./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/popl20-bad-buffer-mult-alt2.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c ./goblint.2024-06-19_11-23-25.files/protection/popl20-bad-buffer-mult-alt2.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 18:02:31,105 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:02:31,176 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:02:31,181 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:02:31,182 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:02:31,206 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:02:31,207 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:02:31,207 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:02:31,208 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:02:31,212 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:02:31,212 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:02:31,212 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:02:31,213 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:02:31,214 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:02:31,215 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:02:31,215 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:02:31,215 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:02:31,215 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:02:31,215 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:02:31,216 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:02:31,216 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:02:31,216 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:02:31,217 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:02:31,217 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:02:31,217 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:02:31,217 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:02:31,217 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:02:31,218 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:02:31,218 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:02:31,218 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:02:31,219 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:02:31,219 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:02:31,220 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:02:31,220 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:02:31,220 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:02:31,220 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:02:31,221 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:02:31,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:02:31,221 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:02:31,221 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:02:31,221 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:02:31,222 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:02:31,222 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:02:31,222 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:02:31,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:02:31,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:02:31,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:02:31,499 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:02:31,500 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:02:31,501 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/popl20-bad-buffer-mult-alt2.wvr.yml/witness.yml [2024-06-27 18:02:31,623 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:02:31,624 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:02:31,626 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-06-27 18:02:32,736 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:02:32,930 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:02:32,931 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-06-27 18:02:32,938 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f290e2c0f/7e048ed3162d4b02891a9cc60c35d4ed/FLAG51db31e35 [2024-06-27 18:02:32,950 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f290e2c0f/7e048ed3162d4b02891a9cc60c35d4ed [2024-06-27 18:02:32,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:02:32,952 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:02:32,955 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:02:32,956 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:02:32,960 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:02:32,961 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:02:31" (1/2) ... [2024-06-27 18:02:32,962 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@299b9891 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:02:32, skipping insertion in model container [2024-06-27 18:02:32,962 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:02:31" (1/2) ... [2024-06-27 18:02:32,964 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@72a00e76 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:02:32, skipping insertion in model container [2024-06-27 18:02:32,964 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:02:32" (2/2) ... [2024-06-27 18:02:32,964 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@299b9891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:32, skipping insertion in model container [2024-06-27 18:02:32,965 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:02:32" (2/2) ... [2024-06-27 18:02:32,965 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:02:32,990 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:02:32,994 INFO L97 edCorrectnessWitness]: Location invariant before [L143-L143] (! multithreaded || 0 <= j) && (! multithreaded || 0 <= i) [2024-06-27 18:02:32,995 INFO L97 edCorrectnessWitness]: Location invariant before [L142-L142] (! multithreaded || 0 <= j) && (! multithreaded || 0 <= i) [2024-06-27 18:02:32,995 INFO L97 edCorrectnessWitness]: Location invariant before [L144-L144] (! multithreaded || 0 <= j) && (! multithreaded || 0 <= i) [2024-06-27 18:02:32,995 INFO L97 edCorrectnessWitness]: Location invariant before [L141-L141] (! multithreaded || 0 <= j) && (! multithreaded || 0 <= i) [2024-06-27 18:02:32,995 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:02:32,995 INFO L106 edCorrectnessWitness]: ghost_update [L140-L140] multithreaded = 1; [2024-06-27 18:02:33,018 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:02:33,218 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2024-06-27 18:02:33,248 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:02:33,258 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:02:33,345 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2024-06-27 18:02:33,350 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:02:33,375 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:02:33,376 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:33 WrapperNode [2024-06-27 18:02:33,377 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:02:33,378 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:02:33,379 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:02:33,379 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:02:33,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:33" (1/1) ... [2024-06-27 18:02:33,408 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:33" (1/1) ... [2024-06-27 18:02:33,457 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 314 [2024-06-27 18:02:33,460 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:02:33,461 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:02:33,462 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:02:33,463 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:02:33,474 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:33" (1/1) ... [2024-06-27 18:02:33,475 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:33" (1/1) ... [2024-06-27 18:02:33,489 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:33" (1/1) ... [2024-06-27 18:02:33,515 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 18:02:33,521 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:33" (1/1) ... [2024-06-27 18:02:33,521 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:33" (1/1) ... [2024-06-27 18:02:33,549 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:33" (1/1) ... [2024-06-27 18:02:33,552 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:33" (1/1) ... [2024-06-27 18:02:33,554 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:33" (1/1) ... [2024-06-27 18:02:33,556 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:33" (1/1) ... [2024-06-27 18:02:33,558 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:02:33,559 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:02:33,560 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:02:33,560 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:02:33,561 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:33" (1/1) ... [2024-06-27 18:02:33,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:02:33,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:33,620 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 18:02:33,622 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 18:02:33,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:02:33,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 18:02:33,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 18:02:33,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 18:02:33,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 18:02:33,657 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 18:02:33,657 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 18:02:33,657 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-06-27 18:02:33,657 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-06-27 18:02:33,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:02:33,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:02:33,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:02:33,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:02:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:02:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:02:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 18:02:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:02:33,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:02:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:02:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:02:33,660 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 18:02:33,757 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:02:33,759 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:02:34,149 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:02:34,149 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:02:34,487 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:02:34,487 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-06-27 18:02:34,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:02:34 BoogieIcfgContainer [2024-06-27 18:02:34,490 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:02:34,492 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:02:34,492 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:02:34,495 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:02:34,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:02:31" (1/4) ... [2024-06-27 18:02:34,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584738b2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:02:34, skipping insertion in model container [2024-06-27 18:02:34,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:02:32" (2/4) ... [2024-06-27 18:02:34,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584738b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:02:34, skipping insertion in model container [2024-06-27 18:02:34,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:33" (3/4) ... [2024-06-27 18:02:34,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584738b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:02:34, skipping insertion in model container [2024-06-27 18:02:34,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:02:34" (4/4) ... [2024-06-27 18:02:34,498 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2024-06-27 18:02:34,513 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:02:34,514 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 18:02:34,514 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:02:34,561 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-06-27 18:02:34,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 57 transitions, 142 flow [2024-06-27 18:02:34,607 INFO L124 PetriNetUnfolderBase]: 6/53 cut-off events. [2024-06-27 18:02:34,608 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 18:02:34,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 53 events. 6/53 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-27 18:02:34,611 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 57 transitions, 142 flow [2024-06-27 18:02:34,613 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 52 transitions, 128 flow [2024-06-27 18:02:34,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:02:34,625 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;@516d090b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:02:34,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 18:02:34,629 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:02:34,629 INFO L124 PetriNetUnfolderBase]: 2/9 cut-off events. [2024-06-27 18:02:34,629 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:02:34,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:34,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:34,630 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:02:34,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:34,634 INFO L85 PathProgramCache]: Analyzing trace with hash 789014497, now seen corresponding path program 1 times [2024-06-27 18:02:34,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:34,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222656857] [2024-06-27 18:02:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:34,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:02:35,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:35,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222656857] [2024-06-27 18:02:35,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222656857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:35,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:35,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:02:35,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986353000] [2024-06-27 18:02:35,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:35,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:02:35,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:35,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:02:35,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:02:35,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 57 [2024-06-27 18:02:35,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 18:02:35,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:35,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 57 [2024-06-27 18:02:35,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:35,558 INFO L124 PetriNetUnfolderBase]: 1245/2106 cut-off events. [2024-06-27 18:02:35,559 INFO L125 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2024-06-27 18:02:35,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 2106 events. 1245/2106 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 13759 event pairs, 448 based on Foata normal form. 54/2011 useless extension candidates. Maximal degree in co-relation 3515. Up to 1117 conditions per place. [2024-06-27 18:02:35,579 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 54 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-06-27 18:02:35,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 75 transitions, 307 flow [2024-06-27 18:02:35,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:02:35,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:02:35,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-06-27 18:02:35,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7543859649122807 [2024-06-27 18:02:35,593 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 128 flow. Second operand 3 states and 129 transitions. [2024-06-27 18:02:35,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 75 transitions, 307 flow [2024-06-27 18:02:35,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 277 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:02:35,604 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 130 flow [2024-06-27 18:02:35,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2024-06-27 18:02:35,608 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2024-06-27 18:02:35,609 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 130 flow [2024-06-27 18:02:35,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 18:02:35,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:35,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:35,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:02:35,610 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:02:35,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:35,610 INFO L85 PathProgramCache]: Analyzing trace with hash 230304958, now seen corresponding path program 1 times [2024-06-27 18:02:35,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:35,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779537691] [2024-06-27 18:02:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:35,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:35,719 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 18:02:35,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:35,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779537691] [2024-06-27 18:02:35,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779537691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:35,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:35,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:02:35,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964961357] [2024-06-27 18:02:35,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:35,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:02:35,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:35,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:02:35,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:02:35,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 57 [2024-06-27 18:02:35,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:35,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:35,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 57 [2024-06-27 18:02:35,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:36,001 INFO L124 PetriNetUnfolderBase]: 1029/1810 cut-off events. [2024-06-27 18:02:36,002 INFO L125 PetriNetUnfolderBase]: For 253/253 co-relation queries the response was YES. [2024-06-27 18:02:36,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3607 conditions, 1810 events. 1029/1810 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11665 event pairs, 408 based on Foata normal form. 80/1807 useless extension candidates. Maximal degree in co-relation 1468. Up to 820 conditions per place. [2024-06-27 18:02:36,014 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 50 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-06-27 18:02:36,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 71 transitions, 269 flow [2024-06-27 18:02:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:02:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:02:36,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 148 transitions. [2024-06-27 18:02:36,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6491228070175439 [2024-06-27 18:02:36,023 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 130 flow. Second operand 4 states and 148 transitions. [2024-06-27 18:02:36,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 71 transitions, 269 flow [2024-06-27 18:02:36,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 71 transitions, 267 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:02:36,026 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 116 flow [2024-06-27 18:02:36,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2024-06-27 18:02:36,031 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2024-06-27 18:02:36,031 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 116 flow [2024-06-27 18:02:36,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:36,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:36,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:36,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:02:36,032 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:02:36,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:36,032 INFO L85 PathProgramCache]: Analyzing trace with hash 531573888, now seen corresponding path program 1 times [2024-06-27 18:02:36,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:36,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797719664] [2024-06-27 18:02:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:36,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:36,237 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 18:02:36,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:36,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797719664] [2024-06-27 18:02:36,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797719664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:36,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:36,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:02:36,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588033317] [2024-06-27 18:02:36,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:36,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:02:36,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:36,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:02:36,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:02:36,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 57 [2024-06-27 18:02:36,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 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 18:02:36,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:36,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 57 [2024-06-27 18:02:36,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:36,514 INFO L124 PetriNetUnfolderBase]: 1164/1928 cut-off events. [2024-06-27 18:02:36,515 INFO L125 PetriNetUnfolderBase]: For 372/372 co-relation queries the response was YES. [2024-06-27 18:02:36,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3939 conditions, 1928 events. 1164/1928 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 12209 event pairs, 124 based on Foata normal form. 93/1967 useless extension candidates. Maximal degree in co-relation 1261. Up to 1130 conditions per place. [2024-06-27 18:02:36,531 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 60 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2024-06-27 18:02:36,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 81 transitions, 314 flow [2024-06-27 18:02:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:02:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:02:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2024-06-27 18:02:36,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 18:02:36,533 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 116 flow. Second operand 5 states and 190 transitions. [2024-06-27 18:02:36,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 81 transitions, 314 flow [2024-06-27 18:02:36,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 81 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:02:36,536 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 125 flow [2024-06-27 18:02:36,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=125, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-27 18:02:36,537 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2024-06-27 18:02:36,537 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 125 flow [2024-06-27 18:02:36,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 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 18:02:36,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:36,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:36,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:02:36,538 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:02:36,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:36,539 INFO L85 PathProgramCache]: Analyzing trace with hash 279969893, now seen corresponding path program 1 times [2024-06-27 18:02:36,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:36,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381743145] [2024-06-27 18:02:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:36,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:36,732 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 18:02:36,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:36,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381743145] [2024-06-27 18:02:36,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381743145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:36,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:36,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:02:36,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162478489] [2024-06-27 18:02:36,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:36,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:02:36,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:36,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:02:36,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:02:36,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 18:02:36,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:36,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:36,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 18:02:36,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:36,909 INFO L124 PetriNetUnfolderBase]: 842/1491 cut-off events. [2024-06-27 18:02:36,910 INFO L125 PetriNetUnfolderBase]: For 692/846 co-relation queries the response was YES. [2024-06-27 18:02:36,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3299 conditions, 1491 events. 842/1491 cut-off events. For 692/846 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9298 event pairs, 700 based on Foata normal form. 235/1606 useless extension candidates. Maximal degree in co-relation 1827. Up to 1043 conditions per place. [2024-06-27 18:02:36,921 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 29 selfloop transitions, 2 changer transitions 19/69 dead transitions. [2024-06-27 18:02:36,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 69 transitions, 271 flow [2024-06-27 18:02:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:02:36,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:02:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 159 transitions. [2024-06-27 18:02:36,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6973684210526315 [2024-06-27 18:02:36,923 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 125 flow. Second operand 4 states and 159 transitions. [2024-06-27 18:02:36,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 69 transitions, 271 flow [2024-06-27 18:02:36,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 261 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 18:02:36,925 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 133 flow [2024-06-27 18:02:36,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-27 18:02:36,927 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -3 predicate places. [2024-06-27 18:02:36,927 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 133 flow [2024-06-27 18:02:36,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:36,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:36,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:36,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:02:36,928 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:02:36,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:36,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1311026710, now seen corresponding path program 1 times [2024-06-27 18:02:36,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:36,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095359120] [2024-06-27 18:02:36,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:36,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:02:37,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:37,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095359120] [2024-06-27 18:02:37,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095359120] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:37,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876258579] [2024-06-27 18:02:37,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:37,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:37,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:37,160 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 18:02:37,176 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 18:02:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:37,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 18:02:37,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:02:37,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:37,624 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 18:02:37,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876258579] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:37,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 18:02:37,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 7] total 15 [2024-06-27 18:02:37,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651099317] [2024-06-27 18:02:37,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:37,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:02:37,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:37,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:02:37,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-06-27 18:02:37,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-06-27 18:02:37,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 133 flow. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 0 states have call successors, (0), 0 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 18:02:37,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:37,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-06-27 18:02:37,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:38,256 INFO L124 PetriNetUnfolderBase]: 4550/6515 cut-off events. [2024-06-27 18:02:38,257 INFO L125 PetriNetUnfolderBase]: For 915/915 co-relation queries the response was YES. [2024-06-27 18:02:38,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14562 conditions, 6515 events. 4550/6515 cut-off events. For 915/915 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 40080 event pairs, 997 based on Foata normal form. 0/5886 useless extension candidates. Maximal degree in co-relation 14548. Up to 1762 conditions per place. [2024-06-27 18:02:38,295 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 86 selfloop transitions, 10 changer transitions 0/109 dead transitions. [2024-06-27 18:02:38,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 109 transitions, 478 flow [2024-06-27 18:02:38,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:02:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:02:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 220 transitions. [2024-06-27 18:02:38,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432748538011696 [2024-06-27 18:02:38,297 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 133 flow. Second operand 6 states and 220 transitions. [2024-06-27 18:02:38,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 109 transitions, 478 flow [2024-06-27 18:02:38,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 109 transitions, 474 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 18:02:38,302 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 210 flow [2024-06-27 18:02:38,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-27 18:02:38,304 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 4 predicate places. [2024-06-27 18:02:38,304 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 210 flow [2024-06-27 18:02:38,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 0 states have call successors, (0), 0 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 18:02:38,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:38,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:38,322 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 18:02:38,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:38,514 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:02:38,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:38,514 INFO L85 PathProgramCache]: Analyzing trace with hash 899718528, now seen corresponding path program 2 times [2024-06-27 18:02:38,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:38,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863684715] [2024-06-27 18:02:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:38,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:38,699 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 18:02:38,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:38,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863684715] [2024-06-27 18:02:38,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863684715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:38,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:38,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:02:38,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018223315] [2024-06-27 18:02:38,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:38,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:02:38,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:38,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:02:38,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:02:38,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 57 [2024-06-27 18:02:38,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 18:02:38,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:38,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 57 [2024-06-27 18:02:38,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:39,250 INFO L124 PetriNetUnfolderBase]: 2884/4428 cut-off events. [2024-06-27 18:02:39,251 INFO L125 PetriNetUnfolderBase]: For 5554/5791 co-relation queries the response was YES. [2024-06-27 18:02:39,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12982 conditions, 4428 events. 2884/4428 cut-off events. For 5554/5791 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 27397 event pairs, 289 based on Foata normal form. 264/4644 useless extension candidates. Maximal degree in co-relation 12960. Up to 2605 conditions per place. [2024-06-27 18:02:39,288 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 73 selfloop transitions, 9 changer transitions 0/101 dead transitions. [2024-06-27 18:02:39,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 101 transitions, 537 flow [2024-06-27 18:02:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:02:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:02:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2024-06-27 18:02:39,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.652046783625731 [2024-06-27 18:02:39,289 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 210 flow. Second operand 6 states and 223 transitions. [2024-06-27 18:02:39,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 101 transitions, 537 flow [2024-06-27 18:02:39,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 526 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 18:02:39,296 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 294 flow [2024-06-27 18:02:39,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2024-06-27 18:02:39,298 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2024-06-27 18:02:39,299 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 294 flow [2024-06-27 18:02:39,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 18:02:39,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:39,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:39,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:02:39,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:02:39,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:39,300 INFO L85 PathProgramCache]: Analyzing trace with hash 143221361, now seen corresponding path program 1 times [2024-06-27 18:02:39,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:39,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158578548] [2024-06-27 18:02:39,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:39,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:02:39,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:39,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158578548] [2024-06-27 18:02:39,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158578548] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:39,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382566790] [2024-06-27 18:02:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:39,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:39,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:39,962 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 18:02:39,980 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 18:02:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:40,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 20 conjunts are in the unsatisfiable core [2024-06-27 18:02:40,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:40,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 18:02:40,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 18:02:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:02:40,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:40,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-06-27 18:02:40,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2024-06-27 18:02:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:02:40,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382566790] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:40,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:40,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-06-27 18:02:40,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169197795] [2024-06-27 18:02:40,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:40,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 18:02:40,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:40,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 18:02:40,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-06-27 18:02:40,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 18:02:40,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 294 flow. Second operand has 18 states, 18 states have (on average 30.666666666666668) internal successors, (552), 18 states have internal predecessors, (552), 0 states have call successors, (0), 0 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 18:02:40,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:40,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 18:02:40,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:44,058 INFO L124 PetriNetUnfolderBase]: 9585/16150 cut-off events. [2024-06-27 18:02:44,059 INFO L125 PetriNetUnfolderBase]: For 29422/30553 co-relation queries the response was YES. [2024-06-27 18:02:44,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46701 conditions, 16150 events. 9585/16150 cut-off events. For 29422/30553 co-relation queries the response was YES. Maximal size of possible extension queue 966. Compared 131594 event pairs, 939 based on Foata normal form. 973/16617 useless extension candidates. Maximal degree in co-relation 29411. Up to 4322 conditions per place. [2024-06-27 18:02:44,203 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 233 selfloop transitions, 53 changer transitions 3/314 dead transitions. [2024-06-27 18:02:44,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 314 transitions, 1813 flow [2024-06-27 18:02:44,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 18:02:44,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 18:02:44,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 863 transitions. [2024-06-27 18:02:44,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6881977671451356 [2024-06-27 18:02:44,207 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 294 flow. Second operand 22 states and 863 transitions. [2024-06-27 18:02:44,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 314 transitions, 1813 flow [2024-06-27 18:02:44,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 314 transitions, 1774 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 18:02:44,242 INFO L231 Difference]: Finished difference. Result has 94 places, 117 transitions, 779 flow [2024-06-27 18:02:44,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=779, PETRI_PLACES=94, PETRI_TRANSITIONS=117} [2024-06-27 18:02:44,243 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 35 predicate places. [2024-06-27 18:02:44,243 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 117 transitions, 779 flow [2024-06-27 18:02:44,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 30.666666666666668) internal successors, (552), 18 states have internal predecessors, (552), 0 states have call successors, (0), 0 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 18:02:44,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:44,244 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:44,274 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 18:02:44,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-06-27 18:02:44,453 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:02:44,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:44,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1887161422, now seen corresponding path program 2 times [2024-06-27 18:02:44,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:44,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186050269] [2024-06-27 18:02:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:44,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:02:44,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:44,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186050269] [2024-06-27 18:02:44,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186050269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:44,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:44,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:02:44,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902894940] [2024-06-27 18:02:44,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:44,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:02:44,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:44,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:02:44,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:02:44,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 18:02:44,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 117 transitions, 779 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:02:44,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:44,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 18:02:44,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:46,219 INFO L124 PetriNetUnfolderBase]: 9233/15502 cut-off events. [2024-06-27 18:02:46,220 INFO L125 PetriNetUnfolderBase]: For 39215/40171 co-relation queries the response was YES. [2024-06-27 18:02:46,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49030 conditions, 15502 events. 9233/15502 cut-off events. For 39215/40171 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 125726 event pairs, 1117 based on Foata normal form. 490/15531 useless extension candidates. Maximal degree in co-relation 42301. Up to 11741 conditions per place. [2024-06-27 18:02:46,321 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 80 selfloop transitions, 21 changer transitions 0/126 dead transitions. [2024-06-27 18:02:46,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 126 transitions, 966 flow [2024-06-27 18:02:46,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:02:46,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:02:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-06-27 18:02:46,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7368421052631579 [2024-06-27 18:02:46,322 INFO L175 Difference]: Start difference. First operand has 94 places, 117 transitions, 779 flow. Second operand 3 states and 126 transitions. [2024-06-27 18:02:46,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 126 transitions, 966 flow [2024-06-27 18:02:46,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 126 transitions, 920 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 18:02:46,373 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 727 flow [2024-06-27 18:02:46,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=727, PETRI_PLACES=93, PETRI_TRANSITIONS=112} [2024-06-27 18:02:46,375 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 34 predicate places. [2024-06-27 18:02:46,375 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 727 flow [2024-06-27 18:02:46,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:02:46,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:46,375 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:46,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:02:46,376 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:02:46,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1280228798, now seen corresponding path program 1 times [2024-06-27 18:02:46,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:46,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650510910] [2024-06-27 18:02:46,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:46,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:02:47,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:47,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650510910] [2024-06-27 18:02:47,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650510910] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:47,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996992604] [2024-06-27 18:02:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:47,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:47,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:47,147 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 18:02:47,176 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 18:02:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:47,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 18:02:47,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:47,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-06-27 18:02:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:02:47,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:47,471 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:02:47,472 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 18 [2024-06-27 18:02:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:02:47,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996992604] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:47,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:47,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 15 [2024-06-27 18:02:47,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389650030] [2024-06-27 18:02:47,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:47,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 18:02:47,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:47,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 18:02:47,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-06-27 18:02:47,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 18:02:47,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 727 flow. Second operand has 16 states, 16 states have (on average 31.125) internal successors, (498), 16 states have internal predecessors, (498), 0 states have call successors, (0), 0 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 18:02:47,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:47,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 18:02:47,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:50,020 INFO L124 PetriNetUnfolderBase]: 11923/20057 cut-off events. [2024-06-27 18:02:50,020 INFO L125 PetriNetUnfolderBase]: For 47936/48812 co-relation queries the response was YES. [2024-06-27 18:02:50,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63325 conditions, 20057 events. 11923/20057 cut-off events. For 47936/48812 co-relation queries the response was YES. Maximal size of possible extension queue 1184. Compared 168600 event pairs, 823 based on Foata normal form. 698/20132 useless extension candidates. Maximal degree in co-relation 52188. Up to 6691 conditions per place. [2024-06-27 18:02:50,203 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 117 selfloop transitions, 65 changer transitions 1/208 dead transitions. [2024-06-27 18:02:50,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 208 transitions, 1530 flow [2024-06-27 18:02:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:02:50,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:02:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 498 transitions. [2024-06-27 18:02:50,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6240601503759399 [2024-06-27 18:02:50,206 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 727 flow. Second operand 14 states and 498 transitions. [2024-06-27 18:02:50,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 208 transitions, 1530 flow [2024-06-27 18:02:50,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 208 transitions, 1472 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:02:50,264 INFO L231 Difference]: Finished difference. Result has 106 places, 136 transitions, 1066 flow [2024-06-27 18:02:50,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1066, PETRI_PLACES=106, PETRI_TRANSITIONS=136} [2024-06-27 18:02:50,265 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 47 predicate places. [2024-06-27 18:02:50,265 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 136 transitions, 1066 flow [2024-06-27 18:02:50,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 31.125) internal successors, (498), 16 states have internal predecessors, (498), 0 states have call successors, (0), 0 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 18:02:50,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:50,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:50,292 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 18:02:50,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:50,484 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:02:50,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:50,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2075647450, now seen corresponding path program 1 times [2024-06-27 18:02:50,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:50,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56153952] [2024-06-27 18:02:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:50,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:50,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:50,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56153952] [2024-06-27 18:02:50,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56153952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:50,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:50,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:02:50,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050643686] [2024-06-27 18:02:50,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:50,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:02:50,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:50,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:02:50,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:02:50,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 18:02:50,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 136 transitions, 1066 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 18:02:50,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:50,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 18:02:50,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:53,237 INFO L124 PetriNetUnfolderBase]: 15755/25998 cut-off events. [2024-06-27 18:02:53,237 INFO L125 PetriNetUnfolderBase]: For 94551/97226 co-relation queries the response was YES. [2024-06-27 18:02:53,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83815 conditions, 25998 events. 15755/25998 cut-off events. For 94551/97226 co-relation queries the response was YES. Maximal size of possible extension queue 1358. Compared 217580 event pairs, 4409 based on Foata normal form. 1882/26794 useless extension candidates. Maximal degree in co-relation 75219. Up to 13536 conditions per place. [2024-06-27 18:02:53,411 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 154 selfloop transitions, 9 changer transitions 0/188 dead transitions. [2024-06-27 18:02:53,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 188 transitions, 1936 flow [2024-06-27 18:02:53,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:02:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:02:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-06-27 18:02:53,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7602339181286549 [2024-06-27 18:02:53,413 INFO L175 Difference]: Start difference. First operand has 106 places, 136 transitions, 1066 flow. Second operand 3 states and 130 transitions. [2024-06-27 18:02:53,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 188 transitions, 1936 flow [2024-06-27 18:02:53,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 188 transitions, 1904 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 18:02:53,473 INFO L231 Difference]: Finished difference. Result has 106 places, 137 transitions, 1105 flow [2024-06-27 18:02:53,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1105, PETRI_PLACES=106, PETRI_TRANSITIONS=137} [2024-06-27 18:02:53,474 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 47 predicate places. [2024-06-27 18:02:53,474 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 137 transitions, 1105 flow [2024-06-27 18:02:53,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 18:02:53,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:53,474 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:53,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:02:53,474 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:02:53,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:53,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1305571301, now seen corresponding path program 3 times [2024-06-27 18:02:53,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:53,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177593883] [2024-06-27 18:02:53,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:53,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:53,563 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 18:02:53,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:53,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177593883] [2024-06-27 18:02:53,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177593883] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:53,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079434970] [2024-06-27 18:02:53,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:02:53,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:53,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:53,565 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 18:02:53,587 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 18:02:53,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 18:02:53,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:53,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-27 18:02:53,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:53,726 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 18:02:53,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:02:53,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079434970] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:53,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:53,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2024-06-27 18:02:53,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271165244] [2024-06-27 18:02:53,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:53,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:02:53,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:02:53,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:02:53,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 18:02:53,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 137 transitions, 1105 flow. Second operand has 8 states, 8 states have (on average 32.375) internal successors, (259), 8 states have internal predecessors, (259), 0 states have call successors, (0), 0 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 18:02:53,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:53,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 18:02:53,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:59,146 INFO L124 PetriNetUnfolderBase]: 28879/48044 cut-off events. [2024-06-27 18:02:59,146 INFO L125 PetriNetUnfolderBase]: For 143205/146361 co-relation queries the response was YES. [2024-06-27 18:02:59,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156098 conditions, 48044 events. 28879/48044 cut-off events. For 143205/146361 co-relation queries the response was YES. Maximal size of possible extension queue 2398. Compared 440557 event pairs, 3531 based on Foata normal form. 1811/48448 useless extension candidates. Maximal degree in co-relation 156050. Up to 20271 conditions per place. [2024-06-27 18:02:59,561 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 148 selfloop transitions, 48 changer transitions 0/221 dead transitions. [2024-06-27 18:02:59,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 221 transitions, 2022 flow [2024-06-27 18:02:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:02:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:02:59,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 183 transitions. [2024-06-27 18:02:59,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8026315789473685 [2024-06-27 18:02:59,562 INFO L175 Difference]: Start difference. First operand has 106 places, 137 transitions, 1105 flow. Second operand 4 states and 183 transitions. [2024-06-27 18:02:59,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 221 transitions, 2022 flow [2024-06-27 18:02:59,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 221 transitions, 2011 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:02:59,908 INFO L231 Difference]: Finished difference. Result has 110 places, 156 transitions, 1523 flow [2024-06-27 18:02:59,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1523, PETRI_PLACES=110, PETRI_TRANSITIONS=156} [2024-06-27 18:02:59,908 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 51 predicate places. [2024-06-27 18:02:59,908 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 156 transitions, 1523 flow [2024-06-27 18:02:59,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.375) internal successors, (259), 8 states have internal predecessors, (259), 0 states have call successors, (0), 0 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 18:02:59,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:59,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:59,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-06-27 18:03:00,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:00,111 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:00,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:00,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1727794177, now seen corresponding path program 1 times [2024-06-27 18:03:00,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:00,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605632160] [2024-06-27 18:03:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:00,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:03:00,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:00,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605632160] [2024-06-27 18:03:00,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605632160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:00,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:00,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:03:00,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506033630] [2024-06-27 18:03:00,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:00,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:03:00,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:00,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:03:00,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:03:00,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 18:03:00,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 156 transitions, 1523 flow. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 18:03:00,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:00,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 18:03:00,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:04,611 INFO L124 PetriNetUnfolderBase]: 23275/39755 cut-off events. [2024-06-27 18:03:04,611 INFO L125 PetriNetUnfolderBase]: For 196231/199828 co-relation queries the response was YES. [2024-06-27 18:03:04,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143292 conditions, 39755 events. 23275/39755 cut-off events. For 196231/199828 co-relation queries the response was YES. Maximal size of possible extension queue 2134. Compared 379844 event pairs, 15473 based on Foata normal form. 2953/40346 useless extension candidates. Maximal degree in co-relation 131081. Up to 21841 conditions per place. [2024-06-27 18:03:05,004 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 129 selfloop transitions, 11 changer transitions 6/171 dead transitions. [2024-06-27 18:03:05,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 171 transitions, 1907 flow [2024-06-27 18:03:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:03:05,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:03:05,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 162 transitions. [2024-06-27 18:03:05,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7105263157894737 [2024-06-27 18:03:05,006 INFO L175 Difference]: Start difference. First operand has 110 places, 156 transitions, 1523 flow. Second operand 4 states and 162 transitions. [2024-06-27 18:03:05,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 171 transitions, 1907 flow [2024-06-27 18:03:05,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 171 transitions, 1865 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-27 18:03:05,267 INFO L231 Difference]: Finished difference. Result has 111 places, 128 transitions, 1202 flow [2024-06-27 18:03:05,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1202, PETRI_PLACES=111, PETRI_TRANSITIONS=128} [2024-06-27 18:03:05,268 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 52 predicate places. [2024-06-27 18:03:05,268 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 128 transitions, 1202 flow [2024-06-27 18:03:05,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 18:03:05,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:05,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:05,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:03:05,269 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:05,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:05,269 INFO L85 PathProgramCache]: Analyzing trace with hash 696536217, now seen corresponding path program 1 times [2024-06-27 18:03:05,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:05,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777705308] [2024-06-27 18:03:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:05,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:03:05,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:05,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777705308] [2024-06-27 18:03:05,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777705308] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:05,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248381985] [2024-06-27 18:03:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:05,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:05,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:05,586 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:05,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 18:03:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:05,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 18:03:05,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 18:03:05,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:06,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248381985] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:06,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:06,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 11] total 25 [2024-06-27 18:03:06,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548426499] [2024-06-27 18:03:06,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:06,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 18:03:06,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:06,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 18:03:06,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2024-06-27 18:03:06,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 57 [2024-06-27 18:03:06,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 128 transitions, 1202 flow. Second operand has 26 states, 26 states have (on average 14.73076923076923) internal successors, (383), 26 states have internal predecessors, (383), 0 states have call successors, (0), 0 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 18:03:06,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:06,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 57 [2024-06-27 18:03:06,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand