./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_unsafe-6.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/fib_unsafe-6.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-6.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/fib_unsafe-6.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-?-80b1b13-m [2024-01-31 17:29:18,428 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:29:18,549 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:29:18,556 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:29:18,556 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:29:18,586 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:29:18,587 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:29:18,587 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:29:18,588 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:29:18,591 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:29:18,592 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:29:18,592 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:29:18,593 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:29:18,594 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:29:18,594 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:29:18,595 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:29:18,595 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:29:18,595 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:29:18,595 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:29:18,596 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:29:18,596 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:29:18,596 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:29:18,597 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:29:18,597 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:29:18,597 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:29:18,597 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:29:18,598 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:29:18,598 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:29:18,598 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:29:18,599 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:29:18,600 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:29:18,600 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:29:18,600 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:29:18,600 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:29:18,600 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:29:18,601 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:29:18,601 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:29:18,601 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:29:18,601 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:29:18,601 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:29:18,602 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:29:18,602 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:29:18,602 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:29:18,602 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:29:18,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:29:18,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:29:18,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:29:18,889 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:29:18,892 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:29:18,893 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/fib_unsafe-6.yml/witness.yml [2024-01-31 17:29:19,079 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:29:19,080 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:29:19,081 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-6.i [2024-01-31 17:29:20,233 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:29:20,485 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:29:20,486 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-6.i [2024-01-31 17:29:20,497 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba25e4b5c/b60faa02088749fdb4a26f6b6dc222f6/FLAG73ba5274c [2024-01-31 17:29:20,517 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba25e4b5c/b60faa02088749fdb4a26f6b6dc222f6 [2024-01-31 17:29:20,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:29:20,518 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:29:20,521 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:29:20,521 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:29:20,526 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:29:20,527 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:29:19" (1/2) ... [2024-01-31 17:29:20,528 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f84b61a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20, skipping insertion in model container [2024-01-31 17:29:20,528 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:29:19" (1/2) ... [2024-01-31 17:29:20,529 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7d45b6a2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20, skipping insertion in model container [2024-01-31 17:29:20,530 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:29:20" (2/2) ... [2024-01-31 17:29:20,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f84b61a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20, skipping insertion in model container [2024-01-31 17:29:20,530 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:29:20" (2/2) ... [2024-01-31 17:29:20,530 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:29:20,727 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 17:29:20,729 INFO L98 nessWitnessExtractor]: Location invariant after [L681-L681] expression == 1 [2024-01-31 17:29:20,729 INFO L98 nessWitnessExtractor]: Location invariant after [L722-L722] assert_cond == (_Bool)0 || assert_cond == (_Bool)1 [2024-01-31 17:29:20,729 INFO L98 nessWitnessExtractor]: Location invariant before [L681-L681] expression == 0 [2024-01-31 17:29:20,729 INFO L98 nessWitnessExtractor]: Location invariant after [L724-L724] (((((1 <= i) && (1 <= j)) && (2 <= correct)) && (i <= 2147483646)) && (correct != 0)) && (assert_cond == (_Bool)0 || assert_cond == (_Bool)1) [2024-01-31 17:29:20,774 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:29:21,083 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-6.i[30243,30256] [2024-01-31 17:29:21,104 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:29:21,116 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:29:21,154 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-6.i[30243,30256] Start Parsing Local [2024-01-31 17:29:21,192 WARN L424 MainDispatcher]: Unable to annotate ; with a witness entry [2024-01-31 17:29:21,199 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 17:29:21,199 WARN L424 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-01-31 17:29:21,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:29:21,238 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:29:21,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:21 WrapperNode [2024-01-31 17:29:21,239 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:29:21,240 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:29:21,241 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:29:21,241 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:29:21,247 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:21" (1/1) ... [2024-01-31 17:29:21,284 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:21" (1/1) ... [2024-01-31 17:29:21,310 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2024-01-31 17:29:21,310 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:29:21,311 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:29:21,311 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:29:21,312 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:29:21,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:21" (1/1) ... [2024-01-31 17:29:21,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:21" (1/1) ... [2024-01-31 17:29:21,327 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:21" (1/1) ... [2024-01-31 17:29:21,353 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-31 17:29:21,354 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:21" (1/1) ... [2024-01-31 17:29:21,354 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:21" (1/1) ... [2024-01-31 17:29:21,364 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:21" (1/1) ... [2024-01-31 17:29:21,367 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:21" (1/1) ... [2024-01-31 17:29:21,373 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:21" (1/1) ... [2024-01-31 