./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_70-funloop_racefree.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec 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/goblint-regression/28-race_reach_70-funloop_racefree.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_70-funloop_racefree.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-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:07:24,070 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:07:24,139 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:07:24,145 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:07:24,146 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:07:24,172 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:07:24,172 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:07:24,173 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:07:24,173 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:07:24,177 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:07:24,177 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:07:24,177 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:07:24,178 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:07:24,179 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:07:24,179 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:07:24,180 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:07:24,180 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:07:24,180 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:07:24,180 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:07:24,180 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:07:24,181 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:07:24,181 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:07:24,181 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:07:24,181 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:07:24,182 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:07:24,182 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:07:24,182 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:07:24,182 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:07:24,183 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:07:24,183 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:07:24,184 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:07:24,184 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:07:24,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:07:24,185 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:07:24,185 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:07:24,185 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:07:24,185 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:07:24,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:07:24,185 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:07:24,186 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:07:24,186 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:07:24,186 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:07:24,186 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:07:24,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:07:24,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:07:24,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:07:24,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:07:24,429 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:07:24,430 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:07:24,431 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_70-funloop_racefree.yml/witness.yml [2024-02-07 19:07:24,531 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:07:24,532 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:07:24,533 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2024-02-07 19:07:25,587 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:07:25,864 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:07:25,868 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2024-02-07 19:07:25,893 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aebe3bb95/415a8145f6204b18ab9aabc51ea9b193/FLAGee7026389 [2024-02-07 19:07:25,909 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aebe3bb95/415a8145f6204b18ab9aabc51ea9b193 [2024-02-07 19:07:25,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:07:25,911 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:07:25,913 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:07:25,914 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:07:25,918 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:07:25,918 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:07:24" (1/2) ... [2024-02-07 19:07:25,920 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@665ab0e6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:25, skipping insertion in model container [2024-02-07 19:07:25,920 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:07:24" (1/2) ... [2024-02-07 19:07:25,922 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@45d23771 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:25, skipping insertion in model container [2024-02-07 19:07:25,922 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:07:25" (2/2) ... [2024-02-07 19:07:25,923 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@665ab0e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:25, skipping insertion in model container [2024-02-07 19:07:25,923 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:07:25" (2/2) ... [2024-02-07 19:07:25,924 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:07:25,977 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:07:25,978 INFO L76 edCorrectnessWitness]: Location invariant after [L954-L954] ((((((((((((((((((((((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19) || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4 [2024-02-07 19:07:25,979 INFO L76 edCorrectnessWitness]: Location invariant before [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 19:07:25,979 INFO L76 edCorrectnessWitness]: Location invariant before [L957-L957] (((((((((((((((((((((((((25 <= i && i <= 9999) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19) || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 19:07:25,979 INFO L76 edCorrectnessWitness]: Location invariant before [L956-L956] ((((((((i == 9 || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 19:07:25,979 INFO L76 edCorrectnessWitness]: Location invariant after [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 19:07:25,979 INFO L76 edCorrectnessWitness]: Location invariant after [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 19:07:25,979 INFO L76 edCorrectnessWitness]: Location invariant before [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 19:07:25,979 INFO L76 edCorrectnessWitness]: Location invariant after [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 19:07:25,980 INFO L76 edCorrectnessWitness]: Location invariant after [L957-L957] (((((((((((((((((((((((((25 <= i && i <= 9999) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19) || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 19:07:25,980 INFO L76 edCorrectnessWitness]: Location invariant before [L952-L952] ((((((((i == 9 || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 19:07:25,980 INFO L76 edCorrectnessWitness]: Location invariant before [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 19:07:25,980 INFO L76 edCorrectnessWitness]: Location invariant before [L954-L954] ((((((((((((((((((((((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19) || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4 [2024-02-07 19:07:25,980 INFO L76 edCorrectnessWitness]: Location invariant before [L947-L947] ((((((((i == 9 || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 19:07:26,056 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:07:26,510 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2024-02-07 19:07:26,531 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:07:26,597 INFO L206 MainTranslator]: Completed pre-run [2024-02-07 19:07:26,692 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 19:07:26,872 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:07:26,961 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:07:26,976 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:26 WrapperNode [2024-02-07 19:07:26,977 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:07:26,978 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:07:26,978 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:07:26,979 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:07:26,984 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:26" (1/1) ... [2024-02-07 19:07:27,028 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:26" (1/1) ... [2024-02-07 19:07:27,103 INFO L138 Inliner]: procedures = 272, calls = 35, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 229 [2024-02-07 19:07:27,103 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:07:27,104 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:07:27,104 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:07:27,105 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:07:27,118 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:26" (1/1) ... [2024-02-07 19:07:27,132 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:26" (1/1) ... [2024-02-07 19:07:27,147 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:26" (1/1) ... [2024-02-07 19:07:27,189 INFO L175 MemorySlicer]: Split 20 memory accesses to 4 slices as follows [2, 5, 2, 11]. 55 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0]. The 6 writes are split as follows [0, 0, 1, 5]. [2024-02-07 19:07:27,191 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:26" (1/1) ... [2024-02-07 19:07:27,192 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:26" (1/1) ... [2024-02-07 19:07:27,205 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:26" (1/1) ... [2024-02-07 19:07:27,209 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:26" (1/1) ... [2024-02-07 19:07:27,211 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:26" (1/1) ... [2024-02-07 19:07:27,212 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:26" (1/1) ... [2024-02-07 19:07:27,215 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:07:27,216 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:07:27,216 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:07:27,216 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:07:27,217 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:26" (1/1) ... [2024-02-07 19:07:27,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:07:27,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:07:27,295 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) [2024-02-07 19:07:27,372 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 [2024-02-07 19:07:27,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:07:27,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:07:27,419 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-07 19:07:27,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 19:07:27,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 19:07:27,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 19:07:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 19:07:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:07:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:07:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:07:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 19:07:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-07 19:07:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:07:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-02-07 19:07:27,421 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-02-07 19:07:27,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:07:27,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:07:27,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:07:27,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 19:07:27,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:07:27,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:07:27,423 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 19:07:27,542 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:07:27,544 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:07:27,957 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:07:27,957 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:07:28,130 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:07:28,131 INFO L320 CfgBuilder]: Removed 25 assume(true) statements. [2024-02-07 19:07:28,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:07:28 BoogieIcfgContainer [2024-02-07 19:07:28,132 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:07:28,149 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:07:28,150 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:07:28,152 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:07:28,152 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:07:24" (1/4) ... [2024-02-07 19:07:28,154 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@beeab8b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:07:28, skipping insertion in model container [2024-02-07 19:07:28,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:07:25" (2/4) ... [2024-02-07 19:07:28,154 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@beeab8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:07:28, skipping insertion in model container [2024-02-07 19:07:28,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:26" (3/4) ... [2024-02-07 19:07:28,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@beeab8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:07:28, skipping insertion in model container [2024-02-07 19:07:28,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:07:28" (4/4) ... [2024-02-07 19:07:28,156 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2024-02-07 19:07:28,170 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:07:28,170 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-02-07 19:07:28,171 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:07:28,215 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-02-07 19:07:28,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 113 transitions, 233 flow [2024-02-07 19:07:28,304 INFO L124 PetriNetUnfolderBase]: 41/164 cut-off events. [2024-02-07 19:07:28,304 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 19:07:28,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 164 events. 41/164 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 654 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 102. Up to 8 conditions per place. [2024-02-07 19:07:28,313 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 113 transitions, 233 flow [2024-02-07 19:07:28,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 112 transitions, 231 flow [2024-02-07 19:07:28,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:07:28,336 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;@17633b37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:07:28,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-02-07 19:07:28,342 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:07:28,342 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-02-07 19:07:28,343 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:07:28,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:28,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-07 19:07:28,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 16 more)] === [2024-02-07 19:07:28,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:28,348 INFO L85 PathProgramCache]: Analyzing trace with hash 618569, now seen corresponding path program 1 times [2024-02-07 19:07:28,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:28,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014797106] [2024-02-07 19:07:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:28,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:28,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:28,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014797106] [2024-02-07 19:07:28,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014797106] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:07:28,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:07:28,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:07:28,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218398352] [2024-02-07 19:07:28,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:07:28,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:07:28,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:28,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:07:28,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:07:28,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 113 [2024-02-07 19:07:28,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 112 transitions, 231 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2024-02-07 19:07:28,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:28,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 113 [2024-02-07 19:07:28,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:28,891 INFO L124 PetriNetUnfolderBase]: 503/1485 cut-off events. [2024-02-07 19:07:28,892 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 19:07:28,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2441 conditions, 1485 events. 503/1485 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 10050 event pairs, 414 based on Foata normal form. 305/1663 useless extension candidates. Maximal degree in co-relation 2350. Up to 950 conditions per place. [2024-02-07 19:07:28,901 INFO L140 encePairwiseOnDemand]: 87/113 looper letters, 49 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2024-02-07 19:07:28,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 291 flow [2024-02-07 19:07:28,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:07:28,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:07:28,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2024-02-07 19:07:28,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5752212389380531 [2024-02-07 19:07:28,913 INFO L175 Difference]: Start difference. First operand has 88 places, 112 transitions, 231 flow. Second operand 3 states and 195 transitions. [2024-02-07 19:07:28,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 291 flow [2024-02-07 19:07:28,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 291 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:07:28,918 INFO L231 Difference]: Finished difference. Result has 91 places, 91 transitions, 201 flow [2024-02-07 19:07:28,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=91, PETRI_TRANSITIONS=91} [2024-02-07 19:07:28,922 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2024-02-07 19:07:28,923 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 91 transitions, 201 flow [2024-02-07 19:07:28,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2024-02-07 19:07:28,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:28,923 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-02-07 19:07:28,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:07:28,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 16 more)] === [2024-02-07 19:07:28,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash 594463714, now seen corresponding path program 1 times [2024-02-07 19:07:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:28,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414643048] [2024-02-07 19:07:28,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:28,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:29,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:29,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414643048] [2024-02-07 19:07:29,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414643048] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:07:29,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504704377] [2024-02-07 19:07:29,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:29,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:29,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:07:29,113 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) [2024-02-07 19:07:29,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 19:07:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:29,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 19:07:29,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:07:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:29,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:07:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:29,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504704377] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:07:29,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:07:29,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2024-02-07 19:07:29,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590667850] [2024-02-07 19:07:29,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:07:29,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:07:29,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:29,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:07:29,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:07:29,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 113 [2024-02-07 19:07:29,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 201 flow. Second operand has 6 states, 6 states have (on average 40.333333333333336) internal successors, (242), 6 states have internal predecessors, (242), 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) [2024-02-07 19:07:29,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:29,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 113 [2024-02-07 19:07:29,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:29,447 INFO L124 PetriNetUnfolderBase]: 503/1487 cut-off events. [2024-02-07 19:07:29,448 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 19:07:29,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2455 conditions, 1487 events. 503/1487 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 10055 event pairs, 414 based on Foata normal form. 2/1363 useless extension candidates. Maximal degree in co-relation 2441. Up to 947 conditions per place. [2024-02-07 19:07:29,455 INFO L140 encePairwiseOnDemand]: 108/113 looper letters, 49 selfloop transitions, 6 changer transitions 0/94 dead transitions. [2024-02-07 19:07:29,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 94 transitions, 317 flow [2024-02-07 19:07:29,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:07:29,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:07:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 293 transitions. [2024-02-07 19:07:29,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43215339233038347 [2024-02-07 19:07:29,461 INFO L175 Difference]: Start difference. First operand has 91 places, 91 transitions, 201 flow. Second operand 6 states and 293 transitions. [2024-02-07 19:07:29,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 94 transitions, 317 flow [2024-02-07 19:07:29,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 94 transitions, 315 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:07:29,464 INFO L231 Difference]: Finished difference. Result has 95 places, 92 transitions, 218 flow [2024-02-07 19:07:29,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=218, PETRI_PLACES=95, PETRI_TRANSITIONS=92} [2024-02-07 19:07:29,465 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 7 predicate places. [2024-02-07 19:07:29,465 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 92 transitions, 218 flow [2024-02-07 19:07:29,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.333333333333336) internal successors, (242), 6 states have internal predecessors, (242), 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) [2024-02-07 19:07:29,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:29,465 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2024-02-07 19:07:29,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-07 19:07:29,677 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 [2024-02-07 19:07:29,679 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 16 more)] === [2024-02-07 19:07:29,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:29,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1360694213, now seen corresponding path program 1 times [2024-02-07 19:07:29,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:29,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840814965] [2024-02-07 19:07:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:29,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-02-07 19:07:29,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:29,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840814965] [2024-02-07 19:07:29,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840814965] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:07:29,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:07:29,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:07:29,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362512310] [2024-02-07 19:07:29,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:07:29,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:07:29,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:29,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:07:29,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:07:29,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 113 [2024-02-07 19:07:29,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 92 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:07:29,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:29,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 113 [2024-02-07 19:07:29,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:29,911 INFO L124 PetriNetUnfolderBase]: 497/1343 cut-off events. [2024-02-07 19:07:29,911 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-02-07 19:07:29,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2327 conditions, 1343 events. 497/1343 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 9069 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 2291. Up to 938 conditions per place. [2024-02-07 19:07:29,918 INFO L140 encePairwiseOnDemand]: 110/113 looper letters, 70 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2024-02-07 19:07:29,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 112 transitions, 402 flow [2024-02-07 19:07:29,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:07:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:07:29,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2024-02-07 19:07:29,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634218289085545 [2024-02-07 19:07:29,919 INFO L175 Difference]: Start difference. First operand has 95 places, 92 transitions, 218 flow. Second operand 3 states and 191 transitions. [2024-02-07 19:07:29,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 112 transitions, 402 flow [2024-02-07 19:07:29,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 112 transitions, 390 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-02-07 19:07:29,923 INFO L231 Difference]: Finished difference. Result has 95 places, 92 transitions, 214 flow [2024-02-07 19:07:29,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=95, PETRI_TRANSITIONS=92} [2024-02-07 19:07:29,924 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 7 predicate places. [2024-02-07 19:07:29,924 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 92 transitions, 214 flow [2024-02-07 19:07:29,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:07:29,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:29,924 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2024-02-07 19:07:29,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:07:29,925 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 16 more)] === [2024-02-07 19:07:29,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:29,925 INFO L85 PathProgramCache]: Analyzing trace with hash 768197087, now seen corresponding path program 1 times [2024-02-07 19:07:29,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:29,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816718200] [2024-02-07 19:07:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:29,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:29,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:29,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816718200] [2024-02-07 19:07:29,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816718200] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:07:29,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389312963] [2024-02-07 19:07:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:29,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:29,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:07:29,985 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) [2024-02-07 19:07:30,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 19:07:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:30,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 19:07:30,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:07:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:30,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:07:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:30,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389312963] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:07:30,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:07:30,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-02-07 19:07:30,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941041774] [2024-02-07 19:07:30,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:07:30,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 19:07:30,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:30,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 19:07:30,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-02-07 19:07:30,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 113 [2024-02-07 19:07:30,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 92 transitions, 214 flow. Second operand has 11 states, 11 states have (on average 41.0) internal successors, (451), 11 states have internal predecessors, (451), 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) [2024-02-07 19:07:30,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:30,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 113 [2024-02-07 19:07:30,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:30,355 INFO L124 PetriNetUnfolderBase]: 501/1455 cut-off events. [2024-02-07 19:07:30,355 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-02-07 19:07:30,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2490 conditions, 1455 events. 501/1455 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 9637 event pairs, 414 based on Foata normal form. 5/1355 useless extension candidates. Maximal degree in co-relation 2420. Up to 927 conditions per place. [2024-02-07 19:07:30,363 INFO L140 encePairwiseOnDemand]: 109/113 looper letters, 55 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2024-02-07 19:07:30,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 104 transitions, 402 flow [2024-02-07 19:07:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:07:30,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:07:30,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 460 transitions. [2024-02-07 19:07:30,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40707964601769914 [2024-02-07 19:07:30,365 INFO L175 Difference]: Start difference. First operand has 95 places, 92 transitions, 214 flow. Second operand 10 states and 460 transitions. [2024-02-07 19:07:30,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 104 transitions, 402 flow [2024-02-07 19:07:30,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 104 transitions, 398 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:07:30,368 INFO L231 Difference]: Finished difference. Result has 108 places, 98 transitions, 286 flow [2024-02-07 19:07:30,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=286, PETRI_PLACES=108, PETRI_TRANSITIONS=98} [2024-02-07 19:07:30,369 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 20 predicate places. [2024-02-07 19:07:30,369 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 98 transitions, 286 flow [2024-02-07 19:07:30,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 41.0) internal successors, (451), 11 states have internal predecessors, (451), 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) [2024-02-07 19:07:30,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:30,370 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2024-02-07 19:07:30,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 19:07:30,585 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,SelfDestructingSolverStorable3 [2024-02-07 19:07:30,585 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 16 more)] === [2024-02-07 19:07:30,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:30,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1202320638, now seen corresponding path program 2 times [2024-02-07 19:07:30,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:30,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033898043] [2024-02-07 19:07:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:30,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:30,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:30,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033898043] [2024-02-07 19:07:30,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033898043] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:07:30,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135627293] [2024-02-07 19:07:30,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:07:30,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:30,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:07:30,749 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) [2024-02-07 19:07:30,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 19:07:30,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-07 19:07:30,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:07:30,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 32 conjunts are in the unsatisfiable core [2024-02-07 19:07:30,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:07:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-02-07 19:07:30,841 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 19:07:30,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135627293] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:07:30,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 19:07:30,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 13 [2024-02-07 19:07:30,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988180107] [2024-02-07 19:07:30,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:07:30,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:07:30,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:30,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:07:30,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:07:30,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 113 [2024-02-07 19:07:30,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 98 transitions, 286 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 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) [2024-02-07 19:07:30,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:30,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 113 [2024-02-07 19:07:30,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:30,916 INFO L124 PetriNetUnfolderBase]: 60/191 cut-off events. [2024-02-07 19:07:30,916 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-02-07 19:07:30,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 191 events. 60/191 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 681 event pairs, 0 based on Foata normal form. 19/202 useless extension candidates. Maximal degree in co-relation 336. Up to 114 conditions per place. [2024-02-07 19:07:30,917 INFO L140 encePairwiseOnDemand]: 109/113 looper letters, 51 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-02-07 19:07:30,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 75 transitions, 341 flow [2024-02-07 19:07:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:07:30,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:07:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 208 transitions. [2024-02-07 19:07:30,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46017699115044247 [2024-02-07 19:07:30,919 INFO L175 Difference]: Start difference. First operand has 108 places, 98 transitions, 286 flow. Second operand 4 states and 208 transitions. [2024-02-07 19:07:30,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 75 transitions, 341 flow [2024-02-07 19:07:30,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 335 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 19:07:30,924 INFO L231 Difference]: Finished difference. Result has 67 places, 55 transitions, 193 flow [2024-02-07 19:07:30,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2024-02-07 19:07:30,926 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -21 predicate places. [2024-02-07 19:07:30,926 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 193 flow [2024-02-07 19:07:30,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 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) [2024-02-07 19:07:30,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:30,927 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:07:30,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-07 19:07:31,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:31,139 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 16 more)] === [2024-02-07 19:07:31,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:31,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1382810998, now seen corresponding path program 1 times [2024-02-07 19:07:31,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:31,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724042086] [2024-02-07 19:07:31,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:31,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-02-07 19:07:31,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:31,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724042086] [2024-02-07 19:07:31,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724042086] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:07:31,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:07:31,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:07:31,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078216591] [2024-02-07 19:07:31,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:07:31,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:07:31,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:31,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:07:31,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:07:31,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 113 [2024-02-07 19:07:31,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2024-02-07 19:07:31,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:31,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 113 [2024-02-07 19:07:31,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:31,303 INFO L124 PetriNetUnfolderBase]: 121/417 cut-off events. [2024-02-07 19:07:31,303 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-02-07 19:07:31,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 417 events. 121/417 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1595 event pairs, 57 based on Foata normal form. 4/400 useless extension candidates. Maximal degree in co-relation 707. Up to 153 conditions per place. [2024-02-07 19:07:31,305 INFO L140 encePairwiseOnDemand]: 109/113 looper letters, 52 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-02-07 19:07:31,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 75 transitions, 343 flow [2024-02-07 19:07:31,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:07:31,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:07:31,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2024-02-07 19:07:31,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49852507374631266 [2024-02-07 19:07:31,306 INFO L175 Difference]: Start difference. First operand has 67 places, 55 transitions, 193 flow. Second operand 3 states and 169 transitions. [2024-02-07 19:07:31,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 75 transitions, 343 flow [2024-02-07 19:07:31,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 339 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:07:31,308 INFO L231 Difference]: Finished difference. Result has 68 places, 56 transitions, 204 flow [2024-02-07 19:07:31,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=68, PETRI_TRANSITIONS=56} [2024-02-07 19:07:31,309 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -20 predicate places. [2024-02-07 19:07:31,309 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 56 transitions, 204 flow [2024-02-07 19:07:31,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2024-02-07 19:07:31,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:31,310 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 19:07:31,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 19:07:31,310 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 16 more)] === [2024-02-07 19:07:31,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:31,310 INFO L85 PathProgramCache]: Analyzing trace with hash -83911129, now seen corresponding path program 1 times [2024-02-07 19:07:31,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:31,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330771086] [2024-02-07 19:07:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:31,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 19:07:31,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:31,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330771086] [2024-02-07 19:07:31,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330771086] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:07:31,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940141903] [2024-02-07 19:07:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:31,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:31,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:07:31,429 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:07:31,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 19:07:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:31,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:07:31,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:07:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 19:07:31,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:07:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 19:07:31,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940141903] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:07:31,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:07:31,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2024-02-07 19:07:31,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228489559] [2024-02-07 19:07:31,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:07:31,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:07:31,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:31,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:07:31,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:07:31,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 113 [2024-02-07 19:07:31,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 204 flow. Second operand has 13 states, 13 states have (on average 41.23076923076923) internal successors, (536), 13 states have internal predecessors, (536), 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) [2024-02-07 19:07:31,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:31,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 113 [2024-02-07 19:07:31,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:31,698 INFO L124 PetriNetUnfolderBase]: 118/417 cut-off events. [2024-02-07 19:07:31,699 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-02-07 19:07:31,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832 conditions, 417 events. 118/417 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1566 event pairs, 105 based on Foata normal form. 2/402 useless extension candidates. Maximal degree in co-relation 718. Up to 257 conditions per place. [2024-02-07 19:07:31,700 INFO L140 encePairwiseOnDemand]: 109/113 looper letters, 35 selfloop transitions, 12 changer transitions 0/66 dead transitions. [2024-02-07 19:07:31,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 66 transitions, 370 flow [2024-02-07 19:07:31,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:07:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:07:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 516 transitions. [2024-02-07 19:07:31,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3805309734513274 [2024-02-07 19:07:31,702 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 204 flow. Second operand 12 states and 516 transitions. [2024-02-07 19:07:31,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 66 transitions, 370 flow [2024-02-07 19:07:31,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 66 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:07:31,704 INFO L231 Difference]: Finished difference. Result has 81 places, 59 transitions, 267 flow [2024-02-07 19:07:31,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=267, PETRI_PLACES=81, PETRI_TRANSITIONS=59} [2024-02-07 19:07:31,705 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -7 predicate places. [2024-02-07 19:07:31,705 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 59 transitions, 267 flow [2024-02-07 19:07:31,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.23076923076923) internal successors, (536), 13 states have internal predecessors, (536), 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) [2024-02-07 19:07:31,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:31,706 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 19:07:31,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 19:07:31,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:31,919 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 16 more)] === [2024-02-07 19:07:31,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:31,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1303401589, now seen corresponding path program 2 times [2024-02-07 19:07:31,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:31,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591629506] [2024-02-07 19:07:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:31,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:07:31,940 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:07:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:07:31,966 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:07:31,966 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:07:31,967 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (18 of 19 remaining) [2024-02-07 19:07:31,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 19 remaining) [2024-02-07 19:07:31,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 19 remaining) [2024-02-07 19:07:31,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 19 remaining) [2024-02-07 19:07:31,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 19 remaining) [2024-02-07 19:07:31,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 19 remaining) [2024-02-07 19:07:31,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 19 remaining) [2024-02-07 19:07:31,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 19 remaining) [2024-02-07 19:07:31,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION (10 of 19 remaining) [2024-02-07 19:07:31,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 19 remaining) [2024-02-07 19:07:31,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 19 remaining) [2024-02-07 19:07:31,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 19 remaining) [2024-02-07 19:07:31,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 19 remaining) [2024-02-07 19:07:31,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONERROR_FUNCTION (5 of 19 remaining) [2024-02-07 19:07:31,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 19 remaining) [2024-02-07 19:07:31,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 19 remaining) [2024-02-07 19:07:31,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 19 remaining) [2024-02-07 19:07:31,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 19 remaining) [2024-02-07 19:07:31,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONERROR_FUNCTION (0 of 19 remaining) [2024-02-07 19:07:31,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 19:07:31,971 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2024-02-07 19:07:31,973 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 19:07:31,973 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-07 19:07:32,004 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 19:07:32,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 163 transitions, 342 flow [2024-02-07 19:07:32,022 INFO L124 PetriNetUnfolderBase]: 69/278 cut-off events. [2024-02-07 19:07:32,022 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-02-07 19:07:32,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 278 events. 69/278 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1334 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 166. Up to 12 conditions per place. [2024-02-07 19:07:32,023 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 163 transitions, 342 flow [2024-02-07 19:07:32,026 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 163 transitions, 342 flow [2024-02-07 19:07:32,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:07:32,027 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;@17633b37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:07:32,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-02-07 19:07:32,028 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:07:32,028 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-02-07 19:07:32,028 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:07:32,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:32,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-07 19:07:32,029 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 21 more)] === [2024-02-07 19:07:32,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:32,029 INFO L85 PathProgramCache]: Analyzing trace with hash 780428, now seen corresponding path program 1 times [2024-02-07 19:07:32,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:32,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262070805] [2024-02-07 19:07:32,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:32,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:32,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:32,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262070805] [2024-02-07 19:07:32,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262070805] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:07:32,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:07:32,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:07:32,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750398105] [2024-02-07 19:07:32,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:07:32,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:07:32,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:32,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:07:32,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:07:32,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 163 [2024-02-07 19:07:32,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 163 transitions, 342 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 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) [2024-02-07 19:07:32,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:32,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 163 [2024-02-07 19:07:32,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:35,126 INFO L124 PetriNetUnfolderBase]: 19284/39318 cut-off events. [2024-02-07 19:07:35,126 INFO L125 PetriNetUnfolderBase]: For 155/155 co-relation queries the response was YES. [2024-02-07 19:07:35,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67212 conditions, 39318 events. 19284/39318 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 1119. Compared 388226 event pairs, 16614 based on Foata normal form. 9279/45293 useless extension candidates. Maximal degree in co-relation 54383. Up to 27791 conditions per place. [2024-02-07 19:07:35,508 INFO L140 encePairwiseOnDemand]: 126/163 looper letters, 71 selfloop transitions, 2 changer transitions 0/131 dead transitions. [2024-02-07 19:07:35,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 131 transitions, 424 flow [2024-02-07 19:07:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:07:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:07:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2024-02-07 19:07:35,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5766871165644172 [2024-02-07 19:07:35,512 INFO L175 Difference]: Start difference. First operand has 126 places, 163 transitions, 342 flow. Second operand 3 states and 282 transitions. [2024-02-07 19:07:35,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 131 transitions, 424 flow [2024-02-07 19:07:35,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 131 transitions, 424 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:07:35,514 INFO L231 Difference]: Finished difference. Result has 129 places, 131 transitions, 290 flow [2024-02-07 19:07:35,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=129, PETRI_TRANSITIONS=131} [2024-02-07 19:07:35,516 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, 3 predicate places. [2024-02-07 19:07:35,516 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 131 transitions, 290 flow [2024-02-07 19:07:35,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 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) [2024-02-07 19:07:35,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:35,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-02-07 19:07:35,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 19:07:35,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 21 more)] === [2024-02-07 19:07:35,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:35,517 INFO L85 PathProgramCache]: Analyzing trace with hash 750015429, now seen corresponding path program 1 times [2024-02-07 19:07:35,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:35,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955907378] [2024-02-07 19:07:35,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:35,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:35,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:35,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955907378] [2024-02-07 19:07:35,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955907378] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:07:35,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691208534] [2024-02-07 19:07:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:35,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:35,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:07:35,631 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) [2024-02-07 19:07:35,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 19:07:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:35,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 19:07:35,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:07:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:35,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:07:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:35,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691208534] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:07:35,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:07:35,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2024-02-07 19:07:35,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768987103] [2024-02-07 19:07:35,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:07:35,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:07:35,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:07:35,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:07:35,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 163 [2024-02-07 19:07:35,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 131 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 58.333333333333336) internal successors, (350), 6 states have internal predecessors, (350), 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) [2024-02-07 19:07:35,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:35,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 163 [2024-02-07 19:07:35,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:38,610 INFO L124 PetriNetUnfolderBase]: 19284/39320 cut-off events. [2024-02-07 19:07:38,610 INFO L125 PetriNetUnfolderBase]: For 155/155 co-relation queries the response was YES. [2024-02-07 19:07:38,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67226 conditions, 39320 events. 19284/39320 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 1119. Compared 388249 event pairs, 16614 based on Foata normal form. 2/36019 useless extension candidates. Maximal degree in co-relation 67211. Up to 27788 conditions per place. [2024-02-07 19:07:38,819 INFO L140 encePairwiseOnDemand]: 158/163 looper letters, 71 selfloop transitions, 6 changer transitions 0/134 dead transitions. [2024-02-07 19:07:38,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 134 transitions, 450 flow [2024-02-07 19:07:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:07:38,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:07:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 423 transitions. [2024-02-07 19:07:38,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325153374233129 [2024-02-07 19:07:38,821 INFO L175 Difference]: Start difference. First operand has 129 places, 131 transitions, 290 flow. Second operand 6 states and 423 transitions. [2024-02-07 19:07:38,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 134 transitions, 450 flow [2024-02-07 19:07:38,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 134 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:07:38,824 INFO L231 Difference]: Finished difference. Result has 133 places, 132 transitions, 307 flow [2024-02-07 19:07:38,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=307, PETRI_PLACES=133, PETRI_TRANSITIONS=132} [2024-02-07 19:07:38,825 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, 7 predicate places. [2024-02-07 19:07:38,826 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 132 transitions, 307 flow [2024-02-07 19:07:38,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.333333333333336) internal successors, (350), 6 states have internal predecessors, (350), 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) [2024-02-07 19:07:38,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:38,826 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2024-02-07 19:07:38,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-02-07 19:07:39,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-07 19:07:39,038 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 21 more)] === [2024-02-07 19:07:39,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:39,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1631304446, now seen corresponding path program 1 times [2024-02-07 19:07:39,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:39,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457318933] [2024-02-07 19:07:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:39,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-02-07 19:07:39,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:39,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457318933] [2024-02-07 19:07:39,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457318933] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:07:39,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:07:39,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:07:39,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718132132] [2024-02-07 19:07:39,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:07:39,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:07:39,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:39,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:07:39,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:07:39,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 163 [2024-02-07 19:07:39,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 132 transitions, 307 flow. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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) [2024-02-07 19:07:39,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:39,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 163 [2024-02-07 19:07:39,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:42,014 INFO L124 PetriNetUnfolderBase]: 20061/40983 cut-off events. [2024-02-07 19:07:42,015 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2024-02-07 19:07:42,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69941 conditions, 40983 events. 20061/40983 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 1154. Compared 406850 event pairs, 16298 based on Foata normal form. 0/37284 useless extension candidates. Maximal degree in co-relation 69904. Up to 28815 conditions per place. [2024-02-07 19:07:42,209 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 93 selfloop transitions, 2 changer transitions 0/153 dead transitions. [2024-02-07 19:07:42,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 153 transitions, 539 flow [2024-02-07 19:07:42,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:07:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:07:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 268 transitions. [2024-02-07 19:07:42,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480572597137015 [2024-02-07 19:07:42,212 INFO L175 Difference]: Start difference. First operand has 133 places, 132 transitions, 307 flow. Second operand 3 states and 268 transitions. [2024-02-07 19:07:42,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 153 transitions, 539 flow [2024-02-07 19:07:42,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 153 transitions, 527 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-02-07 19:07:42,217 INFO L231 Difference]: Finished difference. Result has 133 places, 133 transitions, 307 flow [2024-02-07 19:07:42,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=307, PETRI_PLACES=133, PETRI_TRANSITIONS=133} [2024-02-07 19:07:42,218 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, 7 predicate places. [2024-02-07 19:07:42,218 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 133 transitions, 307 flow [2024-02-07 19:07:42,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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) [2024-02-07 19:07:42,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:42,218 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2024-02-07 19:07:42,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-07 19:07:42,218 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 21 more)] === [2024-02-07 19:07:42,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:42,219 INFO L85 PathProgramCache]: Analyzing trace with hash -969078705, now seen corresponding path program 1 times [2024-02-07 19:07:42,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:42,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806468329] [2024-02-07 19:07:42,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:42,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:42,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:42,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806468329] [2024-02-07 19:07:42,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806468329] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:07:42,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822744077] [2024-02-07 19:07:42,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:42,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:42,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:07:42,289 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) [2024-02-07 19:07:42,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 19:07:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:42,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 19:07:42,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:07:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:42,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:07:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:42,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822744077] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:07:42,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:07:42,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-02-07 19:07:42,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519036896] [2024-02-07 19:07:42,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:07:42,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 19:07:42,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:42,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 19:07:42,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-02-07 19:07:42,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 163 [2024-02-07 19:07:42,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 133 transitions, 307 flow. Second operand has 11 states, 11 states have (on average 59.0) internal successors, (649), 11 states have internal predecessors, (649), 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) [2024-02-07 19:07:42,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:42,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 163 [2024-02-07 19:07:42,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:45,444 INFO L124 PetriNetUnfolderBase]: 19281/39479 cut-off events. [2024-02-07 19:07:45,445 INFO L125 PetriNetUnfolderBase]: For 907/907 co-relation queries the response was YES. [2024-02-07 19:07:45,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68109 conditions, 39479 events. 19281/39479 cut-off events. For 907/907 co-relation queries the response was YES. Maximal size of possible extension queue 1123. Compared 390621 event pairs, 16614 based on Foata normal form. 5/36542 useless extension candidates. Maximal degree in co-relation 68038. Up to 27703 conditions per place. [2024-02-07 19:07:45,640 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 78 selfloop transitions, 10 changer transitions 0/145 dead transitions. [2024-02-07 19:07:45,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 145 transitions, 541 flow [2024-02-07 19:07:45,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:07:45,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:07:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 662 transitions. [2024-02-07 19:07:45,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40613496932515336 [2024-02-07 19:07:45,643 INFO L175 Difference]: Start difference. First operand has 133 places, 133 transitions, 307 flow. Second operand 10 states and 662 transitions. [2024-02-07 19:07:45,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 145 transitions, 541 flow [2024-02-07 19:07:45,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 145 transitions, 539 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:07:45,645 INFO L231 Difference]: Finished difference. Result has 147 places, 139 transitions, 381 flow [2024-02-07 19:07:45,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=381, PETRI_PLACES=147, PETRI_TRANSITIONS=139} [2024-02-07 19:07:45,646 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, 21 predicate places. [2024-02-07 19:07:45,646 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 139 transitions, 381 flow [2024-02-07 19:07:45,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 59.0) internal successors, (649), 11 states have internal predecessors, (649), 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) [2024-02-07 19:07:45,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:45,647 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2024-02-07 19:07:45,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-07 19:07:45,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:45,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 21 more)] === [2024-02-07 19:07:45,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:45,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1981806418, now seen corresponding path program 2 times [2024-02-07 19:07:45,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:45,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502039935] [2024-02-07 19:07:45,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:45,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:46,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:46,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502039935] [2024-02-07 19:07:46,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502039935] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:07:46,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756775456] [2024-02-07 19:07:46,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:07:46,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:46,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:07:46,055 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:07:46,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-07 19:07:46,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-07 19:07:46,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:07:46,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 32 conjunts are in the unsatisfiable core [2024-02-07 19:07:46,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:07:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-02-07 19:07:46,190 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 19:07:46,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756775456] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:07:46,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 19:07:46,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 13 [2024-02-07 19:07:46,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295054926] [2024-02-07 19:07:46,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:07:46,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:07:46,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:46,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:07:46,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:07:46,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 163 [2024-02-07 19:07:46,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 139 transitions, 381 flow. Second operand has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:07:46,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:46,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 163 [2024-02-07 19:07:46,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:49,573 INFO L124 PetriNetUnfolderBase]: 18962/35272 cut-off events. [2024-02-07 19:07:49,573 INFO L125 PetriNetUnfolderBase]: For 878/878 co-relation queries the response was YES. [2024-02-07 19:07:49,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64052 conditions, 35272 events. 18962/35272 cut-off events. For 878/878 co-relation queries the response was YES. Maximal size of possible extension queue 1083. Compared 328216 event pairs, 337 based on Foata normal form. 19/32576 useless extension candidates. Maximal degree in co-relation 63967. Up to 26989 conditions per place. [2024-02-07 19:07:49,784 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 137 selfloop transitions, 3 changer transitions 0/199 dead transitions. [2024-02-07 19:07:49,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 199 transitions, 781 flow [2024-02-07 19:07:49,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:07:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:07:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 367 transitions. [2024-02-07 19:07:49,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5628834355828221 [2024-02-07 19:07:49,786 INFO L175 Difference]: Start difference. First operand has 147 places, 139 transitions, 381 flow. Second operand 4 states and 367 transitions. [2024-02-07 19:07:49,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 199 transitions, 781 flow [2024-02-07 19:07:49,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 199 transitions, 777 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:07:49,800 INFO L231 Difference]: Finished difference. Result has 149 places, 139 transitions, 389 flow [2024-02-07 19:07:49,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=389, PETRI_PLACES=149, PETRI_TRANSITIONS=139} [2024-02-07 19:07:49,801 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, 23 predicate places. [2024-02-07 19:07:49,801 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 139 transitions, 389 flow [2024-02-07 19:07:49,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:07:49,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:49,802 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:07:49,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-07 19:07:50,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:50,015 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 21 more)] === [2024-02-07 19:07:50,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:50,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1306502089, now seen corresponding path program 1 times [2024-02-07 19:07:50,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:50,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449211881] [2024-02-07 19:07:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:50,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-02-07 19:07:50,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:50,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449211881] [2024-02-07 19:07:50,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449211881] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:07:50,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:07:50,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:07:50,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097885013] [2024-02-07 19:07:50,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:07:50,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:07:50,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:50,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:07:50,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:07:50,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 163 [2024-02-07 19:07:50,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 139 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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) [2024-02-07 19:07:50,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:50,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 163 [2024-02-07 19:07:50,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:56,656 INFO L124 PetriNetUnfolderBase]: 35836/69783 cut-off events. [2024-02-07 19:07:56,656 INFO L125 PetriNetUnfolderBase]: For 4684/4684 co-relation queries the response was YES. [2024-02-07 19:07:56,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125702 conditions, 69783 events. 35836/69783 cut-off events. For 4684/4684 co-relation queries the response was YES. Maximal size of possible extension queue 1506. Compared 709239 event pairs, 17187 based on Foata normal form. 465/65013 useless extension candidates. Maximal degree in co-relation 125617. Up to 28384 conditions per place. [2024-02-07 19:07:57,120 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 143 selfloop transitions, 2 changer transitions 0/204 dead transitions. [2024-02-07 19:07:57,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 204 transitions, 831 flow [2024-02-07 19:07:57,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:07:57,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:07:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 312 transitions. [2024-02-07 19:07:57,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6380368098159509 [2024-02-07 19:07:57,124 INFO L175 Difference]: Start difference. First operand has 149 places, 139 transitions, 389 flow. Second operand 3 states and 312 transitions. [2024-02-07 19:07:57,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 204 transitions, 831 flow [2024-02-07 19:07:57,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 204 transitions, 821 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-02-07 19:07:57,132 INFO L231 Difference]: Finished difference. Result has 150 places, 140 transitions, 397 flow [2024-02-07 19:07:57,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=397, PETRI_PLACES=150, PETRI_TRANSITIONS=140} [2024-02-07 19:07:57,133 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, 24 predicate places. [2024-02-07 19:07:57,133 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 140 transitions, 397 flow [2024-02-07 19:07:57,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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) [2024-02-07 19:07:57,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:57,134 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 19:07:57,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-07 19:07:57,134 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 21 more)] === [2024-02-07 19:07:57,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:57,134 INFO L85 PathProgramCache]: Analyzing trace with hash -314995344, now seen corresponding path program 1 times [2024-02-07 19:07:57,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:57,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433985825] [2024-02-07 19:07:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:57,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 19:07:57,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:57,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433985825] [2024-02-07 19:07:57,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433985825] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:07:57,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222358552] [2024-02-07 19:07:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:57,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:57,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:07:57,273 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:07:57,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-07 19:07:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:57,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:07:57,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:07:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 19:07:57,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:07:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 19:07:57,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222358552] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:07:57,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:07:57,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2024-02-07 19:07:57,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385723923] [2024-02-07 19:07:57,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:07:57,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:07:57,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:57,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:07:57,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:07:57,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 163 [2024-02-07 19:07:57,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 140 transitions, 397 flow. Second operand has 13 states, 13 states have (on average 59.30769230769231) internal successors, (771), 13 states have internal predecessors, (771), 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) [2024-02-07 19:07:57,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:57,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 163 [2024-02-07 19:07:57,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:08:05,159 INFO L124 PetriNetUnfolderBase]: 35621/71386 cut-off events. [2024-02-07 19:08:05,160 INFO L125 PetriNetUnfolderBase]: For 5053/5115 co-relation queries the response was YES. [2024-02-07 19:08:05,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127565 conditions, 71386 events. 35621/71386 cut-off events. For 5053/5115 co-relation queries the response was YES. Maximal size of possible extension queue 1513. Compared 739861 event pairs, 31235 based on Foata normal form. 2/66379 useless extension candidates. Maximal degree in co-relation 127448. Up to 51099 conditions per place. [2024-02-07 19:08:05,672 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 81 selfloop transitions, 12 changer transitions 0/150 dead transitions. [2024-02-07 19:08:05,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 150 transitions, 655 flow [2024-02-07 19:08:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:08:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:08:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 777 transitions. [2024-02-07 19:08:05,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39723926380368096 [2024-02-07 19:08:05,683 INFO L175 Difference]: Start difference. First operand has 150 places, 140 transitions, 397 flow. Second operand 12 states and 777 transitions. [2024-02-07 19:08:05,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 150 transitions, 655 flow [2024-02-07 19:08:05,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 150 transitions, 653 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:08:05,694 INFO L231 Difference]: Finished difference. Result has 163 places, 143 transitions, 460 flow [2024-02-07 19:08:05,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=460, PETRI_PLACES=163, PETRI_TRANSITIONS=143} [2024-02-07 19:08:05,695 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, 37 predicate places. [2024-02-07 19:08:05,695 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 143 transitions, 460 flow [2024-02-07 19:08:05,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 59.30769230769231) internal successors, (771), 13 states have internal predecessors, (771), 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) [2024-02-07 19:08:05,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:08:05,696 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 19:08:05,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-07 19:08:05,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-07 19:08:05,908 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 21 more)] === [2024-02-07 19:08:05,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:05,909 INFO L85 PathProgramCache]: Analyzing trace with hash -434435842, now seen corresponding path program 2 times [2024-02-07 19:08:05,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:05,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232037308] [2024-02-07 19:08:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:05,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-02-07 19:08:06,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:08:06,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232037308] [2024-02-07 19:08:06,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232037308] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:08:06,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107013063] [2024-02-07 19:08:06,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:08:06,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:08:06,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:08:06,147 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:08:06,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-07 19:08:06,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:08:06,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:08:06,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 19:08:06,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:08:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-02-07 19:08:06,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:08:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-02-07 19:08:06,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107013063] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:08:06,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:08:06,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-02-07 19:08:06,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631345136] [2024-02-07 19:08:06,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:08:06,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:08:06,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:08:06,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:08:06,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:08:06,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 163 [2024-02-07 19:08:06,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 143 transitions, 460 flow. Second operand has 5 states, 5 states have (on average 60.2) internal successors, (301), 5 states have internal predecessors, (301), 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) [2024-02-07 19:08:06,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:08:06,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 163 [2024-02-07 19:08:06,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand