./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bench-exp1x3.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bench-exp1x3.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 14:50:05,180 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 14:50:05,256 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 14:50:05,266 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 14:50:05,267 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 14:50:05,285 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 14:50:05,285 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 14:50:05,286 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 14:50:05,286 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 14:50:05,287 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 14:50:05,287 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 14:50:05,287 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 14:50:05,288 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 14:50:05,288 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 14:50:05,289 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 14:50:05,289 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 14:50:05,290 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 14:50:05,290 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 14:50:05,290 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 14:50:05,291 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 14:50:05,291 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 14:50:05,291 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 14:50:05,292 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 14:50:05,292 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 14:50:05,292 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 14:50:05,293 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 14:50:05,293 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 14:50:05,293 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 14:50:05,294 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 14:50:05,294 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 14:50:05,294 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 14:50:05,295 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 14:50:05,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 14:50:05,295 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 14:50:05,296 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 14:50:05,296 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 14:50:05,296 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 14:50:05,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 14:50:05,297 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 14:50:05,297 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 14:50:05,297 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 14:50:05,298 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 14:50:05,298 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 14:50:05,298 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-27 14:50:05,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 14:50:05,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 14:50:05,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 14:50:05,527 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 14:50:05,528 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 14:50:05,529 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c [2024-01-27 14:50:06,720 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 14:50:06,899 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 14:50:06,899 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c [2024-01-27 14:50:06,906 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7941da516/523da5f046a04b5f878a50bcf073c389/FLAG32e1fa72e [2024-01-27 14:50:06,922 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7941da516/523da5f046a04b5f878a50bcf073c389 [2024-01-27 14:50:06,926 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-27 14:50:06,926 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-27 14:50:06,928 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bench-exp1x3.wvr.yml/witness.yml [2024-01-27 14:50:07,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 14:50:07,048 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-27 14:50:07,049 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 14:50:07,050 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 14:50:07,054 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 14:50:07,054 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 02:50:06" (1/2) ... [2024-01-27 14:50:07,072 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33c76559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:50:07, skipping insertion in model container [2024-01-27 14:50:07,073 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 02:50:06" (1/2) ... [2024-01-27 14:50:07,075 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f4133ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:50:07, skipping insertion in model container [2024-01-27 14:50:07,075 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 02:50:07" (2/2) ... [2024-01-27 14:50:07,075 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33c76559 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:50:07, skipping insertion in model container [2024-01-27 14:50:07,076 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 02:50:07" (2/2) ... [2024-01-27 14:50:07,076 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-27 14:50:07,096 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-27 14:50:07,097 INFO L98 nessWitnessExtractor]: Location invariant after [L37-L43] n == 0U [2024-01-27 14:50:07,097 INFO L98 nessWitnessExtractor]: Location invariant before [L58-L58] n == 0U [2024-01-27 14:50:07,097 INFO L98 nessWitnessExtractor]: Location invariant before [L58-L58] x2 == 0U [2024-01-27 14:50:07,097 INFO L98 nessWitnessExtractor]: Location invariant before [L57-L57] (0LL - (long long )x1) + (long long )x2 >= 0LL [2024-01-27 14:50:07,098 INFO L98 nessWitnessExtractor]: Location invariant before [L57-L57] (0LL - (long long )x1) - (long long )x2 >= 0LL [2024-01-27 14:50:07,098 INFO L98 nessWitnessExtractor]: Location invariant before [L57-L57] x1 == 0U [2024-01-27 14:50:07,098 INFO L98 nessWitnessExtractor]: Location invariant before [L57-L57] x2 == 0U [2024-01-27 14:50:07,098 INFO L98 nessWitnessExtractor]: Location invariant before [L57-L57] (long long )x1 + (long long )x2 >= 0LL [2024-01-27 14:50:07,098 INFO L98 nessWitnessExtractor]: Location invariant before [L57-L57] (long long )x1 - (long long )x2 >= 0LL [2024-01-27 14:50:07,098 INFO L98 nessWitnessExtractor]: Location invariant before [L57-L57] n == 0U [2024-01-27 14:50:07,099 INFO L98 nessWitnessExtractor]: Location invariant before [L39-L39] (unsigned long )_argptr == 0UL [2024-01-27 14:50:07,099 INFO L98 nessWitnessExtractor]: Location invariant before [L42-L42] (unsigned long )_argptr == 0UL [2024-01-27 14:50:07,112 INFO L98 nessWitnessExtractor]: Location invariant before [L50-L50] (unsigned long )_argptr == 0UL [2024-01-27 14:50:07,112 INFO L98 nessWitnessExtractor]: Loop invariant at [L38-L40] (unsigned long )_argptr == 0UL [2024-01-27 14:50:07,112 INFO L98 nessWitnessExtractor]: Location invariant before [L59-L59] n == 0U [2024-01-27 14:50:07,112 INFO L98 nessWitnessExtractor]: Location invariant before [L47-L47] (unsigned long )_argptr == 0UL [2024-01-27 14:50:07,113 INFO L98 nessWitnessExtractor]: Loop invariant at [L46-L48] (unsigned long )_argptr == 0UL [2024-01-27 14:50:07,148 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 14:50:07,402 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c[1875,1888] [2024-01-27 14:50:07,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 14:50:07,417 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-27 14:50:07,453 WARN L424 MainDispatcher]: Unable to annotate void* thread1(void* _argptr) { while (x1 < n) { x1 = x1 + x1; } return 0; } with a witness entry Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-27 14:50:07,464 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c[1875,1888] [2024-01-27 14:50:07,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 14:50:07,479 INFO L206 MainTranslator]: Completed translation [2024-01-27 14:50:07,480 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:50:07 WrapperNode [2024-01-27 14:50:07,480 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 14:50:07,481 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 14:50:07,481 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 14:50:07,481 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 14:50:07,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:50:07" (1/1) ... [2024-01-27 14:50:07,496 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:50:07" (1/1) ... [2024-01-27 14:50:07,516 INFO L138 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2024-01-27 14:50:07,517 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 14:50:07,517 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 14:50:07,518 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 14:50:07,518 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 14:50:07,528 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:50:07" (1/1) ... [2024-01-27 14:50:07,529 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:50:07" (1/1) ... [2024-01-27 14:50:07,531 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:50:07" (1/1) ... [2024-01-27 14:50:07,544 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-27 14:50:07,544 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:50:07" (1/1) ... [2024-01-27 14:50:07,545 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:50:07" (1/1) ... [2024-01-27 14:50:07,550 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:50:07" (1/1) ... [2024-01-27 14:50:07,553 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:50:07" (1/1) ... [2024-01-27 14:50:07,554 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:50:07" (1/1) ... [2024-01-27 14:50:07,555 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:50:07" (1/1) ... [2024-01-27 14:50:07,557 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 14:50:07,558 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 14:50:07,558 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 14:50:07,558 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 14:50:07,559 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:50:07" (1/1) ... [2024-01-27 14:50:07,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 14:50:07,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:50:07,656 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 14:50:07,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 14:50:07,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 14:50:07,701 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 14:50:07,702 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 14:50:07,702 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 14:50:07,702 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 14:50:07,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 14:50:07,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 14:50:07,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 14:50:07,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 14:50:07,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 14:50:07,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 14:50:07,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 14:50:07,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 14:50:07,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 14:50:07,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 14:50:07,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 14:50:07,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 14:50:07,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 14:50:07,707 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 14:50:07,822 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 14:50:07,825 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 14:50:08,108 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 14:50:08,108 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 14:50:08,225 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 14:50:08,226 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 14:50:08,226 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 02:50:08 BoogieIcfgContainer [2024-01-27 14:50:08,226 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 14:50:08,228 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 14:50:08,228 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 14:50:08,231 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 14:50:08,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 02:50:06" (1/4) ... [2024-01-27 14:50:08,236 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8a0612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 02:50:08, skipping insertion in model container [2024-01-27 14:50:08,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 02:50:07" (2/4) ... [2024-01-27 14:50:08,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8a0612 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.01 02:50:08, skipping insertion in model container [2024-01-27 14:50:08,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:50:07" (3/4) ... [2024-01-27 14:50:08,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8a0612 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.01 02:50:08, skipping insertion in model container [2024-01-27 14:50:08,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 02:50:08" (4/4) ... [2024-01-27 14:50:08,240 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp1x3.wvr.c [2024-01-27 14:50:08,257 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 14:50:08,258 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2024-01-27 14:50:08,258 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 14:50:08,327 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 14:50:08,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 55 transitions, 124 flow [2024-01-27 14:50:08,418 INFO L124 PetriNetUnfolderBase]: 2/53 cut-off events. [2024-01-27 14:50:08,418 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 14:50:08,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 53 events. 2/53 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 83 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-01-27 14:50:08,422 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 55 transitions, 124 flow [2024-01-27 14:50:08,427 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 52 transitions, 116 flow [2024-01-27 14:50:08,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 14:50:08,440 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;@21d1e932, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 14:50:08,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-01-27 14:50:08,443 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 14:50:08,443 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-27 14:50:08,444 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 14:50:08,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:50:08,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-27 14:50:08,446 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:50:08,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:50:08,450 INFO L85 PathProgramCache]: Analyzing trace with hash 8274, now seen corresponding path program 1 times [2024-01-27 14:50:08,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:50:08,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885129637] [2024-01-27 14:50:08,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:50:08,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:50:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:50:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:50:08,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:50:08,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885129637] [2024-01-27 14:50:08,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885129637] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:50:08,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:50:08,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-27 14:50:08,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459415984] [2024-01-27 14:50:08,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:50:08,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 14:50:08,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:50:08,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 14:50:08,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 14:50:08,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 55 [2024-01-27 14:50:08,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:08,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:50:08,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 55 [2024-01-27 14:50:08,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:50:08,960 INFO L124 PetriNetUnfolderBase]: 116/258 cut-off events. [2024-01-27 14:50:08,961 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-01-27 14:50:08,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 258 events. 116/258 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1087 event pairs, 72 based on Foata normal form. 2/181 useless extension candidates. Maximal degree in co-relation 384. Up to 186 conditions per place. [2024-01-27 14:50:08,965 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 18 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2024-01-27 14:50:08,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 148 flow [2024-01-27 14:50:08,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 14:50:08,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 14:50:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-01-27 14:50:08,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6909090909090909 [2024-01-27 14:50:08,979 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 116 flow. Second operand 3 states and 114 transitions. [2024-01-27 14:50:08,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 148 flow [2024-01-27 14:50:08,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 140 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 14:50:08,985 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 104 flow [2024-01-27 14:50:08,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-01-27 14:50:08,990 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -6 predicate places. [2024-01-27 14:50:08,991 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 104 flow [2024-01-27 14:50:08,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:08,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:50:08,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-01-27 14:50:08,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 14:50:08,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:50:08,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:50:08,993 INFO L85 PathProgramCache]: Analyzing trace with hash 256781, now seen corresponding path program 1 times [2024-01-27 14:50:08,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:50:08,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5542161] [2024-01-27 14:50:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:50:08,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:50:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:50:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:50:09,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:50:09,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5542161] [2024-01-27 14:50:09,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5542161] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:50:09,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:50:09,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-27 14:50:09,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689428514] [2024-01-27 14:50:09,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:50:09,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 14:50:09,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:50:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 14:50:09,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 14:50:09,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 55 [2024-01-27 14:50:09,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:09,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:50:09,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 55 [2024-01-27 14:50:09,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:50:09,206 INFO L124 PetriNetUnfolderBase]: 49/140 cut-off events. [2024-01-27 14:50:09,207 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 14:50:09,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 140 events. 49/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 600 event pairs, 45 based on Foata normal form. 4/122 useless extension candidates. Maximal degree in co-relation 228. Up to 100 conditions per place. [2024-01-27 14:50:09,218 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 17 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-01-27 14:50:09,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 132 flow [2024-01-27 14:50:09,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 14:50:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 14:50:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-01-27 14:50:09,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6727272727272727 [2024-01-27 14:50:09,223 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 104 flow. Second operand 3 states and 111 transitions. [2024-01-27 14:50:09,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 132 flow [2024-01-27 14:50:09,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 128 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 14:50:09,225 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 94 flow [2024-01-27 14:50:09,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-01-27 14:50:09,226 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -11 predicate places. [2024-01-27 14:50:09,226 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 94 flow [2024-01-27 14:50:09,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:09,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:50:09,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:50:09,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 14:50:09,227 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:50:09,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:50:09,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1925759334, now seen corresponding path program 1 times [2024-01-27 14:50:09,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:50:09,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404697857] [2024-01-27 14:50:09,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:50:09,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:50:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:50:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:50:09,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:50:09,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404697857] [2024-01-27 14:50:09,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404697857] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:50:09,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:50:09,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 14:50:09,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481657221] [2024-01-27 14:50:09,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:50:09,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 14:50:09,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:50:09,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 14:50:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 14:50:09,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 55 [2024-01-27 14:50:09,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:09,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:50:09,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 55 [2024-01-27 14:50:09,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:50:09,384 INFO L124 PetriNetUnfolderBase]: 49/139 cut-off events. [2024-01-27 14:50:09,384 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 14:50:09,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 139 events. 49/139 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 602 event pairs, 45 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 234. Up to 98 conditions per place. [2024-01-27 14:50:09,386 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 19 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2024-01-27 14:50:09,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 42 transitions, 134 flow [2024-01-27 14:50:09,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 14:50:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 14:50:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-01-27 14:50:09,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6606060606060606 [2024-01-27 14:50:09,388 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 94 flow. Second operand 3 states and 109 transitions. [2024-01-27 14:50:09,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 42 transitions, 134 flow [2024-01-27 14:50:09,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 130 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 14:50:09,389 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 92 flow [2024-01-27 14:50:09,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-01-27 14:50:09,390 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -12 predicate places. [2024-01-27 14:50:09,390 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 92 flow [2024-01-27 14:50:09,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:09,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:50:09,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:50:09,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 14:50:09,391 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:50:09,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:50:09,392 INFO L85 PathProgramCache]: Analyzing trace with hash 494003557, now seen corresponding path program 1 times [2024-01-27 14:50:09,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:50:09,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610104186] [2024-01-27 14:50:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:50:09,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:50:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:50:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:50:09,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:50:09,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610104186] [2024-01-27 14:50:09,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610104186] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:50:09,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:50:09,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 14:50:09,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902379100] [2024-01-27 14:50:09,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:50:09,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 14:50:09,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:50:09,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 14:50:09,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 14:50:09,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 55 [2024-01-27 14:50:09,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 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) [2024-01-27 14:50:09,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:50:09,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 55 [2024-01-27 14:50:09,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:50:09,790 INFO L124 PetriNetUnfolderBase]: 68/167 cut-off events. [2024-01-27 14:50:09,791 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 14:50:09,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 167 events. 68/167 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 703 event pairs, 3 based on Foata normal form. 20/180 useless extension candidates. Maximal degree in co-relation 281. Up to 104 conditions per place. [2024-01-27 14:50:09,795 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 23 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2024-01-27 14:50:09,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 147 flow [2024-01-27 14:50:09,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 14:50:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 14:50:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2024-01-27 14:50:09,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6772727272727272 [2024-01-27 14:50:09,800 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 92 flow. Second operand 4 states and 149 transitions. [2024-01-27 14:50:09,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 147 flow [2024-01-27 14:50:09,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 143 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 14:50:09,802 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 84 flow [2024-01-27 14:50:09,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-01-27 14:50:09,804 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -15 predicate places. [2024-01-27 14:50:09,804 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 84 flow [2024-01-27 14:50:09,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 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) [2024-01-27 14:50:09,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:50:09,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:50:09,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 14:50:09,805 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:50:09,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:50:09,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2004636748, now seen corresponding path program 1 times [2024-01-27 14:50:09,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:50:09,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456314378] [2024-01-27 14:50:09,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:50:09,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:50:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:50:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:50:09,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:50:09,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456314378] [2024-01-27 14:50:09,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456314378] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:50:09,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:50:09,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 14:50:09,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241821374] [2024-01-27 14:50:09,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:50:09,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 14:50:09,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:50:09,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 14:50:09,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 14:50:09,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 55 [2024-01-27 14:50:09,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:09,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:50:09,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 55 [2024-01-27 14:50:09,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:50:10,059 INFO L124 PetriNetUnfolderBase]: 82/185 cut-off events. [2024-01-27 14:50:10,060 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 14:50:10,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 185 events. 82/185 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 692 event pairs, 9 based on Foata normal form. 20/200 useless extension candidates. Maximal degree in co-relation 308. Up to 106 conditions per place. [2024-01-27 14:50:10,062 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 26 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-01-27 14:50:10,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 151 flow [2024-01-27 14:50:10,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 14:50:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 14:50:10,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-01-27 14:50:10,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6909090909090909 [2024-01-27 14:50:10,065 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 84 flow. Second operand 4 states and 152 transitions. [2024-01-27 14:50:10,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 151 flow [2024-01-27 14:50:10,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 43 transitions, 148 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 14:50:10,068 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 77 flow [2024-01-27 14:50:10,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=77, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-01-27 14:50:10,070 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -18 predicate places. [2024-01-27 14:50:10,070 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 77 flow [2024-01-27 14:50:10,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:10,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:50:10,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:50:10,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 14:50:10,072 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:50:10,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:50:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1414194734, now seen corresponding path program 1 times [2024-01-27 14:50:10,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:50:10,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197251476] [2024-01-27 14:50:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:50:10,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:50:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:50:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:50:10,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:50:10,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197251476] [2024-01-27 14:50:10,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197251476] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:50:10,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:50:10,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 14:50:10,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903029897] [2024-01-27 14:50:10,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:50:10,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 14:50:10,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:50:10,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 14:50:10,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 14:50:10,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 55 [2024-01-27 14:50:10,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:10,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:50:10,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 55 [2024-01-27 14:50:10,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:50:10,310 INFO L124 PetriNetUnfolderBase]: 113/247 cut-off events. [2024-01-27 14:50:10,310 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-01-27 14:50:10,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 247 events. 113/247 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 990 event pairs, 24 based on Foata normal form. 1/236 useless extension candidates. Maximal degree in co-relation 437. Up to 138 conditions per place. [2024-01-27 14:50:10,312 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 25 selfloop transitions, 5 changer transitions 1/46 dead transitions. [2024-01-27 14:50:10,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 46 transitions, 168 flow [2024-01-27 14:50:10,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 14:50:10,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 14:50:10,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-01-27 14:50:10,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7757575757575758 [2024-01-27 14:50:10,313 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 77 flow. Second operand 3 states and 128 transitions. [2024-01-27 14:50:10,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 46 transitions, 168 flow [2024-01-27 14:50:10,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 46 transitions, 163 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 14:50:10,317 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 99 flow [2024-01-27 14:50:10,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-01-27 14:50:10,320 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -17 predicate places. [2024-01-27 14:50:10,320 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 99 flow [2024-01-27 14:50:10,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:10,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:50:10,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:50:10,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 14:50:10,321 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:50:10,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:50:10,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1908137283, now seen corresponding path program 1 times [2024-01-27 14:50:10,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:50:10,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713260073] [2024-01-27 14:50:10,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:50:10,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:50:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:50:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:50:10,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:50:10,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713260073] [2024-01-27 14:50:10,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713260073] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:50:10,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:50:10,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 14:50:10,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254104375] [2024-01-27 14:50:10,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:50:10,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 14:50:10,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:50:10,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 14:50:10,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 14:50:10,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 55 [2024-01-27 14:50:10,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 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) [2024-01-27 14:50:10,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:50:10,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 55 [2024-01-27 14:50:10,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:50:10,616 INFO L124 PetriNetUnfolderBase]: 175/334 cut-off events. [2024-01-27 14:50:10,616 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-01-27 14:50:10,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 732 conditions, 334 events. 175/334 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1383 event pairs, 19 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 699. Up to 98 conditions per place. [2024-01-27 14:50:10,619 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 38 selfloop transitions, 14 changer transitions 3/64 dead transitions. [2024-01-27 14:50:10,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 64 transitions, 280 flow [2024-01-27 14:50:10,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 14:50:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 14:50:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 185 transitions. [2024-01-27 14:50:10,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6727272727272727 [2024-01-27 14:50:10,621 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 99 flow. Second operand 5 states and 185 transitions. [2024-01-27 14:50:10,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 64 transitions, 280 flow [2024-01-27 14:50:10,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 64 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 14:50:10,623 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 169 flow [2024-01-27 14:50:10,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2024-01-27 14:50:10,624 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -11 predicate places. [2024-01-27 14:50:10,624 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 169 flow [2024-01-27 14:50:10,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 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) [2024-01-27 14:50:10,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:50:10,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:50:10,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 14:50:10,625 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:50:10,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:50:10,626 INFO L85 PathProgramCache]: Analyzing trace with hash -504483607, now seen corresponding path program 2 times [2024-01-27 14:50:10,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:50:10,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486421772] [2024-01-27 14:50:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:50:10,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:50:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:50:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:50:10,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:50:10,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486421772] [2024-01-27 14:50:10,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486421772] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:50:10,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:50:10,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 14:50:10,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948689073] [2024-01-27 14:50:10,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:50:10,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 14:50:10,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:50:10,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 14:50:10,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 14:50:10,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 55 [2024-01-27 14:50:10,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 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) [2024-01-27 14:50:10,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:50:10,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 55 [2024-01-27 14:50:10,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:50:10,891 INFO L124 PetriNetUnfolderBase]: 161/322 cut-off events. [2024-01-27 14:50:10,891 INFO L125 PetriNetUnfolderBase]: For 248/248 co-relation queries the response was YES. [2024-01-27 14:50:10,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 322 events. 161/322 cut-off events. For 248/248 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1302 event pairs, 24 based on Foata normal form. 12/324 useless extension candidates. Maximal degree in co-relation 849. Up to 120 conditions per place. [2024-01-27 14:50:10,894 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 42 selfloop transitions, 17 changer transitions 4/72 dead transitions. [2024-01-27 14:50:10,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 72 transitions, 393 flow [2024-01-27 14:50:10,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 14:50:10,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 14:50:10,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 188 transitions. [2024-01-27 14:50:10,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836363636363636 [2024-01-27 14:50:10,896 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 169 flow. Second operand 5 states and 188 transitions. [2024-01-27 14:50:10,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 72 transitions, 393 flow [2024-01-27 14:50:10,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 393 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 14:50:10,901 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 275 flow [2024-01-27 14:50:10,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-01-27 14:50:10,903 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2024-01-27 14:50:10,903 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 275 flow [2024-01-27 14:50:10,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 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) [2024-01-27 14:50:10,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:50:10,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:50:10,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 14:50:10,904 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:50:10,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:50:10,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1392896578, now seen corresponding path program 1 times [2024-01-27 14:50:10,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:50:10,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904415665] [2024-01-27 14:50:10,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:50:10,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:50:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:50:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:50:10,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:50:10,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904415665] [2024-01-27 14:50:10,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904415665] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:50:10,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:50:10,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 14:50:10,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686435139] [2024-01-27 14:50:10,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:50:10,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 14:50:10,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:50:10,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 14:50:10,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 14:50:11,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 55 [2024-01-27 14:50:11,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 275 flow. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:11,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:50:11,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 55 [2024-01-27 14:50:11,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:50:11,172 INFO L124 PetriNetUnfolderBase]: 157/318 cut-off events. [2024-01-27 14:50:11,173 INFO L125 PetriNetUnfolderBase]: For 813/823 co-relation queries the response was YES. [2024-01-27 14:50:11,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 318 events. 157/318 cut-off events. For 813/823 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1292 event pairs, 17 based on Foata normal form. 8/321 useless extension candidates. Maximal degree in co-relation 1055. Up to 143 conditions per place. [2024-01-27 14:50:11,176 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 44 selfloop transitions, 10 changer transitions 4/69 dead transitions. [2024-01-27 14:50:11,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 69 transitions, 469 flow [2024-01-27 14:50:11,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 14:50:11,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 14:50:11,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2024-01-27 14:50:11,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6909090909090909 [2024-01-27 14:50:11,181 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 275 flow. Second operand 5 states and 190 transitions. [2024-01-27 14:50:11,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 69 transitions, 469 flow [2024-01-27 14:50:11,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 467 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-01-27 14:50:11,187 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 320 flow [2024-01-27 14:50:11,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2024-01-27 14:50:11,189 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2024-01-27 14:50:11,189 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 320 flow [2024-01-27 14:50:11,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:11,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:50:11,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:50:11,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 14:50:11,190 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:50:11,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:50:11,190 INFO L85 PathProgramCache]: Analyzing trace with hash 317535818, now seen corresponding path program 2 times [2024-01-27 14:50:11,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:50:11,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955253701] [2024-01-27 14:50:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:50:11,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:50:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:50:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:50:11,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:50:11,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955253701] [2024-01-27 14:50:11,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955253701] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:50:11,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:50:11,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 14:50:11,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56611029] [2024-01-27 14:50:11,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:50:11,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 14:50:11,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:50:11,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 14:50:11,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 14:50:11,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 55 [2024-01-27 14:50:11,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:11,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:50:11,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 55 [2024-01-27 14:50:11,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:50:11,458 INFO L124 PetriNetUnfolderBase]: 133/279 cut-off events. [2024-01-27 14:50:11,458 INFO L125 PetriNetUnfolderBase]: For 906/906 co-relation queries the response was YES. [2024-01-27 14:50:11,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1058 conditions, 279 events. 133/279 cut-off events. For 906/906 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 989 event pairs, 28 based on Foata normal form. 10/286 useless extension candidates. Maximal degree in co-relation 995. Up to 150 conditions per place. [2024-01-27 14:50:11,461 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 43 selfloop transitions, 14 changer transitions 4/72 dead transitions. [2024-01-27 14:50:11,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 544 flow [2024-01-27 14:50:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 14:50:11,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 14:50:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2024-01-27 14:50:11,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6909090909090909 [2024-01-27 14:50:11,463 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 320 flow. Second operand 5 states and 190 transitions. [2024-01-27 14:50:11,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 544 flow [2024-01-27 14:50:11,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 517 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-01-27 14:50:11,467 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 377 flow [2024-01-27 14:50:11,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=377, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2024-01-27 14:50:11,468 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-01-27 14:50:11,468 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 377 flow [2024-01-27 14:50:11,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:11,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:50:11,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:50:11,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-27 14:50:11,470 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:50:11,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:50:11,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1622880329, now seen corresponding path program 1 times [2024-01-27 14:50:11,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:50:11,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409871466] [2024-01-27 14:50:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:50:11,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:50:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:50:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:50:11,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:50:11,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409871466] [2024-01-27 14:50:11,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409871466] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:50:11,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400656508] [2024-01-27 14:50:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:50:11,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:50:11,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:50:11,954 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 14:50:11,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 14:50:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:50:12,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 14:50:12,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:50:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:50:14,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:50:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:50:15,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400656508] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:50:15,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:50:15,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-27 14:50:15,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077567305] [2024-01-27 14:50:15,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:50:15,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 14:50:15,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:50:15,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 14:50:15,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2024-01-27 14:50:19,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:50:23,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:50:28,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.96s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:50:29,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-01-27 14:50:29,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 377 flow. Second operand has 17 states, 17 states have (on average 23.941176470588236) internal successors, (407), 17 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:29,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:50:29,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-01-27 14:50:29,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:50:34,115 INFO L124 PetriNetUnfolderBase]: 483/945 cut-off events. [2024-01-27 14:50:34,116 INFO L125 PetriNetUnfolderBase]: For 4313/4313 co-relation queries the response was YES. [2024-01-27 14:50:34,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3917 conditions, 945 events. 483/945 cut-off events. For 4313/4313 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4864 event pairs, 36 based on Foata normal form. 8/951 useless extension candidates. Maximal degree in co-relation 3849. Up to 198 conditions per place. [2024-01-27 14:50:34,123 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 117 selfloop transitions, 75 changer transitions 19/219 dead transitions. [2024-01-27 14:50:34,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 219 transitions, 1926 flow [2024-01-27 14:50:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 14:50:34,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 14:50:34,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 592 transitions. [2024-01-27 14:50:34,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381818181818182 [2024-01-27 14:50:34,126 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 377 flow. Second operand 20 states and 592 transitions. [2024-01-27 14:50:34,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 219 transitions, 1926 flow [2024-01-27 14:50:34,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 219 transitions, 1907 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-27 14:50:34,135 INFO L231 Difference]: Finished difference. Result has 91 places, 120 transitions, 1386 flow [2024-01-27 14:50:34,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1386, PETRI_PLACES=91, PETRI_TRANSITIONS=120} [2024-01-27 14:50:34,136 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 34 predicate places. [2024-01-27 14:50:34,136 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 120 transitions, 1386 flow [2024-01-27 14:50:34,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 23.941176470588236) internal successors, (407), 17 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:34,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:50:34,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:50:34,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 14:50:34,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-27 14:50:34,353 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:50:34,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:50:34,353 INFO L85 PathProgramCache]: Analyzing trace with hash 567919159, now seen corresponding path program 2 times [2024-01-27 14:50:34,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:50:34,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4957728] [2024-01-27 14:50:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:50:34,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:50:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:50:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:50:34,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:50:34,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4957728] [2024-01-27 14:50:34,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4957728] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:50:34,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595188157] [2024-01-27 14:50:34,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 14:50:34,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:50:34,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:50:34,796 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 14:50:34,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 14:50:35,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 14:50:35,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:50:35,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 14:50:35,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:50:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:50:40,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:50:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:50:41,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595188157] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:50:41,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:50:41,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-01-27 14:50:41,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938634136] [2024-01-27 14:50:41,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:50:41,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 14:50:41,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:50:41,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 14:50:41,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-01-27 14:50:46,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:50:49,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.64s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:50:49,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 55 [2024-01-27 14:50:49,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 120 transitions, 1386 flow. Second operand has 15 states, 15 states have (on average 21.2) internal successors, (318), 15 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:50:49,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:50:49,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 55 [2024-01-27 14:50:49,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:50:56,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:51:01,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:51:04,242 INFO L124 PetriNetUnfolderBase]: 825/1604 cut-off events. [2024-01-27 14:51:04,244 INFO L125 PetriNetUnfolderBase]: For 12058/12058 co-relation queries the response was YES. [2024-01-27 14:51:04,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8023 conditions, 1604 events. 825/1604 cut-off events. For 12058/12058 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 9621 event pairs, 106 based on Foata normal form. 4/1606 useless extension candidates. Maximal degree in co-relation 7963. Up to 630 conditions per place. [2024-01-27 14:51:04,263 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 158 selfloop transitions, 105 changer transitions 22/293 dead transitions. [2024-01-27 14:51:04,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 293 transitions, 3647 flow [2024-01-27 14:51:04,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 14:51:04,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 14:51:04,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 477 transitions. [2024-01-27 14:51:04,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-01-27 14:51:04,266 INFO L175 Difference]: Start difference. First operand has 91 places, 120 transitions, 1386 flow. Second operand 18 states and 477 transitions. [2024-01-27 14:51:04,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 293 transitions, 3647 flow [2024-01-27 14:51:04,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 293 transitions, 3289 flow, removed 174 selfloop flow, removed 4 redundant places. [2024-01-27 14:51:04,306 INFO L231 Difference]: Finished difference. Result has 111 places, 189 transitions, 2511 flow [2024-01-27 14:51:04,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2511, PETRI_PLACES=111, PETRI_TRANSITIONS=189} [2024-01-27 14:51:04,307 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 54 predicate places. [2024-01-27 14:51:04,307 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 189 transitions, 2511 flow [2024-01-27 14:51:04,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.2) internal successors, (318), 15 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:51:04,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:51:04,308 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:51:04,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 14:51:04,522 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,SelfDestructingSolverStorable11 [2024-01-27 14:51:04,523 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:51:04,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:51:04,524 INFO L85 PathProgramCache]: Analyzing trace with hash -391840094, now seen corresponding path program 3 times [2024-01-27 14:51:04,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:51:04,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034965232] [2024-01-27 14:51:04,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:51:04,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:51:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:51:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:51:04,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:51:04,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034965232] [2024-01-27 14:51:04,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034965232] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:51:04,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577431317] [2024-01-27 14:51:04,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 14:51:04,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:51:04,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:51:04,724 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 14:51:04,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 14:51:05,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 14:51:05,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:51:05,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 14:51:05,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:51:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:51:11,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:51:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:51:16,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577431317] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:51:16,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:51:16,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 19 [2024-01-27 14:51:16,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946110234] [2024-01-27 14:51:16,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:51:16,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 14:51:16,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:51:16,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 14:51:16,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=243, Unknown=1, NotChecked=0, Total=342 [2024-01-27 14:51:20,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:51:27,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:51:28,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:51:33,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:51:36,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:51:39,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:51:44,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:51:47,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:51:49,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:51:52,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:51:53,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-01-27 14:51:53,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 189 transitions, 2511 flow. Second operand has 19 states, 19 states have (on average 23.05263157894737) internal successors, (438), 19 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:51:53,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:51:53,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-01-27 14:51:53,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:02,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 14:52:06,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:52:10,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:52:14,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:52:15,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:52:48,940 WARN L293 SmtUtils]: Spent 18.15s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 14:52:53,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:52:58,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:53:40,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:53:44,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:53:58,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 14:54:02,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:54:06,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:54:53,983 WARN L293 SmtUtils]: Spent 7.14s on a formula simplification. DAG size of input: 51 DAG size of output: 41 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 14:55:02,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:55:04,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:55:08,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:55:20,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:55:24,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:55:28,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:55:29,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:55:31,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 14:55:36,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:55:41,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:56:28,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:56:30,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:56:35,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 14:56:38,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 14:56:44,054 INFO L124 PetriNetUnfolderBase]: 1434/2825 cut-off events. [2024-01-27 14:56:44,055 INFO L125 PetriNetUnfolderBase]: For 28817/28817 co-relation queries the response was YES. [2024-01-27 14:56:44,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14934 conditions, 2825 events. 1434/2825 cut-off events. For 28817/28817 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 18773 event pairs, 82 based on Foata normal form. 102/2925 useless extension candidates. Maximal degree in co-relation 14842. Up to 559 conditions per place. [2024-01-27 14:56:44,079 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 236 selfloop transitions, 289 changer transitions 5/539 dead transitions. [2024-01-27 14:56:44,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 539 transitions, 7050 flow [2024-01-27 14:56:44,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-01-27 14:56:44,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-01-27 14:56:44,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 1098 transitions. [2024-01-27 14:56:44,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4990909090909091 [2024-01-27 14:56:44,084 INFO L175 Difference]: Start difference. First operand has 111 places, 189 transitions, 2511 flow. Second operand 40 states and 1098 transitions. [2024-01-27 14:56:44,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 539 transitions, 7050 flow [2024-01-27 14:56:44,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 539 transitions, 6958 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-01-27 14:56:44,167 INFO L231 Difference]: Finished difference. Result has 165 places, 360 transitions, 6222 flow [2024-01-27 14:56:44,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=6222, PETRI_PLACES=165, PETRI_TRANSITIONS=360} [2024-01-27 14:56:44,168 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 108 predicate places. [2024-01-27 14:56:44,169 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 360 transitions, 6222 flow [2024-01-27 14:56:44,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 23.05263157894737) internal successors, (438), 19 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:56:44,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:56:44,169 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:56:44,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 14:56:44,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:56:44,376 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:56:44,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:56:44,377 INFO L85 PathProgramCache]: Analyzing trace with hash 110701294, now seen corresponding path program 4 times [2024-01-27 14:56:44,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:56:44,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118213096] [2024-01-27 14:56:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:56:44,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:56:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:56:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:56:44,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:56:44,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118213096] [2024-01-27 14:56:44,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118213096] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:56:44,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643980683] [2024-01-27 14:56:44,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 14:56:44,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:56:44,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:56:44,537 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 14:56:44,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 14:56:45,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 14:56:45,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:56:45,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 14:56:45,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:56:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:56:45,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:56:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:56:46,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643980683] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:56:46,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:56:46,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 15 [2024-01-27 14:56:46,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709456791] [2024-01-27 14:56:46,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:56:46,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 14:56:46,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:56:46,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 14:56:46,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-01-27 14:56:46,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 55 [2024-01-27 14:56:46,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 360 transitions, 6222 flow. Second operand has 15 states, 15 states have (on average 21.933333333333334) internal successors, (329), 15 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:56:46,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:56:46,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 55 [2024-01-27 14:56:46,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:56:48,437 INFO L124 PetriNetUnfolderBase]: 1468/2895 cut-off events. [2024-01-27 14:56:48,438 INFO L125 PetriNetUnfolderBase]: For 48174/48190 co-relation queries the response was YES. [2024-01-27 14:56:48,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18457 conditions, 2895 events. 1468/2895 cut-off events. For 48174/48190 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18971 event pairs, 149 based on Foata normal form. 34/2925 useless extension candidates. Maximal degree in co-relation 18344. Up to 1103 conditions per place. [2024-01-27 14:56:48,462 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 290 selfloop transitions, 93 changer transitions 40/431 dead transitions. [2024-01-27 14:56:48,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 431 transitions, 7849 flow [2024-01-27 14:56:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 14:56:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 14:56:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 373 transitions. [2024-01-27 14:56:48,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45212121212121215 [2024-01-27 14:56:48,465 INFO L175 Difference]: Start difference. First operand has 165 places, 360 transitions, 6222 flow. Second operand 15 states and 373 transitions. [2024-01-27 14:56:48,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 431 transitions, 7849 flow [2024-01-27 14:56:48,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 431 transitions, 7470 flow, removed 177 selfloop flow, removed 9 redundant places. [2024-01-27 14:56:48,728 INFO L231 Difference]: Finished difference. Result has 175 places, 360 transitions, 6150 flow [2024-01-27 14:56:48,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=5749, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6150, PETRI_PLACES=175, PETRI_TRANSITIONS=360} [2024-01-27 14:56:48,730 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 118 predicate places. [2024-01-27 14:56:48,730 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 360 transitions, 6150 flow [2024-01-27 14:56:48,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.933333333333334) internal successors, (329), 15 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:56:48,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:56:48,730 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:56:48,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-27 14:56:48,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:56:48,931 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:56:48,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:56:48,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1948438228, now seen corresponding path program 5 times [2024-01-27 14:56:48,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:56:48,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741757274] [2024-01-27 14:56:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:56:48,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:56:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:56:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:56:49,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:56:49,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741757274] [2024-01-27 14:56:49,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741757274] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:56:49,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059696024] [2024-01-27 14:56:49,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 14:56:49,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:56:49,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:56:49,119 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 14:56:49,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 14:56:49,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 14:56:49,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:56:49,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 14:56:49,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:56:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:56:50,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:56:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:56:51,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059696024] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:56:51,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:56:51,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 15 [2024-01-27 14:56:51,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758762186] [2024-01-27 14:56:51,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:56:51,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 14:56:51,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:56:51,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 14:56:51,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-01-27 14:56:52,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:56:54,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:56:55,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 55 [2024-01-27 14:56:55,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 360 transitions, 6150 flow. Second operand has 15 states, 15 states have (on average 21.933333333333334) internal successors, (329), 15 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:56:55,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:56:55,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 55 [2024-01-27 14:56:55,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:56:57,493 INFO L124 PetriNetUnfolderBase]: 1320/2616 cut-off events. [2024-01-27 14:56:57,493 INFO L125 PetriNetUnfolderBase]: For 43963/43979 co-relation queries the response was YES. [2024-01-27 14:56:57,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16711 conditions, 2616 events. 1320/2616 cut-off events. For 43963/43979 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16850 event pairs, 197 based on Foata normal form. 22/2634 useless extension candidates. Maximal degree in co-relation 16594. Up to 1151 conditions per place. [2024-01-27 14:56:57,510 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 323 selfloop transitions, 62 changer transitions 26/419 dead transitions. [2024-01-27 14:56:57,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 419 transitions, 7485 flow [2024-01-27 14:56:57,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 14:56:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 14:56:57,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 390 transitions. [2024-01-27 14:56:57,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-01-27 14:56:57,512 INFO L175 Difference]: Start difference. First operand has 175 places, 360 transitions, 6150 flow. Second operand 16 states and 390 transitions. [2024-01-27 14:56:57,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 419 transitions, 7485 flow [2024-01-27 14:56:57,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 419 transitions, 7297 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-01-27 14:56:57,687 INFO L231 Difference]: Finished difference. Result has 179 places, 352 transitions, 6012 flow [2024-01-27 14:56:57,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=5831, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6012, PETRI_PLACES=179, PETRI_TRANSITIONS=352} [2024-01-27 14:56:57,689 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 122 predicate places. [2024-01-27 14:56:57,689 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 352 transitions, 6012 flow [2024-01-27 14:56:57,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.933333333333334) internal successors, (329), 15 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:56:57,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:56:57,689 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:56:57,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 14:56:57,904 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,SelfDestructingSolverStorable14 [2024-01-27 14:56:57,904 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:56:57,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:56:57,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1341945740, now seen corresponding path program 6 times [2024-01-27 14:56:57,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:56:57,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223888932] [2024-01-27 14:56:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:56:57,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:56:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:56:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:56:58,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:56:58,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223888932] [2024-01-27 14:56:58,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223888932] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:56:58,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088810287] [2024-01-27 14:56:58,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 14:56:58,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:56:58,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:56:58,032 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 14:56:58,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 14:56:58,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 14:56:58,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:56:58,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 14:56:58,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:56:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:56:58,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:56:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:56:59,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088810287] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:56:59,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:56:59,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 15 [2024-01-27 14:56:59,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843179828] [2024-01-27 14:56:59,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:56:59,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 14:56:59,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:56:59,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 14:56:59,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-01-27 14:56:59,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-01-27 14:56:59,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 352 transitions, 6012 flow. Second operand has 15 states, 15 states have (on average 24.933333333333334) internal successors, (374), 15 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:56:59,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:56:59,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-01-27 14:56:59,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:57:03,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:57:06,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 14:57:10,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:57:14,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:57:18,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:57:22,248 INFO L124 PetriNetUnfolderBase]: 1235/2430 cut-off events. [2024-01-27 14:57:22,249 INFO L125 PetriNetUnfolderBase]: For 45561/45561 co-relation queries the response was YES. [2024-01-27 14:57:22,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15943 conditions, 2430 events. 1235/2430 cut-off events. For 45561/45561 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15139 event pairs, 154 based on Foata normal form. 44/2472 useless extension candidates. Maximal degree in co-relation 15826. Up to 1207 conditions per place. [2024-01-27 14:57:22,271 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 243 selfloop transitions, 188 changer transitions 0/439 dead transitions. [2024-01-27 14:57:22,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 439 transitions, 7757 flow [2024-01-27 14:57:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 14:57:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 14:57:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 520 transitions. [2024-01-27 14:57:22,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49760765550239233 [2024-01-27 14:57:22,274 INFO L175 Difference]: Start difference. First operand has 179 places, 352 transitions, 6012 flow. Second operand 19 states and 520 transitions. [2024-01-27 14:57:22,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 439 transitions, 7757 flow [2024-01-27 14:57:22,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 439 transitions, 7676 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-01-27 14:57:22,481 INFO L231 Difference]: Finished difference. Result has 188 places, 363 transitions, 6839 flow [2024-01-27 14:57:22,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=5721, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6839, PETRI_PLACES=188, PETRI_TRANSITIONS=363} [2024-01-27 14:57:22,482 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 131 predicate places. [2024-01-27 14:57:22,482 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 363 transitions, 6839 flow [2024-01-27 14:57:22,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 24.933333333333334) internal successors, (374), 15 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:57:22,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:57:22,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:57:22,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 14:57:22,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 14:57:22,688 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:57:22,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:57:22,689 INFO L85 PathProgramCache]: Analyzing trace with hash -98463315, now seen corresponding path program 7 times [2024-01-27 14:57:22,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:57:22,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784830504] [2024-01-27 14:57:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:57:22,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:57:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:57:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:57:22,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:57:22,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784830504] [2024-01-27 14:57:22,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784830504] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:57:22,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101055821] [2024-01-27 14:57:22,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 14:57:22,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:57:22,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:57:22,831 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) [2024-01-27 14:57:22,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 14:57:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:57:22,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 14:57:22,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:57:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:57:23,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:57:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:57:23,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101055821] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:57:23,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:57:23,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 15 [2024-01-27 14:57:23,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191055980] [2024-01-27 14:57:23,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:57:23,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 14:57:23,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:57:23,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 14:57:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-01-27 14:57:24,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-01-27 14:57:24,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 363 transitions, 6839 flow. Second operand has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:57:24,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:57:24,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-01-27 14:57:24,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:57:28,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 14:57:32,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:57:34,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:57:42,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 14:57:46,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:57:48,108 INFO L124 PetriNetUnfolderBase]: 1284/2518 cut-off events. [2024-01-27 14:57:48,108 INFO L125 PetriNetUnfolderBase]: For 57330/57330 co-relation queries the response was YES. [2024-01-27 14:57:48,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18231 conditions, 2518 events. 1284/2518 cut-off events. For 57330/57330 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15710 event pairs, 220 based on Foata normal form. 30/2546 useless extension candidates. Maximal degree in co-relation 18109. Up to 1590 conditions per place. [2024-01-27 14:57:48,129 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 266 selfloop transitions, 163 changer transitions 2/439 dead transitions. [2024-01-27 14:57:48,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 439 transitions, 8868 flow [2024-01-27 14:57:48,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 14:57:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 14:57:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 459 transitions. [2024-01-27 14:57:48,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-01-27 14:57:48,167 INFO L175 Difference]: Start difference. First operand has 188 places, 363 transitions, 6839 flow. Second operand 17 states and 459 transitions. [2024-01-27 14:57:48,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 439 transitions, 8868 flow [2024-01-27 14:57:48,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 439 transitions, 8593 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-01-27 14:57:48,403 INFO L231 Difference]: Finished difference. Result has 197 places, 377 transitions, 7483 flow [2024-01-27 14:57:48,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=6449, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7483, PETRI_PLACES=197, PETRI_TRANSITIONS=377} [2024-01-27 14:57:48,404 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 140 predicate places. [2024-01-27 14:57:48,404 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 377 transitions, 7483 flow [2024-01-27 14:57:48,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:57:48,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:57:48,405 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:57:48,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 14:57:48,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:57:48,606 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 14:57:48,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:57:48,606 INFO L85 PathProgramCache]: Analyzing trace with hash 409506696, now seen corresponding path program 8 times [2024-01-27 14:57:48,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:57:48,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325780480] [2024-01-27 14:57:48,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:57:48,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:57:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:57:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:57:49,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:57:49,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325780480] [2024-01-27 14:57:49,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325780480] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:57:49,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779028451] [2024-01-27 14:57:49,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 14:57:49,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:57:49,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:57:49,303 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) [2024-01-27 14:57:49,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 14:57:49,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 14:57:49,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:57:49,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 14:57:49,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:58:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:58:01,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:58:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:58:01,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779028451] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:58:01,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:58:01,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-01-27 14:58:01,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186452623] [2024-01-27 14:58:01,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:58:01,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 14:58:01,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:58:01,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 14:58:01,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=386, Unknown=1, NotChecked=0, Total=506 [2024-01-27 14:58:09,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:58:11,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:58:12,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 55 [2024-01-27 14:58:12,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 377 transitions, 7483 flow. Second operand has 23 states, 23 states have (on average 20.695652173913043) internal successors, (476), 23 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:58:12,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:58:12,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 55 [2024-01-27 14:58:12,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:58:27,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:58:44,686 WARN L293 SmtUtils]: Spent 12.82s on a formula simplification. DAG size of input: 79 DAG size of output: 46 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 14:58:48,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.75s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:58:53,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:59:08,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:59:15,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 14:59:16,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:59:18,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:59:29,031 WARN L293 SmtUtils]: Spent 7.38s on a formula simplification. DAG size of input: 97 DAG size of output: 67 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 14:59:30,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:59:34,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.73s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:59:39,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:59:46,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:59:50,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:59:54,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:59:57,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 14:59:59,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:00:03,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:00:05,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:00:09,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:00:17,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:00:21,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:00:28,204 INFO L124 PetriNetUnfolderBase]: 2545/5004 cut-off events. [2024-01-27 15:00:28,205 INFO L125 PetriNetUnfolderBase]: For 145616/145616 co-relation queries the response was YES. [2024-01-27 15:00:28,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37396 conditions, 5004 events. 2545/5004 cut-off events. For 145616/145616 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 36066 event pairs, 214 based on Foata normal form. 31/5033 useless extension candidates. Maximal degree in co-relation 37272. Up to 1461 conditions per place. [2024-01-27 15:00:28,245 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 362 selfloop transitions, 506 changer transitions 27/903 dead transitions. [2024-01-27 15:00:28,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 903 transitions, 17695 flow [2024-01-27 15:00:28,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-01-27 15:00:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-01-27 15:00:28,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 1261 transitions. [2024-01-27 15:00:28,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46790352504638216 [2024-01-27 15:00:28,249 INFO L175 Difference]: Start difference. First operand has 197 places, 377 transitions, 7483 flow. Second operand 49 states and 1261 transitions. [2024-01-27 15:00:28,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 903 transitions, 17695 flow [2024-01-27 15:00:29,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 903 transitions, 17251 flow, removed 45 selfloop flow, removed 11 redundant places. [2024-01-27 15:00:29,055 INFO L231 Difference]: Finished difference. Result has 255 places, 643 transitions, 14661 flow [2024-01-27 15:00:29,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=7192, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=14661, PETRI_PLACES=255, PETRI_TRANSITIONS=643} [2024-01-27 15:00:29,056 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 198 predicate places. [2024-01-27 15:00:29,056 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 643 transitions, 14661 flow [2024-01-27 15:00:29,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 20.695652173913043) internal successors, (476), 23 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:00:29,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:00:29,057 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:00:29,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-01-27 15:00:29,257 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,SelfDestructingSolverStorable17 [2024-01-27 15:00:29,258 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 15:00:29,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:00:29,258 INFO L85 PathProgramCache]: Analyzing trace with hash 859224545, now seen corresponding path program 9 times [2024-01-27 15:00:29,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:00:29,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986171235] [2024-01-27 15:00:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:00:29,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:00:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:00:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:00:32,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:00:32,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986171235] [2024-01-27 15:00:32,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986171235] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:00:32,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968891896] [2024-01-27 15:00:32,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:00:32,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:00:32,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:00:32,679 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) [2024-01-27 15:00:32,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:00:32,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:00:32,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:00:32,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:00:32,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:00:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:00:33,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:00:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:00:38,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968891896] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:00:38,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:00:38,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 8] total 20 [2024-01-27 15:00:38,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465986139] [2024-01-27 15:00:38,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:00:38,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:00:38,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:00:38,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:00:38,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=322, Unknown=1, NotChecked=0, Total=380 [2024-01-27 15:00:41,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:00:48,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:00:49,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 55 [2024-01-27 15:00:49,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 643 transitions, 14661 flow. Second operand has 20 states, 20 states have (on average 21.2) internal successors, (424), 20 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:00:49,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:00:49,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 55 [2024-01-27 15:00:49,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:00:55,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:01:06,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:01:18,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:01:35,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:01:39,500 INFO L124 PetriNetUnfolderBase]: 2479/4834 cut-off events. [2024-01-27 15:01:39,500 INFO L125 PetriNetUnfolderBase]: For 175817/175817 co-relation queries the response was YES. [2024-01-27 15:01:39,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39914 conditions, 4834 events. 2479/4834 cut-off events. For 175817/175817 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 34169 event pairs, 174 based on Foata normal form. 42/4874 useless extension candidates. Maximal degree in co-relation 39764. Up to 1911 conditions per place. [2024-01-27 15:01:39,539 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 159 selfloop transitions, 573 changer transitions 33/773 dead transitions. [2024-01-27 15:01:39,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 773 transitions, 18002 flow [2024-01-27 15:01:39,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-27 15:01:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-27 15:01:39,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 725 transitions. [2024-01-27 15:01:39,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252199413489736 [2024-01-27 15:01:39,603 INFO L175 Difference]: Start difference. First operand has 255 places, 643 transitions, 14661 flow. Second operand 31 states and 725 transitions. [2024-01-27 15:01:39,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 773 transitions, 18002 flow [2024-01-27 15:01:40,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 773 transitions, 17736 flow, removed 111 selfloop flow, removed 14 redundant places. [2024-01-27 15:01:40,393 INFO L231 Difference]: Finished difference. Result has 276 places, 688 transitions, 17590 flow [2024-01-27 15:01:40,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=13991, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=17590, PETRI_PLACES=276, PETRI_TRANSITIONS=688} [2024-01-27 15:01:40,403 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 219 predicate places. [2024-01-27 15:01:40,403 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 688 transitions, 17590 flow [2024-01-27 15:01:40,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 21.2) internal successors, (424), 20 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:01:40,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:01:40,404 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:01:40,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:01:40,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:01:40,618 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-27 15:01:40,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:01:40,619 INFO L85 PathProgramCache]: Analyzing trace with hash -449471278, now seen corresponding path program 10 times [2024-01-27 15:01:40,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:01:40,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381544633] [2024-01-27 15:01:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:01:40,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:01:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:01:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:01:43,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:01:43,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381544633] [2024-01-27 15:01:43,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381544633] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:01:43,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725177763] [2024-01-27 15:01:43,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:01:43,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:01:43,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:01:43,048 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:01:43,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:01:43,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:01:43,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:01:43,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:01:43,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:02:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:02:14,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:02:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:02:30,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725177763] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:02:30,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:02:30,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2024-01-27 15:02:30,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211478543] [2024-01-27 15:02:30,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:02:30,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:02:30,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:02:30,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:02:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=516, Unknown=6, NotChecked=0, Total=650 [2024-01-27 15:02:33,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:02:35,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:02:40,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:02:45,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:02:49,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:02:51,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:02:55,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:02:57,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:03:01,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:03:06,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:03:11,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:03:15,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:03:15,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 55 [2024-01-27 15:03:15,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 688 transitions, 17590 flow. Second operand has 26 states, 26 states have (on average 20.307692307692307) internal successors, (528), 26 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:03:15,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:03:15,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 55 [2024-01-27 15:03:15,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:03:23,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:03:25,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:03:43,734 WARN L293 SmtUtils]: Spent 8.10s on a formula simplification. DAG size of input: 74 DAG size of output: 65 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:03:46,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:04:20,617 WARN L293 SmtUtils]: Spent 30.75s on a formula simplification. DAG size of input: 102 DAG size of output: 84 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:04:22,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:04:23,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] Killed by 15