17:29:21,380 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:21" (1/1) ... [2024-01-31 17:29:21,382 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:29:21,386 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:29:21,386 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:29:21,387 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:29:21,387 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:21" (1/1) ... [2024-01-31 17:29:21,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:29:21,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:21,417 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) [2024-01-31 17:29:21,436 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 [2024-01-31 17:29:21,451 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-31 17:29:21,452 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-31 17:29:21,452 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-31 17:29:21,452 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-31 17:29:21,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:29:21,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:29:21,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:29:21,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:29:21,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:29:21,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:29:21,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:29:21,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:29:21,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:29:21,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:29:21,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:29:21,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:29:21,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:29:21,457 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 17:29:21,612 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:29:21,615 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:29:21,755 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:29:21,755 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:29:21,834 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:29:21,834 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 17:29:21,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:29:21 BoogieIcfgContainer [2024-01-31 17:29:21,835 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:29:21,836 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:29:21,836 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:29:21,839 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:29:21,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:29:19" (1/4) ... [2024-01-31 17:29:21,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c705092 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:29:21, skipping insertion in model container [2024-01-31 17:29:21,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:29:20" (2/4) ... [2024-01-31 17:29:21,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c705092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:29:21, skipping insertion in model container [2024-01-31 17:29:21,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:21" (3/4) ... [2024-01-31 17:29:21,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c705092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:29:21, skipping insertion in model container [2024-01-31 17:29:21,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:29:21" (4/4) ... [2024-01-31 17:29:21,842 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-6.i [2024-01-31 17:29:21,857 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:29:21,858 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-01-31 17:29:21,858 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:29:21,883 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 17:29:21,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 31 transitions, 70 flow [2024-01-31 17:29:21,933 INFO L124 PetriNetUnfolderBase]: 4/29 cut-off events. [2024-01-31 17:29:21,934 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 17:29:21,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 4/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-01-31 17:29:21,936 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 31 transitions, 70 flow [2024-01-31 17:29:21,939 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 29 transitions, 64 flow [2024-01-31 17:29:21,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:29:21,953 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;@33b805ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:29:21,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-31 17:29:21,962 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:29:21,963 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2024-01-31 17:29:21,963 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 17:29:21,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:21,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:21,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:29:21,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:21,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1052799117, now seen corresponding path program 1 times [2024-01-31 17:29:21,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:21,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650002656] [2024-01-31 17:29:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:21,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:22,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:22,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650002656] [2024-01-31 17:29:22,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650002656] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:29:22,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:29:22,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:29:22,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229716912] [2024-01-31 17:29:22,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:29:22,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:29:22,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:22,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:29:22,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:29:22,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 17:29:22,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:22,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:22,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 17:29:22,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:22,441 INFO L124 PetriNetUnfolderBase]: 115/241 cut-off events. [2024-01-31 17:29:22,442 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 17:29:22,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 241 events. 115/241 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 824 event pairs, 20 based on Foata normal form. 9/218 useless extension candidates. Maximal degree in co-relation 416. Up to 118 conditions per place. [2024-01-31 17:29:22,448 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 20 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2024-01-31 17:29:22,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 122 flow [2024-01-31 17:29:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:29:22,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:29:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-01-31 17:29:22,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7204301075268817 [2024-01-31 17:29:22,460 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 64 flow. Second operand 3 states and 67 transitions. [2024-01-31 17:29:22,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 122 flow [2024-01-31 17:29:22,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 120 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 17:29:22,466 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 70 flow [2024-01-31 17:29:22,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-01-31 17:29:22,472 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2024-01-31 17:29:22,473 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 70 flow [2024-01-31 17:29:22,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:22,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:22,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:22,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:29:22,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:29:22,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:22,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1697611135, now seen corresponding path program 1 times [2024-01-31 17:29:22,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:22,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648491317] [2024-01-31 17:29:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:22,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:22,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:22,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648491317] [2024-01-31 17:29:22,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648491317] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:22,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085479014] [2024-01-31 17:29:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:22,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:22,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:22,605 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) [2024-01-31 17:29:22,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 17:29:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:22,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 17:29:22,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:29:22,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:29:22,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085479014] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:29:22,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 17:29:22,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-01-31 17:29:22,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132124073] [2024-01-31 17:29:22,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:29:22,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:29:22,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:22,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:29:22,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:29:22,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-01-31 17:29:22,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:22,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:22,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-01-31 17:29:22,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:22,849 INFO L124 PetriNetUnfolderBase]: 151/259 cut-off events. [2024-01-31 17:29:22,849 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:29:22,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 259 events. 151/259 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 709 event pairs, 68 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 524. Up to 178 conditions per place. [2024-01-31 17:29:22,859 INFO L140 encePairwiseOnDemand]: 29/31 looper letters, 23 selfloop transitions, 1 changer transitions 1/33 dead transitions. [2024-01-31 17:29:22,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 130 flow [2024-01-31 17:29:22,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:29:22,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:29:22,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-01-31 17:29:22,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913978494623656 [2024-01-31 17:29:22,861 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 70 flow. Second operand 3 states and 55 transitions. [2024-01-31 17:29:22,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 130 flow [2024-01-31 17:29:22,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:29:22,863 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 66 flow [2024-01-31 17:29:22,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-01-31 17:29:22,864 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2024-01-31 17:29:22,864 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 66 flow [2024-01-31 17:29:22,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:22,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:22,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:22,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 17:29:23,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:23,073 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:29:23,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:23,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1086337880, now seen corresponding path program 1 times [2024-01-31 17:29:23,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:23,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795411780] [2024-01-31 17:29:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:23,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:23,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:23,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795411780] [2024-01-31 17:29:23,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795411780] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:23,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190017786] [2024-01-31 17:29:23,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:23,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:23,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:23,155 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) [2024-01-31 17:29:23,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 17:29:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:23,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 17:29:23,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:23,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:23,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190017786] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:23,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:23,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-01-31 17:29:23,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625565446] [2024-01-31 17:29:23,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:23,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 17:29:23,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:23,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 17:29:23,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:29:23,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 17:29:23,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:23,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:23,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 17:29:23,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:23,408 INFO L124 PetriNetUnfolderBase]: 151/277 cut-off events. [2024-01-31 17:29:23,409 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:29:23,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 277 events. 151/277 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 771 event pairs, 20 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 569. Up to 91 conditions per place. [2024-01-31 17:29:23,412 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 38 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-01-31 17:29:23,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 212 flow [2024-01-31 17:29:23,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:29:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:29:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-01-31 17:29:23,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6989247311827957 [2024-01-31 17:29:23,418 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 66 flow. Second operand 6 states and 130 transitions. [2024-01-31 17:29:23,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 212 flow [2024-01-31 17:29:23,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 53 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:29:23,423 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 101 flow [2024-01-31 17:29:23,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2024-01-31 17:29:23,424 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2024-01-31 17:29:23,427 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 101 flow [2024-01-31 17:29:23,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:23,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:23,427 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:23,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:29:23,640 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,SelfDestructingSolverStorable2 [2024-01-31 17:29:23,641 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:29:23,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:23,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1699060964, now seen corresponding path program 2 times [2024-01-31 17:29:23,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:23,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257832735] [2024-01-31 17:29:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:23,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:23,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:23,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257832735] [2024-01-31 17:29:23,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257832735] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:23,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515557479] [2024-01-31 17:29:23,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:29:23,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:23,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:23,800 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) [2024-01-31 17:29:23,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 17:29:23,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:29:23,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:29:23,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:29:23,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:23,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:23,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515557479] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:23,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:23,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-31 17:29:23,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847129725] [2024-01-31 17:29:23,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:23,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:29:23,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:23,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:29:23,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:29:23,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 17:29:23,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 101 flow. Second operand has 13 states, 13 states have (on average 15.538461538461538) internal successors, (202), 13 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:23,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:23,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 17:29:23,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:24,146 INFO L124 PetriNetUnfolderBase]: 259/439 cut-off events. [2024-01-31 17:29:24,146 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-01-31 17:29:24,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1119 conditions, 439 events. 259/439 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1170 event pairs, 20 based on Foata normal form. 54/488 useless extension candidates. Maximal degree in co-relation 1100. Up to 109 conditions per place. [2024-01-31 17:29:24,151 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 74 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-01-31 17:29:24,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 95 transitions, 427 flow [2024-01-31 17:29:24,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 17:29:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 17:29:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 259 transitions. [2024-01-31 17:29:24,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.696236559139785 [2024-01-31 17:29:24,155 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 101 flow. Second operand 12 states and 259 transitions. [2024-01-31 17:29:24,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 95 transitions, 427 flow [2024-01-31 17:29:24,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 95 transitions, 413 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-31 17:29:24,160 INFO L231 Difference]: Finished difference. Result has 54 places, 35 transitions, 171 flow [2024-01-31 17:29:24,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=171, PETRI_PLACES=54, PETRI_TRANSITIONS=35} [2024-01-31 17:29:24,161 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2024-01-31 17:29:24,161 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 35 transitions, 171 flow [2024-01-31 17:29:24,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.538461538461538) internal successors, (202), 13 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:24,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:24,161 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:24,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 17:29:24,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:24,384 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:29:24,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:24,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1349105564, now seen corresponding path program 3 times [2024-01-31 17:29:24,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:24,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725908698] [2024-01-31 17:29:24,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:24,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:24,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:24,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725908698] [2024-01-31 17:29:24,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725908698] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:24,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929977779] [2024-01-31 17:29:24,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:29:24,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:24,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:24,631 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) [2024-01-31 17:29:24,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 17:29:24,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-01-31 17:29:24,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:29:24,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:29:24,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:24,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:24,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929977779] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:24,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:24,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 17 [2024-01-31 17:29:24,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725502733] [2024-01-31 17:29:24,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:24,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:29:24,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:24,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:29:24,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:29:24,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 17:29:24,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 35 transitions, 171 flow. Second operand has 17 states, 17 states have (on average 15.470588235294118) internal successors, (263), 17 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:24,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:24,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 17:29:24,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:25,140 INFO L124 PetriNetUnfolderBase]: 331/547 cut-off events. [2024-01-31 17:29:25,141 INFO L125 PetriNetUnfolderBase]: For 1611/1611 co-relation queries the response was YES. [2024-01-31 17:29:25,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 547 events. 331/547 cut-off events. For 1611/1611 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1436 event pairs, 20 based on Foata normal form. 36/578 useless extension candidates. Maximal degree in co-relation 1577. Up to 118 conditions per place. [2024-01-31 17:29:25,146 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 98 selfloop transitions, 15 changer transitions 0/123 dead transitions. [2024-01-31 17:29:25,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 123 transitions, 597 flow [2024-01-31 17:29:25,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 17:29:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 17:29:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 341 transitions. [2024-01-31 17:29:25,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-01-31 17:29:25,149 INFO L175 Difference]: Start difference. First operand has 54 places, 35 transitions, 171 flow. Second operand 16 states and 341 transitions. [2024-01-31 17:29:25,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 123 transitions, 597 flow [2024-01-31 17:29:25,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 123 transitions, 541 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-01-31 17:29:25,156 INFO L231 Difference]: Finished difference. Result has 68 places, 39 transitions, 195 flow [2024-01-31 17:29:25,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=195, PETRI_PLACES=68, PETRI_TRANSITIONS=39} [2024-01-31 17:29:25,157 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 36 predicate places. [2024-01-31 17:29:25,157 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 39 transitions, 195 flow [2024-01-31 17:29:25,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.470588235294118) internal successors, (263), 17 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:25,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:25,158 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:25,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 17:29:25,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:25,379 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:29:25,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:25,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1359037796, now seen corresponding path program 4 times [2024-01-31 17:29:25,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:25,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774777657] [2024-01-31 17:29:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:25,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:26,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:26,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774777657] [2024-01-31 17:29:26,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774777657] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:26,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833562863] [2024-01-31 17:29:26,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:29:26,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:26,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:26,428 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) [2024-01-31 17:29:26,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 17:29:26,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:29:26,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:29:26,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 53 conjunts are in the unsatisfiable core [2024-01-31 17:29:26,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:27,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:28,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833562863] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:28,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:28,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 59 [2024-01-31 17:29:28,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131661258] [2024-01-31 17:29:28,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:28,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-01-31 17:29:28,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:28,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-01-31 17:29:28,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=3032, Unknown=0, NotChecked=0, Total=3540 [2024-01-31 17:29:28,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-01-31 17:29:28,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 39 transitions, 195 flow. Second operand has 60 states, 60 states have (on average 6.3) internal successors, (378), 60 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:28,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:28,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-01-31 17:29:28,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:43,135 INFO L124 PetriNetUnfolderBase]: 14968/24673 cut-off events. [2024-01-31 17:29:43,135 INFO L125 PetriNetUnfolderBase]: For 54615/54615 co-relation queries the response was YES. [2024-01-31 17:29:43,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66223 conditions, 24673 events. 14968/24673 cut-off events. For 54615/54615 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 160059 event pairs, 124 based on Foata normal form. 315/24984 useless extension candidates. Maximal degree in co-relation 66191. Up to 3174 conditions per place. [2024-01-31 17:29:43,291 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 599 selfloop transitions, 575 changer transitions 437/1614 dead transitions. [2024-01-31 17:29:43,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 1614 transitions, 10046 flow [2024-01-31 17:29:43,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2024-01-31 17:29:43,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2024-01-31 17:29:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 1946 transitions. [2024-01-31 17:29:43,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359318996415771 [2024-01-31 17:29:43,303 INFO L175 Difference]: Start difference. First operand has 68 places, 39 transitions, 195 flow. Second operand 144 states and 1946 transitions. [2024-01-31 17:29:43,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 1614 transitions, 10046 flow [2024-01-31 17:29:43,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 1614 transitions, 8520 flow, removed 442 selfloop flow, removed 11 redundant places. [2024-01-31 17:29:43,607 INFO L231 Difference]: Finished difference. Result has 270 places, 667 transitions, 4023 flow [2024-01-31 17:29:43,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=144, PETRI_FLOW=4023, PETRI_PLACES=270, PETRI_TRANSITIONS=667} [2024-01-31 17:29:43,611 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 238 predicate places. [2024-01-31 17:29:43,611 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 667 transitions, 4023 flow [2024-01-31 17:29:43,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 6.3) internal successors, (378), 60 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:43,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:43,614 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:43,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 17:29:43,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:43,829 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:29:43,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:43,829 INFO L85 PathProgramCache]: Analyzing trace with hash 880351238, now seen corresponding path program 1 times [2024-01-31 17:29:43,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:43,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533273647] [2024-01-31 17:29:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:43,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:44,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:44,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533273647] [2024-01-31 17:29:44,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533273647] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:44,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670820472] [2024-01-31 17:29:44,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:44,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:44,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:44,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:29:44,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 17:29:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:44,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 55 conjunts are in the unsatisfiable core [2024-01-31 17:29:44,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 78 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:45,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:46,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670820472] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:46,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:46,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 66 [2024-01-31 17:29:46,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739607309] [2024-01-31 17:29:46,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:46,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-01-31 17:29:46,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:46,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-01-31 17:29:46,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=3874, Unknown=0, NotChecked=0, Total=4422 [2024-01-31 17:29:46,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-01-31 17:29:46,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 667 transitions, 4023 flow. Second operand has 67 states, 67 states have (on average 6.343283582089552) internal successors, (425), 67 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:46,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:46,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-01-31 17:29:46,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand