 56 changer transitions 20/438 dead transitions. [2024-06-27 18:03:07,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 438 transitions, 7348 flow [2024-06-27 18:03:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 18:03:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 18:03:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 263 transitions. [2024-06-27 18:03:07,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194577352472089 [2024-06-27 18:03:07,755 INFO L175 Difference]: Start difference. First operand has 256 places, 338 transitions, 5575 flow. Second operand 19 states and 263 transitions. [2024-06-27 18:03:07,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 438 transitions, 7348 flow [2024-06-27 18:03:08,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 438 transitions, 7078 flow, removed 5 selfloop flow, removed 19 redundant places. [2024-06-27 18:03:08,058 INFO L231 Difference]: Finished difference. Result has 261 places, 360 transitions, 5861 flow [2024-06-27 18:03:08,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5861, PETRI_PLACES=261, PETRI_TRANSITIONS=360} [2024-06-27 18:03:08,059 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 230 predicate places. [2024-06-27 18:03:08,059 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 360 transitions, 5861 flow [2024-06-27 18:03:08,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.652173913043478) internal successors, (222), 23 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:08,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:08,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:08,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:08,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:08,261 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:08,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:08,261 INFO L85 PathProgramCache]: Analyzing trace with hash 386575808, now seen corresponding path program 9 times [2024-06-27 18:03:08,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:08,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414877644] [2024-06-27 18:03:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:08,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:08,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:08,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414877644] [2024-06-27 18:03:08,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414877644] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:08,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161149688] [2024-06-27 18:03:08,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:03:08,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:08,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:08,629 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:08,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-06-27 18:03:08,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 18:03:08,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:08,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 43 conjunts are in the unsatisfiable core [2024-06-27 18:03:08,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:08,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 18:03:09,044 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 18:03:09,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-06-27 18:03:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:09,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:09,257 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:09,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2024-06-27 18:03:09,295 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 18:03:09,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2024-06-27 18:03:09,335 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 18:03:09,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 194 [2024-06-27 18:03:09,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:03:09,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161149688] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:09,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:09,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 26 [2024-06-27 18:03:09,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675104615] [2024-06-27 18:03:09,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:09,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 18:03:09,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 18:03:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2024-06-27 18:03:09,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:09,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 360 transitions, 5861 flow. Second operand has 27 states, 27 states have (on average 9.333333333333334) internal successors, (252), 27 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:09,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:09,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:09,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:11,226 INFO L124 PetriNetUnfolderBase]: 2948/5283 cut-off events. [2024-06-27 18:03:11,227 INFO L125 PetriNetUnfolderBase]: For 70063/70066 co-relation queries the response was YES. [2024-06-27 18:03:11,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32262 conditions, 5283 events. 2948/5283 cut-off events. For 70063/70066 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 35286 event pairs, 813 based on Foata normal form. 10/5291 useless extension candidates. Maximal degree in co-relation 32181. Up to 4790 conditions per place. [2024-06-27 18:03:11,281 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 354 selfloop transitions, 35 changer transitions 29/423 dead transitions. [2024-06-27 18:03:11,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 423 transitions, 7192 flow [2024-06-27 18:03:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 18:03:11,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 18:03:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 227 transitions. [2024-06-27 18:03:11,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40463458110516937 [2024-06-27 18:03:11,282 INFO L175 Difference]: Start difference. First operand has 261 places, 360 transitions, 5861 flow. Second operand 17 states and 227 transitions. [2024-06-27 18:03:11,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 423 transitions, 7192 flow [2024-06-27 18:03:11,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 423 transitions, 6862 flow, removed 141 selfloop flow, removed 9 redundant places. [2024-06-27 18:03:11,620 INFO L231 Difference]: Finished difference. Result has 272 places, 358 transitions, 5681 flow [2024-06-27 18:03:11,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5681, PETRI_PLACES=272, PETRI_TRANSITIONS=358} [2024-06-27 18:03:11,621 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 241 predicate places. [2024-06-27 18:03:11,621 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 358 transitions, 5681 flow [2024-06-27 18:03:11,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.333333333333334) internal successors, (252), 27 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:11,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:11,621 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:11,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:11,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-06-27 18:03:11,822 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:11,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:11,822 INFO L85 PathProgramCache]: Analyzing trace with hash -908083548, now seen corresponding path program 10 times [2024-06-27 18:03:11,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:11,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725377573] [2024-06-27 18:03:11,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:11,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:12,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:12,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725377573] [2024-06-27 18:03:12,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725377573] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:12,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410409995] [2024-06-27 18:03:12,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:03:12,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:12,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:12,198 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:12,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-06-27 18:03:12,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:03:12,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:12,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 18:03:12,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:12,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:12,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-06-27 18:03:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:12,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:12,541 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 18:03:12,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 18:03:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:12,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410409995] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:12,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:12,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19 [2024-06-27 18:03:12,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773659565] [2024-06-27 18:03:12,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:12,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 18:03:12,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:12,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 18:03:12,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-06-27 18:03:12,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:12,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 358 transitions, 5681 flow. Second operand has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:12,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:12,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:12,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:14,079 INFO L124 PetriNetUnfolderBase]: 3007/5383 cut-off events. [2024-06-27 18:03:14,080 INFO L125 PetriNetUnfolderBase]: For 65561/65564 co-relation queries the response was YES. [2024-06-27 18:03:14,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31827 conditions, 5383 events. 3007/5383 cut-off events. For 65561/65564 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 36149 event pairs, 667 based on Foata normal form. 30/5411 useless extension candidates. Maximal degree in co-relation 31741. Up to 4252 conditions per place. [2024-06-27 18:03:14,135 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 360 selfloop transitions, 72 changer transitions 3/440 dead transitions. [2024-06-27 18:03:14,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 440 transitions, 7267 flow [2024-06-27 18:03:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 18:03:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 18:03:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 250 transitions. [2024-06-27 18:03:14,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208754208754209 [2024-06-27 18:03:14,137 INFO L175 Difference]: Start difference. First operand has 272 places, 358 transitions, 5681 flow. Second operand 18 states and 250 transitions. [2024-06-27 18:03:14,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 440 transitions, 7267 flow [2024-06-27 18:03:14,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 440 transitions, 7124 flow, removed 38 selfloop flow, removed 12 redundant places. [2024-06-27 18:03:14,449 INFO L231 Difference]: Finished difference. Result has 276 places, 372 transitions, 6021 flow [2024-06-27 18:03:14,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5594, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6021, PETRI_PLACES=276, PETRI_TRANSITIONS=372} [2024-06-27 18:03:14,449 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 245 predicate places. [2024-06-27 18:03:14,450 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 372 transitions, 6021 flow [2024-06-27 18:03:14,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:14,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:14,450 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:14,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:14,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-06-27 18:03:14,650 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:14,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:14,651 INFO L85 PathProgramCache]: Analyzing trace with hash -258575294, now seen corresponding path program 11 times [2024-06-27 18:03:14,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:14,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793829651] [2024-06-27 18:03:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:14,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:14,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:14,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793829651] [2024-06-27 18:03:14,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793829651] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:14,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500247631] [2024-06-27 18:03:14,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:03:14,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:14,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:14,989 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:15,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-06-27 18:03:15,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 18:03:15,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:15,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 18:03:15,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:15,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:15,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2024-06-27 18:03:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:03:15,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:15,382 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:03:15,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:03:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 18:03:15,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500247631] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:15,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:15,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 20 [2024-06-27 18:03:15,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297871785] [2024-06-27 18:03:15,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:15,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:03:15,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:15,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:03:15,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:03:15,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:15,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 372 transitions, 6021 flow. Second operand has 21 states, 21 states have (on average 9.80952380952381) internal successors, (206), 21 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:15,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:15,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:15,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:17,186 INFO L124 PetriNetUnfolderBase]: 3314/5992 cut-off events. [2024-06-27 18:03:17,186 INFO L125 PetriNetUnfolderBase]: For 81759/81759 co-relation queries the response was YES. [2024-06-27 18:03:17,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35653 conditions, 5992 events. 3314/5992 cut-off events. For 81759/81759 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 41618 event pairs, 785 based on Foata normal form. 42/6033 useless extension candidates. Maximal degree in co-relation 35566. Up to 4485 conditions per place. [2024-06-27 18:03:17,255 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 382 selfloop transitions, 93 changer transitions 6/486 dead transitions. [2024-06-27 18:03:17,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 486 transitions, 7975 flow [2024-06-27 18:03:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 18:03:17,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 18:03:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 313 transitions. [2024-06-27 18:03:17,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43112947658402206 [2024-06-27 18:03:17,257 INFO L175 Difference]: Start difference. First operand has 276 places, 372 transitions, 6021 flow. Second operand 22 states and 313 transitions. [2024-06-27 18:03:17,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 486 transitions, 7975 flow [2024-06-27 18:03:17,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 486 transitions, 7770 flow, removed 50 selfloop flow, removed 14 redundant places. [2024-06-27 18:03:17,636 INFO L231 Difference]: Finished difference. Result has 291 places, 405 transitions, 6758 flow [2024-06-27 18:03:17,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5848, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6758, PETRI_PLACES=291, PETRI_TRANSITIONS=405} [2024-06-27 18:03:17,637 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 260 predicate places. [2024-06-27 18:03:17,637 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 405 transitions, 6758 flow [2024-06-27 18:03:17,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.80952380952381) internal successors, (206), 21 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:17,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:17,637 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:17,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:17,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:17,838 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:17,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:17,838 INFO L85 PathProgramCache]: Analyzing trace with hash 802196074, now seen corresponding path program 9 times [2024-06-27 18:03:17,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:17,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389285157] [2024-06-27 18:03:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:17,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:18,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:18,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389285157] [2024-06-27 18:03:18,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389285157] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:18,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98636087] [2024-06-27 18:03:18,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:03:18,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:18,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:18,190 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:18,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-06-27 18:03:18,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 18:03:18,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:18,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 53 conjunts are in the unsatisfiable core [2024-06-27 18:03:18,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:18,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 18:03:18,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 18:03:18,425 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 18:03:18,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 18:03:18,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 18:03:18,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-27 18:03:18,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2024-06-27 18:03:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:18,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:18,955 INFO L349 Elim1Store]: treesize reduction 38, result has 53.7 percent of original size [2024-06-27 18:03:18,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 128 treesize of output 125 [2024-06-27 18:03:19,032 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~i_AB~0 4)) (.cse0 (* c_~i_BA~0 4))) (let ((.cse5 (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|)) (.cse10 (not (= c_~i_BA~0 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|))) (.cse2 (+ c_~A~0.offset .cse0 4)) (.cse6 (+ c_~A~0.offset 4 .cse4))) (and (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_2 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_2) c_~A~0.base))) (let ((.cse3 (select .cse1 .cse6))) (or (not (= (select v_arrayElimArr_2 (+ .cse0 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse1 .cse2))) (= .cse3 (select v_arrayElimArr_2 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse4))) (= .cse3 (select v_arrayElimArr_2 (+ .cse5 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))))) (or (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_2 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_2) c_~A~0.base))) (let ((.cse9 (select .cse7 .cse6)) (.cse8 (select v_arrayElimArr_2 (+ .cse5 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (or (not (= (select .cse7 .cse2) .cse8)) (= .cse9 (select v_arrayElimArr_2 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse4))) (= .cse9 .cse8))))) .cse10) (or (= c_~i_AB~0 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) (and (or (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_2 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_2) c_~A~0.base))) (or (not (= (select .cse11 .cse2) (select v_arrayElimArr_2 (+ .cse5 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (= (select .cse11 .cse6) (select v_arrayElimArr_2 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse4)))))) .cse10) (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_2 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_2) c_~A~0.base))) (or (not (= (select v_arrayElimArr_2 (+ .cse0 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse12 .cse2))) (= (select .cse12 .cse6) (select v_arrayElimArr_2 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse4))))))))))) is different from false [2024-06-27 18:03:19,229 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:19,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 77 [2024-06-27 18:03:19,239 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 18:03:19,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 109 [2024-06-27 18:03:19,318 INFO L349 Elim1Store]: treesize reduction 16, result has 84.8 percent of original size [2024-06-27 18:03:19,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 137 [2024-06-27 18:03:19,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:19,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2024-06-27 18:03:19,520 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 18:03:19,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 67 [2024-06-27 18:03:19,553 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2024-06-27 18:03:19,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 74 [2024-06-27 18:03:19,604 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:19,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2024-06-27 18:03:19,612 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 18:03:19,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 79 [2024-06-27 18:03:19,645 INFO L349 Elim1Store]: treesize reduction 16, result has 75.4 percent of original size [2024-06-27 18:03:19,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 82 [2024-06-27 18:03:19,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:19,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 71 [2024-06-27 18:03:19,706 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 18:03:19,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 100 [2024-06-27 18:03:19,740 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2024-06-27 18:03:19,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 89 [2024-06-27 18:03:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 2 times theorem prover too weak. 1 trivial. 2 not checked. [2024-06-27 18:03:19,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98636087] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:19,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:19,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 32 [2024-06-27 18:03:19,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473007708] [2024-06-27 18:03:19,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:19,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 18:03:19,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:19,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 18:03:19,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=826, Unknown=2, NotChecked=60, Total=1056 [2024-06-27 18:03:19,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 18:03:19,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 405 transitions, 6758 flow. Second operand has 33 states, 33 states have (on average 8.06060606060606) internal successors, (266), 33 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:19,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:19,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 18:03:19,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:22,509 INFO L124 PetriNetUnfolderBase]: 5551/9448 cut-off events. [2024-06-27 18:03:22,510 INFO L125 PetriNetUnfolderBase]: For 123349/123352 co-relation queries the response was YES. [2024-06-27 18:03:22,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56130 conditions, 9448 events. 5551/9448 cut-off events. For 123349/123352 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 65023 event pairs, 1214 based on Foata normal form. 38/9484 useless extension candidates. Maximal degree in co-relation 56037. Up to 8144 conditions per place. [2024-06-27 18:03:22,628 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 443 selfloop transitions, 49 changer transitions 1/497 dead transitions. [2024-06-27 18:03:22,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 497 transitions, 8711 flow [2024-06-27 18:03:22,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 18:03:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 18:03:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 256 transitions. [2024-06-27 18:03:22,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082934609250399 [2024-06-27 18:03:22,630 INFO L175 Difference]: Start difference. First operand has 291 places, 405 transitions, 6758 flow. Second operand 19 states and 256 transitions. [2024-06-27 18:03:22,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 497 transitions, 8711 flow [2024-06-27 18:03:23,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 497 transitions, 8355 flow, removed 143 selfloop flow, removed 11 redundant places. [2024-06-27 18:03:23,475 INFO L231 Difference]: Finished difference. Result has 302 places, 409 transitions, 6661 flow [2024-06-27 18:03:23,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6460, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6661, PETRI_PLACES=302, PETRI_TRANSITIONS=409} [2024-06-27 18:03:23,476 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 271 predicate places. [2024-06-27 18:03:23,476 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 409 transitions, 6661 flow [2024-06-27 18:03:23,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 8.06060606060606) internal successors, (266), 33 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:23,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:23,477 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:23,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:23,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-06-27 18:03:23,677 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:23,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:23,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1558504896, now seen corresponding path program 12 times [2024-06-27 18:03:23,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:23,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719833428] [2024-06-27 18:03:23,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:23,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:24,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:24,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719833428] [2024-06-27 18:03:24,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719833428] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:24,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998045693] [2024-06-27 18:03:24,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:03:24,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:24,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:24,060 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:24,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-06-27 18:03:24,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 18:03:24,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:24,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 18:03:24,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:24,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:24,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 18:03:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:24,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:24,515 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 18:03:24,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 18:03:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:24,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998045693] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:24,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:24,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 21 [2024-06-27 18:03:24,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366889188] [2024-06-27 18:03:24,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:24,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 18:03:24,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:24,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 18:03:24,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-06-27 18:03:24,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:24,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 409 transitions, 6661 flow. Second operand has 22 states, 22 states have (on average 9.636363636363637) internal successors, (212), 22 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:24,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:24,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:24,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:26,316 INFO L124 PetriNetUnfolderBase]: 3393/6128 cut-off events. [2024-06-27 18:03:26,316 INFO L125 PetriNetUnfolderBase]: For 78304/78307 co-relation queries the response was YES. [2024-06-27 18:03:26,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36851 conditions, 6128 events. 3393/6128 cut-off events. For 78304/78307 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 42564 event pairs, 839 based on Foata normal form. 14/6140 useless extension candidates. Maximal degree in co-relation 36754. Up to 5020 conditions per place. [2024-06-27 18:03:26,378 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 388 selfloop transitions, 79 changer transitions 8/480 dead transitions. [2024-06-27 18:03:26,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 480 transitions, 7988 flow [2024-06-27 18:03:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 18:03:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 18:03:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 273 transitions. [2024-06-27 18:03:26,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-27 18:03:26,380 INFO L175 Difference]: Start difference. First operand has 302 places, 409 transitions, 6661 flow. Second operand 20 states and 273 transitions. [2024-06-27 18:03:26,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 480 transitions, 7988 flow [2024-06-27 18:03:26,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 480 transitions, 7809 flow, removed 26 selfloop flow, removed 14 redundant places. [2024-06-27 18:03:26,749 INFO L231 Difference]: Finished difference. Result has 309 places, 409 transitions, 6663 flow [2024-06-27 18:03:26,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6417, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6663, PETRI_PLACES=309, PETRI_TRANSITIONS=409} [2024-06-27 18:03:26,750 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 278 predicate places. [2024-06-27 18:03:26,750 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 409 transitions, 6663 flow [2024-06-27 18:03:26,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.636363636363637) internal successors, (212), 22 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:26,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:26,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:26,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:26,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-06-27 18:03:26,960 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:26,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:26,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1231458002, now seen corresponding path program 13 times [2024-06-27 18:03:26,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:26,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136009494] [2024-06-27 18:03:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:26,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:27,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:27,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136009494] [2024-06-27 18:03:27,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136009494] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:27,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256531449] [2024-06-27 18:03:27,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:03:27,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:27,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:27,254 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:27,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-06-27 18:03:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:27,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 18:03:27,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:27,465 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 18:03:27,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2024-06-27 18:03:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:27,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:27,532 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:03:27,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:03:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 18:03:27,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256531449] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:27,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:27,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 19 [2024-06-27 18:03:27,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966345998] [2024-06-27 18:03:27,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:27,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 18:03:27,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:27,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 18:03:27,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-06-27 18:03:27,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:27,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 409 transitions, 6663 flow. Second operand has 20 states, 20 states have (on average 9.95) internal successors, (199), 20 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:27,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:27,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:27,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:29,143 INFO L124 PetriNetUnfolderBase]: 3345/6016 cut-off events. [2024-06-27 18:03:29,143 INFO L125 PetriNetUnfolderBase]: For 81692/81692 co-relation queries the response was YES. [2024-06-27 18:03:29,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36161 conditions, 6016 events. 3345/6016 cut-off events. For 81692/81692 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 41151 event pairs, 624 based on Foata normal form. 62/6077 useless extension candidates. Maximal degree in co-relation 36063. Up to 4200 conditions per place. [2024-06-27 18:03:29,204 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 393 selfloop transitions, 106 changer transitions 5/509 dead transitions. [2024-06-27 18:03:29,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 509 transitions, 8586 flow [2024-06-27 18:03:29,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 18:03:29,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 18:03:29,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 295 transitions. [2024-06-27 18:03:29,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-27 18:03:29,206 INFO L175 Difference]: Start difference. First operand has 309 places, 409 transitions, 6663 flow. Second operand 20 states and 295 transitions. [2024-06-27 18:03:29,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 509 transitions, 8586 flow [2024-06-27 18:03:29,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 509 transitions, 8380 flow, removed 26 selfloop flow, removed 17 redundant places. [2024-06-27 18:03:29,570 INFO L231 Difference]: Finished difference. Result has 312 places, 413 transitions, 6812 flow [2024-06-27 18:03:29,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6477, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6812, PETRI_PLACES=312, PETRI_TRANSITIONS=413} [2024-06-27 18:03:29,571 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 281 predicate places. [2024-06-27 18:03:29,571 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 413 transitions, 6812 flow [2024-06-27 18:03:29,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.95) internal successors, (199), 20 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:29,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:29,572 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:29,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:29,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:29,776 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:29,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:29,776 INFO L85 PathProgramCache]: Analyzing trace with hash 74774846, now seen corresponding path program 10 times [2024-06-27 18:03:29,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:29,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516916296] [2024-06-27 18:03:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:29,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:30,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:30,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516916296] [2024-06-27 18:03:30,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516916296] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:30,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889431300] [2024-06-27 18:03:30,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:03:30,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:30,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:30,086 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:30,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-06-27 18:03:30,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:03:30,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:30,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 18:03:30,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:30,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:30,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2024-06-27 18:03:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:30,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:30,388 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 18:03:30,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 18:03:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:30,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889431300] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:30,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:30,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 18 [2024-06-27 18:03:30,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235069313] [2024-06-27 18:03:30,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:30,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 18:03:30,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:30,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 18:03:30,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-06-27 18:03:30,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:30,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 413 transitions, 6812 flow. Second operand has 19 states, 19 states have (on average 9.473684210526315) internal successors, (180), 19 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:30,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:30,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:30,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:32,139 INFO L124 PetriNetUnfolderBase]: 3667/6594 cut-off events. [2024-06-27 18:03:32,139 INFO L125 PetriNetUnfolderBase]: For 82663/82666 co-relation queries the response was YES. [2024-06-27 18:03:32,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39737 conditions, 6594 events. 3667/6594 cut-off events. For 82663/82666 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 46206 event pairs, 823 based on Foata normal form. 17/6609 useless extension candidates. Maximal degree in co-relation 39636. Up to 5200 conditions per place. [2024-06-27 18:03:32,211 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 425 selfloop transitions, 98 changer transitions 13/541 dead transitions. [2024-06-27 18:03:32,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 541 transitions, 8933 flow [2024-06-27 18:03:32,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 18:03:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 18:03:32,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 369 transitions. [2024-06-27 18:03:32,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2024-06-27 18:03:32,212 INFO L175 Difference]: Start difference. First operand has 312 places, 413 transitions, 6812 flow. Second operand 28 states and 369 transitions. [2024-06-27 18:03:32,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 541 transitions, 8933 flow [2024-06-27 18:03:32,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 541 transitions, 8630 flow, removed 46 selfloop flow, removed 17 redundant places. [2024-06-27 18:03:32,677 INFO L231 Difference]: Finished difference. Result has 328 places, 441 transitions, 7350 flow [2024-06-27 18:03:32,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6524, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7350, PETRI_PLACES=328, PETRI_TRANSITIONS=441} [2024-06-27 18:03:32,678 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 297 predicate places. [2024-06-27 18:03:32,678 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 441 transitions, 7350 flow [2024-06-27 18:03:32,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.473684210526315) internal successors, (180), 19 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:32,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:32,679 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:32,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:32,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:32,895 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:32,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:32,895 INFO L85 PathProgramCache]: Analyzing trace with hash -222671814, now seen corresponding path program 14 times [2024-06-27 18:03:32,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:32,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178377443] [2024-06-27 18:03:32,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:32,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:33,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:33,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178377443] [2024-06-27 18:03:33,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178377443] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:33,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452044844] [2024-06-27 18:03:33,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:03:33,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:33,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:33,207 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:33,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-06-27 18:03:33,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:03:33,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:33,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 18:03:33,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:33,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:33,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 18:03:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:03:33,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:33,586 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:03:33,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:03:33,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 18:03:33,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452044844] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:33,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:33,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 20 [2024-06-27 18:03:33,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201953432] [2024-06-27 18:03:33,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:33,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:03:33,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:33,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:03:33,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:03:33,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:33,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 441 transitions, 7350 flow. Second operand has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 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) [2024-06-27 18:03:33,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:33,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:33,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:35,407 INFO L124 PetriNetUnfolderBase]: 3556/6354 cut-off events. [2024-06-27 18:03:35,407 INFO L125 PetriNetUnfolderBase]: For 84574/84574 co-relation queries the response was YES. [2024-06-27 18:03:35,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39264 conditions, 6354 events. 3556/6354 cut-off events. For 84574/84574 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 43684 event pairs, 921 based on Foata normal form. 8/6361 useless extension candidates. Maximal degree in co-relation 39159. Up to 5236 conditions per place. [2024-06-27 18:03:35,481 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 398 selfloop transitions, 84 changer transitions 12/499 dead transitions. [2024-06-27 18:03:35,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 499 transitions, 8535 flow [2024-06-27 18:03:35,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 18:03:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 18:03:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 279 transitions. [2024-06-27 18:03:35,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-27 18:03:35,483 INFO L175 Difference]: Start difference. First operand has 328 places, 441 transitions, 7350 flow. Second operand 21 states and 279 transitions. [2024-06-27 18:03:35,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 499 transitions, 8535 flow [2024-06-27 18:03:35,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 499 transitions, 8226 flow, removed 96 selfloop flow, removed 15 redundant places. [2024-06-27 18:03:35,987 INFO L231 Difference]: Finished difference. Result has 331 places, 437 transitions, 7155 flow [2024-06-27 18:03:35,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7006, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7155, PETRI_PLACES=331, PETRI_TRANSITIONS=437} [2024-06-27 18:03:35,988 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 300 predicate places. [2024-06-27 18:03:35,988 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 437 transitions, 7155 flow [2024-06-27 18:03:35,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 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) [2024-06-27 18:03:35,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:35,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:36,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:36,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:36,189 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:36,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:36,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1776798444, now seen corresponding path program 11 times [2024-06-27 18:03:36,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:36,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295710353] [2024-06-27 18:03:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:36,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:36,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:36,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295710353] [2024-06-27 18:03:36,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295710353] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:36,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261808465] [2024-06-27 18:03:36,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:03:36,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:36,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:36,492 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:36,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-06-27 18:03:36,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 18:03:36,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:36,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 18:03:36,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:36,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:36,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2024-06-27 18:03:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:03:36,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:36,894 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 18:03:36,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 18:03:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:36,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261808465] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:36,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:36,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 20 [2024-06-27 18:03:36,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820702863] [2024-06-27 18:03:36,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:36,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:03:36,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:36,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:03:36,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:03:37,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:37,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 437 transitions, 7155 flow. Second operand has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 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) [2024-06-27 18:03:37,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:37,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:37,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:39,036 INFO L124 PetriNetUnfolderBase]: 3586/6385 cut-off events. [2024-06-27 18:03:39,037 INFO L125 PetriNetUnfolderBase]: For 86249/86252 co-relation queries the response was YES. [2024-06-27 18:03:39,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39468 conditions, 6385 events. 3586/6385 cut-off events. For 86249/86252 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 43822 event pairs, 738 based on Foata normal form. 62/6445 useless extension candidates. Maximal degree in co-relation 39362. Up to 5022 conditions per place. [2024-06-27 18:03:39,104 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 441 selfloop transitions, 111 changer transitions 2/559 dead transitions. [2024-06-27 18:03:39,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 559 transitions, 9151 flow [2024-06-27 18:03:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-27 18:03:39,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-27 18:03:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 434 transitions. [2024-06-27 18:03:39,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3868092691622103 [2024-06-27 18:03:39,106 INFO L175 Difference]: Start difference. First operand has 331 places, 437 transitions, 7155 flow. Second operand 34 states and 434 transitions. [2024-06-27 18:03:39,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 559 transitions, 9151 flow [2024-06-27 18:03:39,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 559 transitions, 8924 flow, removed 8 selfloop flow, removed 22 redundant places. [2024-06-27 18:03:39,598 INFO L231 Difference]: Finished difference. Result has 342 places, 453 transitions, 7477 flow [2024-06-27 18:03:39,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6956, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7477, PETRI_PLACES=342, PETRI_TRANSITIONS=453} [2024-06-27 18:03:39,599 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 311 predicate places. [2024-06-27 18:03:39,599 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 453 transitions, 7477 flow [2024-06-27 18:03:39,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 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) [2024-06-27 18:03:39,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:39,599 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:39,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:39,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-06-27 18:03:39,815 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:39,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:39,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1443492174, now seen corresponding path program 12 times [2024-06-27 18:03:39,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:39,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725748720] [2024-06-27 18:03:39,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:39,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:40,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:40,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725748720] [2024-06-27 18:03:40,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725748720] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:40,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665528529] [2024-06-27 18:03:40,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:03:40,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:40,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:40,153 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:40,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-06-27 18:03:40,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 18:03:40,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:40,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 18:03:40,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:40,548 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 18:03:40,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-06-27 18:03:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:40,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:40,662 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 18:03:40,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 18:03:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:40,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665528529] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:40,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:40,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 22 [2024-06-27 18:03:40,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929147920] [2024-06-27 18:03:40,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:40,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 18:03:40,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:40,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 18:03:40,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-06-27 18:03:40,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:40,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 453 transitions, 7477 flow. Second operand has 23 states, 23 states have (on average 9.73913043478261) internal successors, (224), 23 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:40,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:40,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:40,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:42,878 INFO L124 PetriNetUnfolderBase]: 3875/6887 cut-off events. [2024-06-27 18:03:42,879 INFO L125 PetriNetUnfolderBase]: For 109904/109907 co-relation queries the response was YES. [2024-06-27 18:03:42,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44168 conditions, 6887 events. 3875/6887 cut-off events. For 109904/109907 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 47535 event pairs, 768 based on Foata normal form. 92/6977 useless extension candidates. Maximal degree in co-relation 44062. Up to 4858 conditions per place. [2024-06-27 18:03:42,957 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 460 selfloop transitions, 151 changer transitions 6/622 dead transitions. [2024-06-27 18:03:42,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 622 transitions, 10649 flow [2024-06-27 18:03:42,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-06-27 18:03:42,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-06-27 18:03:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 494 transitions. [2024-06-27 18:03:42,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045864045864046 [2024-06-27 18:03:42,959 INFO L175 Difference]: Start difference. First operand has 342 places, 453 transitions, 7477 flow. Second operand 37 states and 494 transitions. [2024-06-27 18:03:42,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 622 transitions, 10649 flow [2024-06-27 18:03:43,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 622 transitions, 10328 flow, removed 23 selfloop flow, removed 25 redundant places. [2024-06-27 18:03:43,682 INFO L231 Difference]: Finished difference. Result has 359 places, 494 transitions, 8338 flow [2024-06-27 18:03:43,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7192, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8338, PETRI_PLACES=359, PETRI_TRANSITIONS=494} [2024-06-27 18:03:43,683 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 328 predicate places. [2024-06-27 18:03:43,683 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 494 transitions, 8338 flow [2024-06-27 18:03:43,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.73913043478261) internal successors, (224), 23 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:43,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:43,684 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:43,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:43,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-06-27 18:03:43,885 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:43,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:43,885 INFO L85 PathProgramCache]: Analyzing trace with hash 624862460, now seen corresponding path program 13 times [2024-06-27 18:03:43,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:43,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966235754] [2024-06-27 18:03:43,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:43,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:44,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:44,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966235754] [2024-06-27 18:03:44,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966235754] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:44,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898874055] [2024-06-27 18:03:44,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:03:44,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:44,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:44,209 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:44,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-06-27 18:03:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:44,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 18:03:44,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:44,441 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 18:03:44,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2024-06-27 18:03:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:44,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:44,510 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:03:44,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:03:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 18:03:44,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898874055] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:44,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:44,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 19 [2024-06-27 18:03:44,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116144261] [2024-06-27 18:03:44,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:44,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 18:03:44,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:44,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 18:03:44,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-06-27 18:03:44,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:44,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 494 transitions, 8338 flow. Second operand has 20 states, 20 states have (on average 10.15) internal successors, (203), 20 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:44,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:44,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:44,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:46,596 INFO L124 PetriNetUnfolderBase]: 3861/6870 cut-off events. [2024-06-27 18:03:46,596 INFO L125 PetriNetUnfolderBase]: For 114600/114600 co-relation queries the response was YES. [2024-06-27 18:03:46,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44819 conditions, 6870 events. 3861/6870 cut-off events. For 114600/114600 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 47575 event pairs, 976 based on Foata normal form. 10/6879 useless extension candidates. Maximal degree in co-relation 44705. Up to 6004 conditions per place. [2024-06-27 18:03:46,663 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 443 selfloop transitions, 80 changer transitions 14/542 dead transitions. [2024-06-27 18:03:46,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 542 transitions, 9633 flow [2024-06-27 18:03:46,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 18:03:46,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 18:03:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 226 transitions. [2024-06-27 18:03:46,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028520499108734 [2024-06-27 18:03:46,664 INFO L175 Difference]: Start difference. First operand has 359 places, 494 transitions, 8338 flow. Second operand 17 states and 226 transitions. [2024-06-27 18:03:46,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 542 transitions, 9633 flow [2024-06-27 18:03:47,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 542 transitions, 9207 flow, removed 121 selfloop flow, removed 20 redundant places. [2024-06-27 18:03:47,312 INFO L231 Difference]: Finished difference. Result has 357 places, 494 transitions, 8111 flow [2024-06-27 18:03:47,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7919, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8111, PETRI_PLACES=357, PETRI_TRANSITIONS=494} [2024-06-27 18:03:47,315 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 326 predicate places. [2024-06-27 18:03:47,315 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 494 transitions, 8111 flow [2024-06-27 18:03:47,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.15) internal successors, (203), 20 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:47,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:47,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:47,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:47,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-06-27 18:03:47,531 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:47,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:47,532 INFO L85 PathProgramCache]: Analyzing trace with hash -110354244, now seen corresponding path program 14 times [2024-06-27 18:03:47,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:47,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689591975] [2024-06-27 18:03:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:47,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:47,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:47,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689591975] [2024-06-27 18:03:47,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689591975] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:47,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118535662] [2024-06-27 18:03:47,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:03:47,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:47,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:47,967 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:47,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-06-27 18:03:48,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:03:48,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:48,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 18:03:48,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:48,239 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:48,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 18:03:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:03:48,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:48,328 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:03:48,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:03:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 18:03:48,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118535662] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:48,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:48,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 20 [2024-06-27 18:03:48,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214791277] [2024-06-27 18:03:48,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:48,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:03:48,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:48,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:03:48,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:03:48,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:48,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 494 transitions, 8111 flow. Second operand has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 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) [2024-06-27 18:03:48,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:48,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:48,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:50,423 INFO L124 PetriNetUnfolderBase]: 3903/6973 cut-off events. [2024-06-27 18:03:50,423 INFO L125 PetriNetUnfolderBase]: For 109531/109531 co-relation queries the response was YES. [2024-06-27 18:03:50,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44261 conditions, 6973 events. 3903/6973 cut-off events. For 109531/109531 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 48672 event pairs, 832 based on Foata normal form. 30/7002 useless extension candidates. Maximal degree in co-relation 44148. Up to 5679 conditions per place. [2024-06-27 18:03:50,486 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 475 selfloop transitions, 104 changer transitions 10/594 dead transitions. [2024-06-27 18:03:50,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 594 transitions, 10025 flow [2024-06-27 18:03:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 18:03:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 18:03:50,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 339 transitions. [2024-06-27 18:03:50,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4109090909090909 [2024-06-27 18:03:50,487 INFO L175 Difference]: Start difference. First operand has 357 places, 494 transitions, 8111 flow. Second operand 25 states and 339 transitions. [2024-06-27 18:03:50,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 594 transitions, 10025 flow [2024-06-27 18:03:51,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 594 transitions, 9814 flow, removed 3 selfloop flow, removed 17 redundant places. [2024-06-27 18:03:51,028 INFO L231 Difference]: Finished difference. Result has 366 places, 506 transitions, 8467 flow [2024-06-27 18:03:51,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7860, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8467, PETRI_PLACES=366, PETRI_TRANSITIONS=506} [2024-06-27 18:03:51,029 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 335 predicate places. [2024-06-27 18:03:51,029 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 506 transitions, 8467 flow [2024-06-27 18:03:51,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 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) [2024-06-27 18:03:51,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:51,029 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:51,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:51,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-06-27 18:03:51,230 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:51,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:51,230 INFO L85 PathProgramCache]: Analyzing trace with hash 2011973948, now seen corresponding path program 15 times [2024-06-27 18:03:51,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:51,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370511757] [2024-06-27 18:03:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:51,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:51,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:51,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370511757] [2024-06-27 18:03:51,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370511757] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:51,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111805037] [2024-06-27 18:03:51,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:03:51,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:51,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:51,651 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:51,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-06-27 18:03:51,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 18:03:51,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:51,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 18:03:51,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:51,973 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:51,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 18:03:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:03:51,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:52,046 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:03:52,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:03:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 18:03:52,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111805037] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:52,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:52,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 20 [2024-06-27 18:03:52,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228094498] [2024-06-27 18:03:52,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:52,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:03:52,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:52,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:03:52,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:03:52,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:52,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 506 transitions, 8467 flow. Second operand has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 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) [2024-06-27 18:03:52,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:52,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:52,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:54,042 INFO L124 PetriNetUnfolderBase]: 3607/6391 cut-off events. [2024-06-27 18:03:54,042 INFO L125 PetriNetUnfolderBase]: For 105800/105800 co-relation queries the response was YES. [2024-06-27 18:03:54,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41268 conditions, 6391 events. 3607/6391 cut-off events. For 105800/105800 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 43344 event pairs, 836 based on Foata normal form. 60/6450 useless extension candidates. Maximal degree in co-relation 41156. Up to 5679 conditions per place. [2024-06-27 18:03:54,098 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 444 selfloop transitions, 91 changer transitions 2/542 dead transitions. [2024-06-27 18:03:54,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 542 transitions, 9561 flow [2024-06-27 18:03:54,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 18:03:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 18:03:54,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 245 transitions. [2024-06-27 18:03:54,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39074960127591707 [2024-06-27 18:03:54,100 INFO L175 Difference]: Start difference. First operand has 366 places, 506 transitions, 8467 flow. Second operand 19 states and 245 transitions. [2024-06-27 18:03:54,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 542 transitions, 9561 flow [2024-06-27 18:03:54,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 542 transitions, 9233 flow, removed 66 selfloop flow, removed 23 redundant places. [2024-06-27 18:03:54,740 INFO L231 Difference]: Finished difference. Result has 356 places, 495 transitions, 8090 flow [2024-06-27 18:03:54,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7905, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8090, PETRI_PLACES=356, PETRI_TRANSITIONS=495} [2024-06-27 18:03:54,741 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 325 predicate places. [2024-06-27 18:03:54,741 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 495 transitions, 8090 flow [2024-06-27 18:03:54,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 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) [2024-06-27 18:03:54,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:54,742 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:54,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:54,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:54,943 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:54,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:54,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1578667959, now seen corresponding path program 9 times [2024-06-27 18:03:54,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:54,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881610083] [2024-06-27 18:03:54,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:54,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 18:03:55,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:55,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881610083] [2024-06-27 18:03:55,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881610083] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:55,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115090675] [2024-06-27 18:03:55,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:03:55,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:55,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:55,008 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:55,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-06-27 18:03:55,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 18:03:55,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:55,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 20 conjunts are in the unsatisfiable core [2024-06-27 18:03:55,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:55,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:55,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115090675] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:55,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:55,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 14] total 30 [2024-06-27 18:03:55,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296868762] [2024-06-27 18:03:55,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:56,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 18:03:56,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:56,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 18:03:56,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2024-06-27 18:03:56,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:56,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 495 transitions, 8090 flow. Second operand has 31 states, 31 states have (on average 9.451612903225806) internal successors, (293), 31 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:56,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:56,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:56,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:59,864 INFO L124 PetriNetUnfolderBase]: 7424/13439 cut-off events. [2024-06-27 18:03:59,865 INFO L125 PetriNetUnfolderBase]: For 266413/266418 co-relation queries the response was YES. [2024-06-27 18:03:59,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88889 conditions, 13439 events. 7424/13439 cut-off events. For 266413/266418 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 104000 event pairs, 688 based on Foata normal form. 342/13779 useless extension candidates. Maximal degree in co-relation 88785. Up to 4022 conditions per place. [2024-06-27 18:04:00,014 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 452 selfloop transitions, 576 changer transitions 51/1084 dead transitions. [2024-06-27 18:04:00,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 1084 transitions, 19036 flow [2024-06-27 18:04:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 18:04:00,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 18:04:00,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 520 transitions. [2024-06-27 18:04:00,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-27 18:04:00,015 INFO L175 Difference]: Start difference. First operand has 356 places, 495 transitions, 8090 flow. Second operand 35 states and 520 transitions. [2024-06-27 18:04:00,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 1084 transitions, 19036 flow [2024-06-27 18:04:01,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1084 transitions, 18668 flow, removed 12 selfloop flow, removed 19 redundant places. [2024-06-27 18:04:01,604 INFO L231 Difference]: Finished difference. Result has 390 places, 816 transitions, 16195 flow [2024-06-27 18:04:01,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7883, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=16195, PETRI_PLACES=390, PETRI_TRANSITIONS=816} [2024-06-27 18:04:01,605 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 359 predicate places. [2024-06-27 18:04:01,605 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 816 transitions, 16195 flow [2024-06-27 18:04:01,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 9.451612903225806) internal successors, (293), 31 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:01,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:01,606 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:01,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-06-27 18:04:01,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-06-27 18:04:01,806 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:01,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:01,807 INFO L85 PathProgramCache]: Analyzing trace with hash -417844537, now seen corresponding path program 10 times [2024-06-27 18:04:01,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:01,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513094977] [2024-06-27 18:04:01,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:01,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 18:04:01,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:01,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513094977] [2024-06-27 18:04:01,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513094977] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:01,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732737390] [2024-06-27 18:04:01,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:04:01,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:01,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:01,966 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:04:01,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-06-27 18:04:02,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:04:02,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:02,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 18:04:02,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-06-27 18:04:02,212 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 18:04:02,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732737390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:02,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 18:04:02,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2024-06-27 18:04:02,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334826111] [2024-06-27 18:04:02,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:02,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:04:02,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:02,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:04:02,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:04:02,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-27 18:04:02,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 816 transitions, 16195 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:02,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:02,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-27 18:04:02,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand