./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 59af5db6 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-59af5db-m [2024-02-02 09:18:49,086 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-02 09:18:49,156 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-02 09:18:49,161 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-02 09:18:49,162 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-02 09:18:49,186 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-02 09:18:49,187 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-02 09:18:49,187 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-02 09:18:49,188 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-02 09:18:49,191 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-02 09:18:49,192 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-02 09:18:49,192 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-02 09:18:49,193 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-02 09:18:49,194 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-02 09:18:49,194 INFO L153 SettingsManager]: * Use SBE=true [2024-02-02 09:18:49,195 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-02 09:18:49,195 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-02 09:18:49,195 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-02 09:18:49,195 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-02 09:18:49,195 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-02 09:18:49,196 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-02 09:18:49,196 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-02 09:18:49,196 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-02 09:18:49,196 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-02 09:18:49,197 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-02 09:18:49,197 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-02 09:18:49,197 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-02 09:18:49,197 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-02 09:18:49,198 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-02 09:18:49,198 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-02 09:18:49,199 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-02 09:18:49,199 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-02 09:18:49,199 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:18:49,199 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-02 09:18:49,200 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-02 09:18:49,200 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-02 09:18:49,200 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-02 09:18:49,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-02 09:18:49,200 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-02 09:18:49,200 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-02 09:18:49,201 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-02 09:18:49,201 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-02 09:18:49,201 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-02 09:18:49,201 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-02 09:18:49,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-02 09:18:49,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-02 09:18:49,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-02 09:18:49,453 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-02 09:18:49,454 INFO L274 PluginConnector]: CDTParser initialized [2024-02-02 09:18:49,455 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c [2024-02-02 09:18:50,589 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-02 09:18:50,765 INFO L384 CDTParser]: Found 1 translation units. [2024-02-02 09:18:50,766 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c [2024-02-02 09:18:50,775 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d0e776d7/a24a785fc3ab4cf8b295dd206e1ba5f2/FLAG40c89b458 [2024-02-02 09:18:50,789 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d0e776d7/a24a785fc3ab4cf8b295dd206e1ba5f2 [2024-02-02 09:18:50,791 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-02 09:18:50,792 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-02 09:18:50,794 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bench-exp1x3.wvr.yml/witness.yml [2024-02-02 09:18:50,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-02 09:18:50,873 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-02 09:18:50,874 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-02 09:18:50,874 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-02 09:18:50,922 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-02 09:18:50,922 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:18:50" (1/2) ... [2024-02-02 09:18:50,923 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fbc923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:18:50, skipping insertion in model container [2024-02-02 09:18:50,923 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:18:50" (1/2) ... [2024-02-02 09:18:50,925 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@212138f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:18:50, skipping insertion in model container [2024-02-02 09:18:50,925 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:18:50" (2/2) ... [2024-02-02 09:18:50,925 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fbc923 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:50, skipping insertion in model container [2024-02-02 09:18:50,925 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:18:50" (2/2) ... [2024-02-02 09:18:50,925 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-02 09:18:50,942 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-02 09:18:50,943 INFO L101 nessWitnessExtractor]: Loop invariant at [L46-L48] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,943 INFO L101 nessWitnessExtractor]: Location invariant before [L42-L42] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,943 INFO L101 nessWitnessExtractor]: Location invariant before [L58-L58] (x2 == 0U) && (n == 0U) [2024-02-02 09:18:50,943 INFO L101 nessWitnessExtractor]: Location invariant before [L39-L39] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,943 INFO L101 nessWitnessExtractor]: Loop invariant at [L38-L40] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,944 INFO L101 nessWitnessExtractor]: Location invariant after [L37-L43] n == 0U [2024-02-02 09:18:50,944 INFO L101 nessWitnessExtractor]: Location invariant before [L59-L59] n == 0U [2024-02-02 09:18:50,944 INFO L101 nessWitnessExtractor]: Location invariant before [L57-L57] (((((((0LL - (long long )x1) + (long long )x2 >= 0LL) && ((long long )x1 + (long long )x2 >= 0LL)) && ((0LL - (long long )x1) - (long long )x2 >= 0LL)) && ((long long )x1 - (long long )x2 >= 0LL)) && (x1 == 0U)) && (x2 == 0U)) && (n == 0U) [2024-02-02 09:18:50,944 INFO L101 nessWitnessExtractor]: Location invariant before [L47-L47] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,944 INFO L101 nessWitnessExtractor]: Location invariant before [L50-L50] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,962 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-02 09:18:51,117 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] [2024-02-02 09:18:51,123 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:18:51,133 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-02 09:18:51,165 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 [2024-02-02 09:18:51,178 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] [2024-02-02 09:18:51,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:18:51,197 INFO L206 MainTranslator]: Completed translation [2024-02-02 09:18:51,198 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:51 WrapperNode [2024-02-02 09:18:51,198 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-02 09:18:51,199 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-02 09:18:51,199 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-02 09:18:51,199 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-02 09:18:51,205 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 02.02 09:18:51" (1/1) ... [2024-02-02 09:18:51,219 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 02.02 09:18:51" (1/1) ... [2024-02-02 09:18:51,237 INFO L138 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2024-02-02 09:18:51,238 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-02 09:18:51,239 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-02 09:18:51,239 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-02 09:18:51,239 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-02 09:18:51,248 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:51" (1/1) ... [2024-02-02 09:18:51,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:51" (1/1) ... [2024-02-02 09:18:51,256 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:51" (1/1) ... [2024-02-02 09:18:51,279 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]. [2024-02-02 09:18:51,280 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:51" (1/1) ... [2024-02-02 09:18:51,280 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:51" (1/1) ... [2024-02-02 09:18:51,288 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:51" (1/1) ... [2024-02-02 09:18:51,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:51" (1/1) ... [2024-02-02 09:18:51,300 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:51" (1/1) ... [2024-02-02 09:18:51,304 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:51" (1/1) ... [2024-02-02 09:18:51,306 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-02 09:18:51,307 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-02 09:18:51,309 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-02 09:18:51,309 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-02 09:18:51,310 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:51" (1/1) ... [2024-02-02 09:18:51,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:18:51,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:18:51,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-02 09:18:51,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-02 09:18:51,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-02 09:18:51,390 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-02 09:18:51,390 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-02 09:18:51,390 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-02 09:18:51,390 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-02 09:18:51,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-02 09:18:51,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-02 09:18:51,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-02 09:18:51,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-02 09:18:51,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-02 09:18:51,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-02 09:18:51,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-02 09:18:51,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-02 09:18:51,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-02 09:18:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-02 09:18:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-02 09:18:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-02 09:18:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-02 09:18:51,394 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-02 09:18:51,481 INFO L244 CfgBuilder]: Building ICFG [2024-02-02 09:18:51,483 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-02 09:18:51,654 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-02 09:18:51,654 INFO L293 CfgBuilder]: Performing block encoding [2024-02-02 09:18:51,751 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-02 09:18:51,752 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-02 09:18:51,752 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:18:51 BoogieIcfgContainer [2024-02-02 09:18:51,752 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-02 09:18:51,754 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-02 09:18:51,754 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-02 09:18:51,756 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-02 09:18:51,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 09:18:50" (1/4) ... [2024-02-02 09:18:51,757 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ec7009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 09:18:51, skipping insertion in model container [2024-02-02 09:18:51,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:18:50" (2/4) ... [2024-02-02 09:18:51,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ec7009 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 09:18:51, skipping insertion in model container [2024-02-02 09:18:51,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:51" (3/4) ... [2024-02-02 09:18:51,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ec7009 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 09:18:51, skipping insertion in model container [2024-02-02 09:18:51,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:18:51" (4/4) ... [2024-02-02 09:18:51,759 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp1x3.wvr.c [2024-02-02 09:18:51,774 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-02 09:18:51,774 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-02-02 09:18:51,774 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-02 09:18:51,840 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-02 09:18:51,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 41 transitions, 96 flow [2024-02-02 09:18:51,901 INFO L124 PetriNetUnfolderBase]: 2/39 cut-off events. [2024-02-02 09:18:51,901 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-02 09:18:51,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 39 events. 2/39 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 76 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-02-02 09:18:51,904 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 41 transitions, 96 flow [2024-02-02 09:18:51,907 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 38 transitions, 88 flow [2024-02-02 09:18:51,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 09:18:51,927 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;@73db6335, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 09:18:51,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-02-02 09:18:51,931 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 09:18:51,932 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-02 09:18:51,932 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:18:51,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:51,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-02 09:18:51,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:18:51,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:51,937 INFO L85 PathProgramCache]: Analyzing trace with hash 8268, now seen corresponding path program 1 times [2024-02-02 09:18:51,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:51,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735975627] [2024-02-02 09:18:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:51,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:52,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:52,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735975627] [2024-02-02 09:18:52,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735975627] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:52,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:52,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 09:18:52,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120575822] [2024-02-02 09:18:52,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:52,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:18:52,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:52,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:18:52,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:18:52,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-02-02 09:18:52,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:52,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:52,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-02-02 09:18:52,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:52,475 INFO L124 PetriNetUnfolderBase]: 116/247 cut-off events. [2024-02-02 09:18:52,475 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-02-02 09:18:52,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 247 events. 116/247 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1085 event pairs, 72 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 384. Up to 190 conditions per place. [2024-02-02 09:18:52,481 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 20 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-02-02 09:18:52,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 130 flow [2024-02-02 09:18:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:18:52,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:18:52,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-02-02 09:18:52,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-02-02 09:18:52,493 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 88 flow. Second operand 3 states and 74 transitions. [2024-02-02 09:18:52,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 130 flow [2024-02-02 09:18:52,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 122 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-02 09:18:52,498 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 82 flow [2024-02-02 09:18:52,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2024-02-02 09:18:52,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2024-02-02 09:18:52,503 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 82 flow [2024-02-02 09:18:52,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:52,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:52,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-02 09:18:52,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-02 09:18:52,505 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:18:52,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:52,507 INFO L85 PathProgramCache]: Analyzing trace with hash 256537, now seen corresponding path program 1 times [2024-02-02 09:18:52,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:52,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045049440] [2024-02-02 09:18:52,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:52,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:52,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:52,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045049440] [2024-02-02 09:18:52,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045049440] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:52,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:52,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 09:18:52,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326371977] [2024-02-02 09:18:52,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:52,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:18:52,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:52,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:18:52,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:18:52,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-02-02 09:18:52,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:52,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:52,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-02-02 09:18:52,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:52,655 INFO L124 PetriNetUnfolderBase]: 116/246 cut-off events. [2024-02-02 09:18:52,656 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-02 09:18:52,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 246 events. 116/246 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1081 event pairs, 72 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 437. Up to 188 conditions per place. [2024-02-02 09:18:52,660 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 19 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2024-02-02 09:18:52,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 122 flow [2024-02-02 09:18:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:18:52,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:18:52,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-02-02 09:18:52,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-02-02 09:18:52,666 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 82 flow. Second operand 3 states and 76 transitions. [2024-02-02 09:18:52,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 122 flow [2024-02-02 09:18:52,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 36 transitions, 118 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:18:52,671 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 80 flow [2024-02-02 09:18:52,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-02-02 09:18:52,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2024-02-02 09:18:52,672 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 80 flow [2024-02-02 09:18:52,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:52,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:52,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-02-02 09:18:52,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-02 09:18:52,673 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:18:52,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:52,674 INFO L85 PathProgramCache]: Analyzing trace with hash 7952871, now seen corresponding path program 1 times [2024-02-02 09:18:52,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:52,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306574619] [2024-02-02 09:18:52,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:52,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:52,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:52,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306574619] [2024-02-02 09:18:52,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306574619] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:52,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:52,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 09:18:52,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842228534] [2024-02-02 09:18:52,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:52,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:18:52,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:52,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:18:52,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:18:52,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 41 [2024-02-02 09:18:52,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:52,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:52,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 41 [2024-02-02 09:18:52,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:52,766 INFO L124 PetriNetUnfolderBase]: 116/245 cut-off events. [2024-02-02 09:18:52,766 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-02 09:18:52,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 245 events. 116/245 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1099 event pairs, 72 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 433. Up to 186 conditions per place. [2024-02-02 09:18:52,768 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 18 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-02-02 09:18:52,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 118 flow [2024-02-02 09:18:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:18:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:18:52,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-02-02 09:18:52,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-02-02 09:18:52,770 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 80 flow. Second operand 3 states and 78 transitions. [2024-02-02 09:18:52,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 118 flow [2024-02-02 09:18:52,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:18:52,771 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 78 flow [2024-02-02 09:18:52,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2024-02-02 09:18:52,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -5 predicate places. [2024-02-02 09:18:52,772 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 78 flow [2024-02-02 09:18:52,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:52,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:52,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:18:52,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-02 09:18:52,773 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:18:52,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:52,774 INFO L85 PathProgramCache]: Analyzing trace with hash 701062874, now seen corresponding path program 1 times [2024-02-02 09:18:52,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:52,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794275722] [2024-02-02 09:18:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:52,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:52,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:52,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794275722] [2024-02-02 09:18:52,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794275722] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:52,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:52,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:18:52,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85049144] [2024-02-02 09:18:52,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:52,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:18:52,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:52,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:18:52,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:18:52,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-02-02 09:18:52,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:52,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:52,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-02-02 09:18:52,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:52,932 INFO L124 PetriNetUnfolderBase]: 68/160 cut-off events. [2024-02-02 09:18:52,933 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:18:52,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 160 events. 68/160 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 688 event pairs, 3 based on Foata normal form. 20/173 useless extension candidates. Maximal degree in co-relation 279. Up to 104 conditions per place. [2024-02-02 09:18:52,934 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 23 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-02-02 09:18:52,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 133 flow [2024-02-02 09:18:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:18:52,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:18:52,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-02-02 09:18:52,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-02-02 09:18:52,936 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 78 flow. Second operand 4 states and 97 transitions. [2024-02-02 09:18:52,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 37 transitions, 133 flow [2024-02-02 09:18:52,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 129 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:18:52,937 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 70 flow [2024-02-02 09:18:52,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-02-02 09:18:52,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -8 predicate places. [2024-02-02 09:18:52,938 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 70 flow [2024-02-02 09:18:52,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:52,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:52,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:18:52,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-02 09:18:52,939 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:18:52,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:52,939 INFO L85 PathProgramCache]: Analyzing trace with hash -589308369, now seen corresponding path program 1 times [2024-02-02 09:18:52,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:52,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580049932] [2024-02-02 09:18:52,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:52,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:53,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:53,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580049932] [2024-02-02 09:18:53,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580049932] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:53,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:53,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:18:53,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660423607] [2024-02-02 09:18:53,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:53,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:18:53,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:53,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:18:53,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:18:53,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-02-02 09:18:53,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:53,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:53,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-02-02 09:18:53,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:53,124 INFO L124 PetriNetUnfolderBase]: 82/178 cut-off events. [2024-02-02 09:18:53,124 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-02 09:18:53,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 178 events. 82/178 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 679 event pairs, 9 based on Foata normal form. 20/193 useless extension candidates. Maximal degree in co-relation 308. Up to 106 conditions per place. [2024-02-02 09:18:53,125 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 26 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2024-02-02 09:18:53,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 137 flow [2024-02-02 09:18:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:18:53,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:18:53,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-02-02 09:18:53,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-02-02 09:18:53,127 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 70 flow. Second operand 4 states and 100 transitions. [2024-02-02 09:18:53,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 137 flow [2024-02-02 09:18:53,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:18:53,128 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 63 flow [2024-02-02 09:18:53,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=63, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2024-02-02 09:18:53,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2024-02-02 09:18:53,129 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 63 flow [2024-02-02 09:18:53,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:53,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:53,130 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] [2024-02-02 09:18:53,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-02 09:18:53,130 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:18:53,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:53,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1245992271, now seen corresponding path program 1 times [2024-02-02 09:18:53,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:53,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158958430] [2024-02-02 09:18:53,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:53,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:53,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:53,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158958430] [2024-02-02 09:18:53,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158958430] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:53,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:53,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:18:53,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177474247] [2024-02-02 09:18:53,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:53,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:18:53,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:53,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:18:53,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:18:53,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 41 [2024-02-02 09:18:53,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:53,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:53,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 41 [2024-02-02 09:18:53,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:53,292 INFO L124 PetriNetUnfolderBase]: 113/240 cut-off events. [2024-02-02 09:18:53,292 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-02-02 09:18:53,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 240 events. 113/240 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. 1/227 useless extension candidates. Maximal degree in co-relation 437. Up to 138 conditions per place. [2024-02-02 09:18:53,293 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 24 selfloop transitions, 5 changer transitions 1/39 dead transitions. [2024-02-02 09:18:53,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 152 flow [2024-02-02 09:18:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:18:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:18:53,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-02-02 09:18:53,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7886178861788617 [2024-02-02 09:18:53,295 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 63 flow. Second operand 3 states and 97 transitions. [2024-02-02 09:18:53,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 152 flow [2024-02-02 09:18:53,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 39 transitions, 147 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:18:53,296 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 85 flow [2024-02-02 09:18:53,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2024-02-02 09:18:53,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -10 predicate places. [2024-02-02 09:18:53,297 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 85 flow [2024-02-02 09:18:53,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:53,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:53,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:18:53,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-02 09:18:53,297 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:18:53,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:53,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1094094752, now seen corresponding path program 1 times [2024-02-02 09:18:53,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:53,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649863469] [2024-02-02 09:18:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:53,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:53,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:53,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649863469] [2024-02-02 09:18:53,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649863469] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:53,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:53,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 09:18:53,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75468056] [2024-02-02 09:18:53,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:53,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:18:53,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:53,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:18:53,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:18:53,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 41 [2024-02-02 09:18:53,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:53,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:53,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 41 [2024-02-02 09:18:53,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:53,457 INFO L124 PetriNetUnfolderBase]: 175/327 cut-off events. [2024-02-02 09:18:53,457 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-02-02 09:18:53,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 327 events. 175/327 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1379 event pairs, 19 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 699. Up to 97 conditions per place. [2024-02-02 09:18:53,459 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 35 selfloop transitions, 12 changer transitions 3/57 dead transitions. [2024-02-02 09:18:53,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 256 flow [2024-02-02 09:18:53,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:18:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:18:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-02-02 09:18:53,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7317073170731707 [2024-02-02 09:18:53,464 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 85 flow. Second operand 5 states and 150 transitions. [2024-02-02 09:18:53,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 256 flow [2024-02-02 09:18:53,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:18:53,465 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 149 flow [2024-02-02 09:18:53,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-02-02 09:18:53,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2024-02-02 09:18:53,466 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 149 flow [2024-02-02 09:18:53,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:53,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:53,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:18:53,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-02 09:18:53,467 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:18:53,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:53,467 INFO L85 PathProgramCache]: Analyzing trace with hash 972814994, now seen corresponding path program 2 times [2024-02-02 09:18:53,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:53,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573929572] [2024-02-02 09:18:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:53,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:53,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:53,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573929572] [2024-02-02 09:18:53,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573929572] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:53,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:53,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 09:18:53,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128159880] [2024-02-02 09:18:53,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:53,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:18:53,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:53,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:18:53,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:18:53,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 41 [2024-02-02 09:18:53,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:53,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:53,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 41 [2024-02-02 09:18:53,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:53,642 INFO L124 PetriNetUnfolderBase]: 161/315 cut-off events. [2024-02-02 09:18:53,643 INFO L125 PetriNetUnfolderBase]: For 249/249 co-relation queries the response was YES. [2024-02-02 09:18:53,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 315 events. 161/315 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1313 event pairs, 24 based on Foata normal form. 12/315 useless extension candidates. Maximal degree in co-relation 849. Up to 119 conditions per place. [2024-02-02 09:18:53,645 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 39 selfloop transitions, 15 changer transitions 4/65 dead transitions. [2024-02-02 09:18:53,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 65 transitions, 363 flow [2024-02-02 09:18:53,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:18:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:18:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-02-02 09:18:53,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7463414634146341 [2024-02-02 09:18:53,646 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 149 flow. Second operand 5 states and 153 transitions. [2024-02-02 09:18:53,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 65 transitions, 363 flow [2024-02-02 09:18:53,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 363 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-02 09:18:53,648 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 247 flow [2024-02-02 09:18:53,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=247, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-02-02 09:18:53,648 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-02-02 09:18:53,648 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 247 flow [2024-02-02 09:18:53,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:53,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:53,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:18:53,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-02 09:18:53,649 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:18:53,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:53,649 INFO L85 PathProgramCache]: Analyzing trace with hash -610175777, now seen corresponding path program 1 times [2024-02-02 09:18:53,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:53,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732774827] [2024-02-02 09:18:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:53,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:53,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:53,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732774827] [2024-02-02 09:18:53,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732774827] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:53,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:53,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 09:18:53,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057387723] [2024-02-02 09:18:53,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:53,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:18:53,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:53,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:18:53,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:18:53,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 41 [2024-02-02 09:18:53,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:53,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:53,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 41 [2024-02-02 09:18:53,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:53,818 INFO L124 PetriNetUnfolderBase]: 157/311 cut-off events. [2024-02-02 09:18:53,818 INFO L125 PetriNetUnfolderBase]: For 809/817 co-relation queries the response was YES. [2024-02-02 09:18:53,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 311 events. 157/311 cut-off events. For 809/817 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1300 event pairs, 17 based on Foata normal form. 8/312 useless extension candidates. Maximal degree in co-relation 1055. Up to 143 conditions per place. [2024-02-02 09:18:53,820 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 41 selfloop transitions, 10 changer transitions 4/62 dead transitions. [2024-02-02 09:18:53,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 62 transitions, 435 flow [2024-02-02 09:18:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:18:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:18:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-02-02 09:18:53,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7170731707317073 [2024-02-02 09:18:53,821 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 247 flow. Second operand 5 states and 147 transitions. [2024-02-02 09:18:53,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 62 transitions, 435 flow [2024-02-02 09:18:53,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 62 transitions, 433 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-02-02 09:18:53,825 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 292 flow [2024-02-02 09:18:53,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=292, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2024-02-02 09:18:53,825 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-02-02 09:18:53,825 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 292 flow [2024-02-02 09:18:53,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:53,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:53,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:18:53,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-02 09:18:53,826 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:18:53,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:53,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1989891993, now seen corresponding path program 2 times [2024-02-02 09:18:53,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:53,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150992164] [2024-02-02 09:18:53,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:53,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:53,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:53,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150992164] [2024-02-02 09:18:53,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150992164] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:53,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:53,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 09:18:53,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713336151] [2024-02-02 09:18:53,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:53,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:18:53,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:53,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:18:53,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:18:53,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 41 [2024-02-02 09:18:53,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 292 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:53,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:53,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 41 [2024-02-02 09:18:53,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:54,046 INFO L124 PetriNetUnfolderBase]: 133/272 cut-off events. [2024-02-02 09:18:54,046 INFO L125 PetriNetUnfolderBase]: For 898/898 co-relation queries the response was YES. [2024-02-02 09:18:54,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 272 events. 133/272 cut-off events. For 898/898 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 985 event pairs, 28 based on Foata normal form. 10/277 useless extension candidates. Maximal degree in co-relation 995. Up to 150 conditions per place. [2024-02-02 09:18:54,048 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 40 selfloop transitions, 14 changer transitions 4/65 dead transitions. [2024-02-02 09:18:54,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 510 flow [2024-02-02 09:18:54,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:18:54,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:18:54,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-02-02 09:18:54,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7170731707317073 [2024-02-02 09:18:54,053 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 292 flow. Second operand 5 states and 147 transitions. [2024-02-02 09:18:54,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 510 flow [2024-02-02 09:18:54,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 491 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-02-02 09:18:54,056 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 357 flow [2024-02-02 09:18:54,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=357, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2024-02-02 09:18:54,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-02-02 09:18:54,057 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 357 flow [2024-02-02 09:18:54,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:54,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:54,057 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] [2024-02-02 09:18:54,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-02 09:18:54,057 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:18:54,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:54,058 INFO L85 PathProgramCache]: Analyzing trace with hash -871232890, now seen corresponding path program 1 times [2024-02-02 09:18:54,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:54,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458403070] [2024-02-02 09:18:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:54,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:54,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:54,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458403070] [2024-02-02 09:18:54,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458403070] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:18:54,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486685069] [2024-02-02 09:18:54,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:54,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:18:54,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:18:54,469 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:18:54,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-02 09:18:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:54,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-02 09:18:54,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:19:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:00,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:19:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:01,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486685069] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:19:01,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:19:01,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-02-02 09:19:01,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099984400] [2024-02-02 09:19:01,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:19:01,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-02 09:19:01,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:19:01,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-02 09:19:01,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2024-02-02 09:19:04,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 41 [2024-02-02 09:19:04,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 357 flow. Second operand has 17 states, 17 states have (on average 22.58823529411765) internal successors, (384), 17 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:04,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:19:04,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 41 [2024-02-02 09:19:04,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:19:08,586 INFO L124 PetriNetUnfolderBase]: 483/938 cut-off events. [2024-02-02 09:19:08,586 INFO L125 PetriNetUnfolderBase]: For 4418/4418 co-relation queries the response was YES. [2024-02-02 09:19:08,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3927 conditions, 938 events. 483/938 cut-off events. For 4418/4418 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4896 event pairs, 36 based on Foata normal form. 8/943 useless extension candidates. Maximal degree in co-relation 3877. Up to 198 conditions per place. [2024-02-02 09:19:08,593 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 112 selfloop transitions, 74 changer transitions 19/212 dead transitions. [2024-02-02 09:19:08,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 212 transitions, 1904 flow [2024-02-02 09:19:08,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-02 09:19:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-02 09:19:08,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 566 transitions. [2024-02-02 09:19:08,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6902439024390243 [2024-02-02 09:19:08,595 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 357 flow. Second operand 20 states and 566 transitions. [2024-02-02 09:19:08,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 212 transitions, 1904 flow [2024-02-02 09:19:08,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 212 transitions, 1887 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-02-02 09:19:08,610 INFO L231 Difference]: Finished difference. Result has 84 places, 113 transitions, 1374 flow [2024-02-02 09:19:08,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1374, PETRI_PLACES=84, PETRI_TRANSITIONS=113} [2024-02-02 09:19:08,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-02-02 09:19:08,616 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 113 transitions, 1374 flow [2024-02-02 09:19:08,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.58823529411765) internal successors, (384), 17 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:08,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:19:08,617 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] [2024-02-02 09:19:08,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-02 09:19:08,829 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 [2024-02-02 09:19:08,830 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:19:08,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:19:08,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1197696258, now seen corresponding path program 2 times [2024-02-02 09:19:08,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:19:08,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747766760] [2024-02-02 09:19:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:19:08,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:19:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:19:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:09,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:19:09,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747766760] [2024-02-02 09:19:09,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747766760] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:19:09,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846249089] [2024-02-02 09:19:09,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-02 09:19:09,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:19:09,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:19:09,213 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:19:09,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-02 09:19:09,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-02 09:19:09,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:19:09,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-02 09:19:09,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:19:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:17,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:19:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:17,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846249089] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:19:17,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:19:17,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-02-02 09:19:17,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181099977] [2024-02-02 09:19:17,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:19:17,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-02 09:19:17,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:19:17,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-02 09:19:17,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=197, Unknown=1, NotChecked=0, Total=272 [2024-02-02 09:19:19,711 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 [] [2024-02-02 09:19:21,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-02-02 09:19:21,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 113 transitions, 1374 flow. Second operand has 17 states, 17 states have (on average 19.470588235294116) internal successors, (331), 17 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:21,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:19:21,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-02-02 09:19:21,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:19:26,983 INFO L124 PetriNetUnfolderBase]: 857/1627 cut-off events. [2024-02-02 09:19:26,983 INFO L125 PetriNetUnfolderBase]: For 13562/13562 co-relation queries the response was YES. [2024-02-02 09:19:26,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8411 conditions, 1627 events. 857/1627 cut-off events. For 13562/13562 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 9751 event pairs, 78 based on Foata normal form. 7/1631 useless extension candidates. Maximal degree in co-relation 8356. Up to 529 conditions per place. [2024-02-02 09:19:26,994 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 144 selfloop transitions, 160 changer transitions 15/326 dead transitions. [2024-02-02 09:19:26,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 326 transitions, 4123 flow [2024-02-02 09:19:27,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-02 09:19:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-02 09:19:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 577 transitions. [2024-02-02 09:19:27,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118769883351007 [2024-02-02 09:19:27,010 INFO L175 Difference]: Start difference. First operand has 84 places, 113 transitions, 1374 flow. Second operand 23 states and 577 transitions. [2024-02-02 09:19:27,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 326 transitions, 4123 flow [2024-02-02 09:19:27,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 326 transitions, 3687 flow, removed 213 selfloop flow, removed 4 redundant places. [2024-02-02 09:19:27,041 INFO L231 Difference]: Finished difference. Result has 110 places, 219 transitions, 3108 flow [2024-02-02 09:19:27,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3108, PETRI_PLACES=110, PETRI_TRANSITIONS=219} [2024-02-02 09:19:27,044 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-02-02 09:19:27,044 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 219 transitions, 3108 flow [2024-02-02 09:19:27,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.470588235294116) internal successors, (331), 17 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:27,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:19:27,045 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] [2024-02-02 09:19:27,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-02 09:19:27,259 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 [2024-02-02 09:19:27,260 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:19:27,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:19:27,260 INFO L85 PathProgramCache]: Analyzing trace with hash 27902899, now seen corresponding path program 3 times [2024-02-02 09:19:27,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:19:27,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470405394] [2024-02-02 09:19:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:19:27,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:19:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:19:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:27,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:19:27,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470405394] [2024-02-02 09:19:27,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470405394] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:19:27,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218804963] [2024-02-02 09:19:27,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-02 09:19:27,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:19:27,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:19:27,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:19:27,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-02 09:19:27,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-02 09:19:27,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:19:27,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-02 09:19:27,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:19:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:33,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:19:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:34,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218804963] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:19:34,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:19:34,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 16 [2024-02-02 09:19:34,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508835340] [2024-02-02 09:19:34,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:19:34,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-02 09:19:34,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:19:34,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-02 09:19:34,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=178, Unknown=1, NotChecked=0, Total=240 [2024-02-02 09:19:38,756 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 [] [2024-02-02 09:19:40,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:19:44,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:19:44,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-02-02 09:19:44,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 219 transitions, 3108 flow. Second operand has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:44,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:19:44,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-02-02 09:19:44,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:19:48,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:19:52,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:19:56,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:20:03,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:20:17,127 INFO L124 PetriNetUnfolderBase]: 1308/2519 cut-off events. [2024-02-02 09:20:17,127 INFO L125 PetriNetUnfolderBase]: For 31407/31407 co-relation queries the response was YES. [2024-02-02 09:20:17,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14254 conditions, 2519 events. 1308/2519 cut-off events. For 31407/31407 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 15885 event pairs, 72 based on Foata normal form. 139/2655 useless extension candidates. Maximal degree in co-relation 14180. Up to 554 conditions per place. [2024-02-02 09:20:17,153 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 202 changer transitions 4/462 dead transitions. [2024-02-02 09:20:17,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 462 transitions, 6691 flow [2024-02-02 09:20:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-02 09:20:17,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-02 09:20:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 726 transitions. [2024-02-02 09:20:17,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6105971404541631 [2024-02-02 09:20:17,159 INFO L175 Difference]: Start difference. First operand has 110 places, 219 transitions, 3108 flow. Second operand 29 states and 726 transitions. [2024-02-02 09:20:17,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 462 transitions, 6691 flow [2024-02-02 09:20:17,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 462 transitions, 6563 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-02-02 09:20:17,238 INFO L231 Difference]: Finished difference. Result has 147 places, 311 transitions, 5321 flow [2024-02-02 09:20:17,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2802, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5321, PETRI_PLACES=147, PETRI_TRANSITIONS=311} [2024-02-02 09:20:17,239 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-02-02 09:20:17,240 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 311 transitions, 5321 flow [2024-02-02 09:20:17,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:20:17,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:20:17,241 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] [2024-02-02 09:20:17,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-02-02 09:20:17,451 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 [2024-02-02 09:20:17,452 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:20:17,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:20:17,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1980384248, now seen corresponding path program 4 times [2024-02-02 09:20:17,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:20:17,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237884393] [2024-02-02 09:20:17,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:20:17,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:20:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:20:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:20:17,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:20:17,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237884393] [2024-02-02 09:20:17,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237884393] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:20:17,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649661960] [2024-02-02 09:20:17,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-02 09:20:17,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:20:17,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:20:17,575 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:20:17,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-02 09:20:17,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-02 09:20:17,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:20:17,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-02 09:20:17,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:20:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:20:18,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:20:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:20:18,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649661960] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:20:18,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:20:18,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 18 [2024-02-02 09:20:18,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202193350] [2024-02-02 09:20:18,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:20:18,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-02 09:20:18,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:20:18,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-02 09:20:18,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-02-02 09:20:19,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 41 [2024-02-02 09:20:19,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 311 transitions, 5321 flow. Second operand has 18 states, 18 states have (on average 23.055555555555557) internal successors, (415), 18 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:20:19,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:20:19,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 41 [2024-02-02 09:20:19,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:20:21,749 INFO L124 PetriNetUnfolderBase]: 1474/2921 cut-off events. [2024-02-02 09:20:21,750 INFO L125 PetriNetUnfolderBase]: For 53529/53529 co-relation queries the response was YES. [2024-02-02 09:20:21,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18953 conditions, 2921 events. 1474/2921 cut-off events. For 53529/53529 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 19521 event pairs, 116 based on Foata normal form. 16/2934 useless extension candidates. Maximal degree in co-relation 18862. Up to 1219 conditions per place. [2024-02-02 09:20:21,784 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 272 selfloop transitions, 164 changer transitions 5/448 dead transitions. [2024-02-02 09:20:21,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 448 transitions, 7624 flow [2024-02-02 09:20:21,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-02 09:20:21,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-02 09:20:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 599 transitions. [2024-02-02 09:20:21,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.664079822616408 [2024-02-02 09:20:21,786 INFO L175 Difference]: Start difference. First operand has 147 places, 311 transitions, 5321 flow. Second operand 22 states and 599 transitions. [2024-02-02 09:20:21,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 448 transitions, 7624 flow [2024-02-02 09:20:21,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 448 transitions, 7420 flow, removed 91 selfloop flow, removed 8 redundant places. [2024-02-02 09:20:21,959 INFO L231 Difference]: Finished difference. Result has 166 places, 336 transitions, 6152 flow [2024-02-02 09:20:21,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5137, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6152, PETRI_PLACES=166, PETRI_TRANSITIONS=336} [2024-02-02 09:20:21,960 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-02-02 09:20:21,960 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 336 transitions, 6152 flow [2024-02-02 09:20:21,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 23.055555555555557) internal successors, (415), 18 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:20:21,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:20:21,961 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] [2024-02-02 09:20:21,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-02-02 09:20:22,173 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 [2024-02-02 09:20:22,173 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:20:22,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:20:22,173 INFO L85 PathProgramCache]: Analyzing trace with hash 659483017, now seen corresponding path program 5 times [2024-02-02 09:20:22,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:20:22,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046710051] [2024-02-02 09:20:22,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:20:22,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:20:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:20:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:20:22,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:20:22,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046710051] [2024-02-02 09:20:22,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046710051] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:20:22,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832557014] [2024-02-02 09:20:22,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-02 09:20:22,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:20:22,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:20:22,277 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:20:22,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-02 09:20:22,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-02 09:20:22,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:20:22,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-02 09:20:22,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:20:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:20:39,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:20:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:20:52,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832557014] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:20:52,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:20:52,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 16 [2024-02-02 09:20:52,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644627159] [2024-02-02 09:20:52,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:20:52,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-02 09:20:52,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:20:52,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-02 09:20:52,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=181, Unknown=7, NotChecked=0, Total=240 [2024-02-02 09:20:56,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:21:00,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:21:02,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:21:07,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:21:08,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:21:08,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-02-02 09:21:08,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 336 transitions, 6152 flow. Second operand has 16 states, 16 states have (on average 20.5625) internal successors, (329), 16 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:21:08,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:21:08,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-02-02 09:21:08,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:21:12,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:21:16,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:21:20,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:21:24,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:21:28,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:21:48,268 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 [] [2024-02-02 09:21:51,819 INFO L124 PetriNetUnfolderBase]: 1722/3436 cut-off events. [2024-02-02 09:21:51,820 INFO L125 PetriNetUnfolderBase]: For 72940/72940 co-relation queries the response was YES. [2024-02-02 09:21:51,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23232 conditions, 3436 events. 1722/3436 cut-off events. For 72940/72940 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 23629 event pairs, 208 based on Foata normal form. 48/3481 useless extension candidates. Maximal degree in co-relation 23136. Up to 1397 conditions per place. [2024-02-02 09:21:51,847 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 250 selfloop transitions, 223 changer transitions 3/483 dead transitions. [2024-02-02 09:21:51,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 483 transitions, 9058 flow [2024-02-02 09:21:51,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-02 09:21:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-02 09:21:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 471 transitions. [2024-02-02 09:21:51,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046213093709885 [2024-02-02 09:21:51,849 INFO L175 Difference]: Start difference. First operand has 166 places, 336 transitions, 6152 flow. Second operand 19 states and 471 transitions. [2024-02-02 09:21:51,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 483 transitions, 9058 flow [2024-02-02 09:21:52,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 483 transitions, 8721 flow, removed 112 selfloop flow, removed 12 redundant places. [2024-02-02 09:21:52,053 INFO L231 Difference]: Finished difference. Result has 181 places, 378 transitions, 7703 flow [2024-02-02 09:21:52,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5683, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7703, PETRI_PLACES=181, PETRI_TRANSITIONS=378} [2024-02-02 09:21:52,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-02-02 09:21:52,055 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 378 transitions, 7703 flow [2024-02-02 09:21:52,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.5625) internal successors, (329), 16 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) [2024-02-02 09:21:52,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:21:52,055 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] [2024-02-02 09:21:52,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-02 09:21:52,267 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 [2024-02-02 09:21:52,267 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:21:52,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:21:52,268 INFO L85 PathProgramCache]: Analyzing trace with hash 626225265, now seen corresponding path program 6 times [2024-02-02 09:21:52,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:21:52,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563334562] [2024-02-02 09:21:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:21:52,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:21:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:21:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:21:52,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:21:52,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563334562] [2024-02-02 09:21:52,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563334562] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:21:52,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987003669] [2024-02-02 09:21:52,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-02 09:21:52,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:21:52,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:21:52,467 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:21:52,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-02 09:21:52,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-02 09:21:52,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:21:52,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-02 09:21:52,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:49,167 WARN L293 SmtUtils]: Spent 12.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-02-02 09:23:05,181 WARN L293 SmtUtils]: Spent 16.01s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-02-02 09:23:29,952 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~n~0 4294967296)) (.cse1 (mod (* (div (* (- 1) c_~x2~0) 2) 4294967295) 4294967296)) (.cse2 (mod (* 4294967295 (div (* (- 1) c_~x1~0) 2)) 4294967296))) (and (= (mod c_~x2~0 2) 0) (= (mod c_~x1~0 2) 0) (<= (+ (mod c_~x1~0 4294967296) 1) .cse0) (<= .cse0 (mod c_~x2~0 4294967296)) (<= (+ .cse1 1) .cse0) (<= 1 .cse2) (= .cse1 .cse2))) is different from false [2024-02-02 09:23:45,974 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-02-02 09:24:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2024-02-02 09:24:00,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:24:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:24:38,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987003669] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:24:38,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:24:38,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 19 [2024-02-02 09:24:38,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850070581] [2024-02-02 09:24:38,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:24:38,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-02 09:24:38,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:24:38,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-02 09:24:38,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=218, Unknown=17, NotChecked=32, Total=342 [2024-02-02 09:24:38,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-02-02 09:24:38,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 378 transitions, 7703 flow. Second operand has 19 states, 19 states have (on average 19.842105263157894) internal successors, (377), 19 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:24:38,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:24:38,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-02-02 09:24:38,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:24:43,355 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 [] [2024-02-02 09:24:46,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:24:51,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:24:59,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:25:03,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:25:07,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:25:10,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.96s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:25:32,702 WARN L293 SmtUtils]: Spent 8.78s on a formula simplification. DAG size of input: 53 DAG size of output: 45 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-02 09:25:47,694 WARN L293 SmtUtils]: Spent 10.53s on a formula simplification. DAG size of input: 39 DAG size of output: 28 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-02 09:26:11,962 INFO L124 PetriNetUnfolderBase]: 1940/3827 cut-off events. [2024-02-02 09:26:11,962 INFO L125 PetriNetUnfolderBase]: For 95313/95313 co-relation queries the response was YES. [2024-02-02 09:26:11,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28504 conditions, 3827 events. 1940/3827 cut-off events. For 95313/95313 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 26713 event pairs, 120 based on Foata normal form. 31/3855 useless extension candidates. Maximal degree in co-relation 28404. Up to 925 conditions per place. [2024-02-02 09:26:12,020 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 183 selfloop transitions, 400 changer transitions 27/617 dead transitions. [2024-02-02 09:26:12,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 617 transitions, 12645 flow [2024-02-02 09:26:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-02-02 09:26:12,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-02-02 09:26:12,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 866 transitions. [2024-02-02 09:26:12,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708635464733026 [2024-02-02 09:26:12,035 INFO L175 Difference]: Start difference. First operand has 181 places, 378 transitions, 7703 flow. Second operand 37 states and 866 transitions. [2024-02-02 09:26:12,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 617 transitions, 12645 flow [2024-02-02 09:26:12,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 617 transitions, 12318 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-02-02 09:26:12,326 INFO L231 Difference]: Finished difference. Result has 214 places, 474 transitions, 10656 flow [2024-02-02 09:26:12,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7062, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10656, PETRI_PLACES=214, PETRI_TRANSITIONS=474} [2024-02-02 09:26:12,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-02-02 09:26:12,327 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 474 transitions, 10656 flow [2024-02-02 09:26:12,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.842105263157894) internal successors, (377), 19 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:26:12,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:26:12,328 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] [2024-02-02 09:26:12,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-02 09:26:12,539 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 [2024-02-02 09:26:12,539 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:26:12,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:26:12,540 INFO L85 PathProgramCache]: Analyzing trace with hash -807427036, now seen corresponding path program 7 times [2024-02-02 09:26:12,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:26:12,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095328857] [2024-02-02 09:26:12,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:26:12,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:26:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:26:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:26:12,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:26:12,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095328857] [2024-02-02 09:26:12,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095328857] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:26:12,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889039551] [2024-02-02 09:26:12,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-02 09:26:12,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:26:12,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:26:12,642 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:26:12,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-02 09:26:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:26:12,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-02 09:26:12,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:26:47,795 WARN L293 SmtUtils]: Spent 7.82s on a formula simplification. DAG size of input: 10 DAG size of output: 1 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-02-02 09:26:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:26:47,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:26:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:26:55,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889039551] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:26:55,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:26:55,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 10] total 20 [2024-02-02 09:26:55,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085998126] [2024-02-02 09:26:55,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:26:55,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-02 09:26:55,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:26:55,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-02 09:26:55,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-02-02 09:27:02,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:04,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:08,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:08,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 41 [2024-02-02 09:27:08,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 474 transitions, 10656 flow. Second operand has 20 states, 20 states have (on average 21.75) internal successors, (435), 20 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:27:08,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:27:08,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 41 [2024-02-02 09:27:08,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:27:11,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:15,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:16,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:46,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:28:12,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:28:13,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:28:16,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:28:20,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:28:21,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:28:37,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:28:57,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:01,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:04,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:06,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:09,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:14,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:19,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:22,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:25,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:39,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:43,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:47,391 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 [] [2024-02-02 09:29:55,687 INFO L124 PetriNetUnfolderBase]: 2511/4994 cut-off events. [2024-02-02 09:29:55,688 INFO L125 PetriNetUnfolderBase]: For 155397/155397 co-relation queries the response was YES. [2024-02-02 09:29:55,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39936 conditions, 4994 events. 2511/4994 cut-off events. For 155397/155397 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 36706 event pairs, 68 based on Foata normal form. 95/5086 useless extension candidates. Maximal degree in co-relation 39830. Up to 1064 conditions per place. [2024-02-02 09:29:55,734 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 358 selfloop transitions, 474 changer transitions 9/848 dead transitions. [2024-02-02 09:29:55,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 848 transitions, 18537 flow [2024-02-02 09:29:55,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-02-02 09:29:55,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-02-02 09:29:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 1109 transitions. [2024-02-02 09:29:55,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440185830429733 [2024-02-02 09:29:55,737 INFO L175 Difference]: Start difference. First operand has 214 places, 474 transitions, 10656 flow. Second operand 42 states and 1109 transitions. [2024-02-02 09:29:55,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 848 transitions, 18537 flow [2024-02-02 09:29:56,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 848 transitions, 17424 flow, removed 393 selfloop flow, removed 14 redundant places. [2024-02-02 09:29:56,246 INFO L231 Difference]: Finished difference. Result has 256 places, 644 transitions, 15947 flow [2024-02-02 09:29:56,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9404, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=15947, PETRI_PLACES=256, PETRI_TRANSITIONS=644} [2024-02-02 09:29:56,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-02-02 09:29:56,247 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 644 transitions, 15947 flow [2024-02-02 09:29:56,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 21.75) internal successors, (435), 20 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:29:56,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:29:56,247 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] [2024-02-02 09:29:56,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-02 09:29:56,459 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 [2024-02-02 09:29:56,460 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:29:56,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:29:56,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2042498802, now seen corresponding path program 8 times [2024-02-02 09:29:56,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:29:56,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644732023] [2024-02-02 09:29:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:29:56,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:29:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:29:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:29:57,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:29:57,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644732023] [2024-02-02 09:29:57,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644732023] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:29:57,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768132205] [2024-02-02 09:29:57,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-02 09:29:57,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:29:57,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:29:57,722 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:29:57,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-02 09:29:58,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-02 09:29:58,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:29:58,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-02 09:29:58,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:30:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-02 09:30:11,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:30:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-02 09:30:12,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768132205] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:30:12,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:30:12,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 8] total 19 [2024-02-02 09:30:12,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103449893] [2024-02-02 09:30:12,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:30:12,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-02 09:30:12,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:30:12,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-02 09:30:12,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=282, Unknown=1, NotChecked=0, Total=342 [2024-02-02 09:30:13,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-02-02 09:30:13,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 644 transitions, 15947 flow. Second operand has 19 states, 19 states have (on average 19.842105263157894) internal successors, (377), 19 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:30:13,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:30:13,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-02-02 09:30:13,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:30:28,470 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 [] [2024-02-02 09:30:33,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:30:37,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:30:41,580 INFO L124 PetriNetUnfolderBase]: 2466/4892 cut-off events. [2024-02-02 09:30:41,580 INFO L125 PetriNetUnfolderBase]: For 171889/171889 co-relation queries the response was YES. [2024-02-02 09:30:41,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42002 conditions, 4892 events. 2466/4892 cut-off events. For 171889/171889 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 35281 event pairs, 240 based on Foata normal form. 12/4901 useless extension candidates. Maximal degree in co-relation 41880. Up to 2044 conditions per place. [2024-02-02 09:30:41,661 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 517 selfloop transitions, 152 changer transitions 33/709 dead transitions. [2024-02-02 09:30:41,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 709 transitions, 17970 flow [2024-02-02 09:30:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-02 09:30:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-02 09:30:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 451 transitions. [2024-02-02 09:30:41,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-02-02 09:30:41,664 INFO L175 Difference]: Start difference. First operand has 256 places, 644 transitions, 15947 flow. Second operand 20 states and 451 transitions. [2024-02-02 09:30:41,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 709 transitions, 17970 flow [2024-02-02 09:30:42,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 709 transitions, 17191 flow, removed 202 selfloop flow, removed 10 redundant places. [2024-02-02 09:30:42,528 INFO L231 Difference]: Finished difference. Result has 265 places, 639 transitions, 15435 flow [2024-02-02 09:30:42,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15055, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=15435, PETRI_PLACES=265, PETRI_TRANSITIONS=639} [2024-02-02 09:30:42,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-02-02 09:30:42,530 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 639 transitions, 15435 flow [2024-02-02 09:30:42,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.842105263157894) internal successors, (377), 19 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:30:42,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:30:42,531 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] [2024-02-02 09:30:42,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-02 09:30:42,752 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 [2024-02-02 09:30:42,752 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-02 09:30:42,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:30:42,753 INFO L85 PathProgramCache]: Analyzing trace with hash 973898845, now seen corresponding path program 9 times [2024-02-02 09:30:42,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:30:42,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216949722] [2024-02-02 09:30:42,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:30:42,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:30:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:30:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:30:43,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:30:43,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216949722] [2024-02-02 09:30:43,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216949722] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:30:43,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160148603] [2024-02-02 09:30:43,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-02 09:30:43,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:30:43,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:30:43,602 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:30:43,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-02 09:30:44,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-02 09:30:44,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:30:44,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-02 09:30:44,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:30:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:30:58,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:31:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:31:20,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160148603] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:31:20,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:31:20,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 25 [2024-02-02 09:31:20,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449552912] [2024-02-02 09:31:20,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:31:20,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-02 09:31:20,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:31:20,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-02 09:31:20,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=482, Unknown=2, NotChecked=0, Total=600 [2024-02-02 09:31:26,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:31:30,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:31:33,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:31:36,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:31:38,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:31:44,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:31:47,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:31:48,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:31:51,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:31:56,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:31:57,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 41 [2024-02-02 09:31:57,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 639 transitions, 15435 flow. Second operand has 25 states, 25 states have (on average 21.24) internal successors, (531), 25 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:31:57,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:31:57,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 41 [2024-02-02 09:31:57,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:32:13,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:32:17,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:32:20,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:32:24,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:32:36,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:32:49,028 WARN L293 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 101 DAG size of output: 65 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-02 09:32:53,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:32:54,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:32:59,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:33:03,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.68s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:33:11,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:33:13,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:33:14,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:33:17,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:33:19,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] Killed by 15