./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/triangular-longer-1.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/triangular-longer-1.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 16:40:53,670 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:40:53,755 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:40:53,760 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:40:53,760 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:40:53,789 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:40:53,790 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:40:53,790 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:40:53,791 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:40:53,794 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:40:53,794 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:40:53,794 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:40:53,795 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:40:53,796 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:40:53,797 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:40:53,797 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:40:53,797 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:40:53,797 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:40:53,798 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:40:53,798 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:40:53,798 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:40:53,798 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:40:53,799 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:40:53,799 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:40:53,799 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:40:53,799 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:40:53,799 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:40:53,800 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:40:53,800 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:40:53,801 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:40:53,801 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:40:53,801 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:40:53,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:40:53,802 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:40:53,802 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:40:53,802 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:40:53,803 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:40:53,803 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:40:53,803 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:40:53,803 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:40:53,803 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:40:53,804 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:40:53,804 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:40:53,804 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:40:54,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:40:54,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:40:54,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:40:54,025 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:40:54,025 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:40:54,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2024-01-31 16:40:55,142 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:40:55,369 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:40:55,372 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2024-01-31 16:40:55,387 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6874e1755/01d9860490a84e51a662c61e0f232169/FLAG8e144fda1 [2024-01-31 16:40:55,402 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6874e1755/01d9860490a84e51a662c61e0f232169 [2024-01-31 16:40:55,405 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:40:55,405 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:40:55,406 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/triangular-longer-1.yml/witness.yml [2024-01-31 16:40:55,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:40:55,544 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:40:55,545 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:40:55,546 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:40:55,549 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:40:55,550 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:40:55" (1/2) ... [2024-01-31 16:40:55,551 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19d23581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:55, skipping insertion in model container [2024-01-31 16:40:55,551 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:40:55" (1/2) ... [2024-01-31 16:40:55,553 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3702f92b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:55, skipping insertion in model container [2024-01-31 16:40:55,553 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:55" (2/2) ... [2024-01-31 16:40:55,554 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19d23581 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:55, skipping insertion in model container [2024-01-31 16:40:55,554 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:55" (2/2) ... [2024-01-31 16:40:55,554 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:40:55,699 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:40:55,700 INFO L98 nessWitnessExtractor]: Location invariant before [L722-L722] (((((0 <= condI) && (0 <= condJ)) && (condI <= 1)) && (condJ <= 1)) && (condI == 0 || condI == 1)) && (condJ == 0 || condJ == 1) [2024-01-31 16:40:55,701 INFO L98 nessWitnessExtractor]: Location invariant after [L719-L719] ((((((0 <= condI) && (3 <= i)) && (4 <= j)) && (condI <= 1)) && (i % 2 == 1)) && (j % 2 == 0)) && (condI == 0 || condI == 1) [2024-01-31 16:40:55,701 INFO L98 nessWitnessExtractor]: Location invariant after [L716-L716] (((((((3 <= i) && (4 <= j)) && ((4294967296LL + (long long )condI) + (long long )condJ >= 0LL)) && ((4294967295LL - (long long )condI) + (long long )condJ >= 0LL)) && ((4294967295LL + (long long )condI) - (long long )condJ >= 0LL)) && ((4294967294LL - (long long )condI) - (long long )condJ >= 0LL)) && (i % 2 == 1)) && (j % 2 == 0) [2024-01-31 16:40:55,740 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:40:56,053 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2024-01-31 16:40:56,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:40:56,068 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:40:56,121 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:40:56,124 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:40:56,126 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] Start Parsing Local [2024-01-31 16:40:56,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:40:56,177 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:40:56,178 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:56 WrapperNode [2024-01-31 16:40:56,178 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:40:56,179 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:40:56,179 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:40:56,179 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:40:56,185 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 31.01 04:40:56" (1/1) ... [2024-01-31 16:40:56,209 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 31.01 04:40:56" (1/1) ... [2024-01-31 16:40:56,227 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2024-01-31 16:40:56,228 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:40:56,228 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:40:56,228 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:40:56,229 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:40:56,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:56" (1/1) ... [2024-01-31 16:40:56,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:56" (1/1) ... [2024-01-31 16:40:56,239 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:56" (1/1) ... [2024-01-31 16:40:56,249 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-31 16:40:56,249 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:56" (1/1) ... [2024-01-31 16:40:56,250 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:56" (1/1) ... [2024-01-31 16:40:56,253 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:56" (1/1) ... [2024-01-31 16:40:56,255 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:56" (1/1) ... [2024-01-31 16:40:56,256 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:56" (1/1) ... [2024-01-31 16:40:56,257 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:56" (1/1) ... [2024-01-31 16:40:56,258 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:40:56,259 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:40:56,259 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:40:56,259 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:40:56,260 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:56" (1/1) ... [2024-01-31 16:40:56,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:40:56,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:56,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 16:40:56,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 16:40:56,351 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-31 16:40:56,352 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-31 16:40:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-31 16:40:56,352 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-31 16:40:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:40:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:40:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:40:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 16:40:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:40:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:40:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:40:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:40:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:40:56,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:40:56,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 16:40:56,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:40:56,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:40:56,354 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:40:56,459 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:40:56,461 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:40:56,555 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:40:56,555 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:40:56,621 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:40:56,621 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 16:40:56,621 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:40:56 BoogieIcfgContainer [2024-01-31 16:40:56,621 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:40:56,623 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:40:56,623 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:40:56,625 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:40:56,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:40:55" (1/4) ... [2024-01-31 16:40:56,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c19671b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:40:56, skipping insertion in model container [2024-01-31 16:40:56,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:55" (2/4) ... [2024-01-31 16:40:56,627 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c19671b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:40:56, skipping insertion in model container [2024-01-31 16:40:56,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:56" (3/4) ... [2024-01-31 16:40:56,627 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c19671b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:40:56, skipping insertion in model container [2024-01-31 16:40:56,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:40:56" (4/4) ... [2024-01-31 16:40:56,628 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2024-01-31 16:40:56,640 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:40:56,640 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-01-31 16:40:56,640 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:40:56,664 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:40:56,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 26 transitions, 60 flow [2024-01-31 16:40:56,701 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2024-01-31 16:40:56,701 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:40:56,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 24 events. 3/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-01-31 16:40:56,703 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 26 transitions, 60 flow [2024-01-31 16:40:56,705 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 24 transitions, 54 flow [2024-01-31 16:40:56,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:40:56,716 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;@7d70ba11, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:40:56,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-31 16:40:56,721 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:40:56,721 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-01-31 16:40:56,721 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:40:56,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:56,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:56,722 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:40:56,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:56,726 INFO L85 PathProgramCache]: Analyzing trace with hash 911678794, now seen corresponding path program 1 times [2024-01-31 16:40:56,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:56,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258225214] [2024-01-31 16:40:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:56,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:57,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:57,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258225214] [2024-01-31 16:40:57,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258225214] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:57,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:57,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:40:57,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555347582] [2024-01-31 16:40:57,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:57,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:40:57,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:57,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:40:57,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:40:57,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 16:40:57,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 54 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:57,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:57,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 16:40:57,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:57,611 INFO L124 PetriNetUnfolderBase]: 345/592 cut-off events. [2024-01-31 16:40:57,611 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 16:40:57,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1140 conditions, 592 events. 345/592 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2430 event pairs, 70 based on Foata normal form. 12/591 useless extension candidates. Maximal degree in co-relation 1130. Up to 257 conditions per place. [2024-01-31 16:40:57,623 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 26 selfloop transitions, 4 changer transitions 22/56 dead transitions. [2024-01-31 16:40:57,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 56 transitions, 222 flow [2024-01-31 16:40:57,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:40:57,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:40:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-01-31 16:40:57,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-01-31 16:40:57,634 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 54 flow. Second operand 6 states and 91 transitions. [2024-01-31 16:40:57,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 56 transitions, 222 flow [2024-01-31 16:40:57,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 56 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:40:57,639 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 75 flow [2024-01-31 16:40:57,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=75, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2024-01-31 16:40:57,642 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 7 predicate places. [2024-01-31 16:40:57,643 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 75 flow [2024-01-31 16:40:57,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:57,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:57,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:57,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:40:57,644 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:40:57,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:57,644 INFO L85 PathProgramCache]: Analyzing trace with hash 923729954, now seen corresponding path program 1 times [2024-01-31 16:40:57,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:57,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205075411] [2024-01-31 16:40:57,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:57,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:57,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:57,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205075411] [2024-01-31 16:40:57,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205075411] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:57,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:57,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:40:57,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943825977] [2024-01-31 16:40:57,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:57,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:40:57,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:57,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:40:57,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:40:57,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 16:40:57,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 75 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:57,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:57,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 16:40:57,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:57,960 INFO L124 PetriNetUnfolderBase]: 454/822 cut-off events. [2024-01-31 16:40:57,961 INFO L125 PetriNetUnfolderBase]: For 297/303 co-relation queries the response was YES. [2024-01-31 16:40:57,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1839 conditions, 822 events. 454/822 cut-off events. For 297/303 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3615 event pairs, 71 based on Foata normal form. 33/854 useless extension candidates. Maximal degree in co-relation 1825. Up to 279 conditions per place. [2024-01-31 16:40:57,966 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 50 selfloop transitions, 9 changer transitions 20/83 dead transitions. [2024-01-31 16:40:57,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 83 transitions, 397 flow [2024-01-31 16:40:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:40:57,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:40:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-01-31 16:40:57,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-01-31 16:40:57,969 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 75 flow. Second operand 9 states and 130 transitions. [2024-01-31 16:40:57,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 83 transitions, 397 flow [2024-01-31 16:40:57,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 83 transitions, 381 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-01-31 16:40:57,972 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 160 flow [2024-01-31 16:40:57,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=160, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2024-01-31 16:40:57,973 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2024-01-31 16:40:57,974 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 160 flow [2024-01-31 16:40:57,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:57,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:57,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:57,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:40:57,975 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:40:57,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:57,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1440305894, now seen corresponding path program 2 times [2024-01-31 16:40:57,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:57,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018583135] [2024-01-31 16:40:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:57,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:58,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:58,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018583135] [2024-01-31 16:40:58,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018583135] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:58,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:58,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:40:58,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649635707] [2024-01-31 16:40:58,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:58,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:40:58,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:58,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:40:58,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:40:58,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 16:40:58,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:58,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:58,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 16:40:58,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:58,250 INFO L124 PetriNetUnfolderBase]: 391/723 cut-off events. [2024-01-31 16:40:58,250 INFO L125 PetriNetUnfolderBase]: For 1157/1169 co-relation queries the response was YES. [2024-01-31 16:40:58,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2032 conditions, 723 events. 391/723 cut-off events. For 1157/1169 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3182 event pairs, 92 based on Foata normal form. 48/770 useless extension candidates. Maximal degree in co-relation 2011. Up to 264 conditions per place. [2024-01-31 16:40:58,254 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 43 selfloop transitions, 15 changer transitions 32/94 dead transitions. [2024-01-31 16:40:58,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 94 transitions, 584 flow [2024-01-31 16:40:58,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:40:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:40:58,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-01-31 16:40:58,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269230769230769 [2024-01-31 16:40:58,256 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 160 flow. Second operand 10 states and 137 transitions. [2024-01-31 16:40:58,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 94 transitions, 584 flow [2024-01-31 16:40:58,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 94 transitions, 574 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-01-31 16:40:58,261 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 274 flow [2024-01-31 16:40:58,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=274, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2024-01-31 16:40:58,262 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2024-01-31 16:40:58,262 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 274 flow [2024-01-31 16:40:58,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:58,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:58,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:58,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:40:58,263 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:40:58,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:58,263 INFO L85 PathProgramCache]: Analyzing trace with hash -66587567, now seen corresponding path program 1 times [2024-01-31 16:40:58,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:58,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694153065] [2024-01-31 16:40:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:58,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:58,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:58,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694153065] [2024-01-31 16:40:58,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694153065] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:58,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:58,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:40:58,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188036700] [2024-01-31 16:40:58,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:58,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:40:58,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:58,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:40:58,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:40:58,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 16:40:58,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 274 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:58,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:58,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 16:40:58,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:58,569 INFO L124 PetriNetUnfolderBase]: 580/1058 cut-off events. [2024-01-31 16:40:58,569 INFO L125 PetriNetUnfolderBase]: For 3952/3964 co-relation queries the response was YES. [2024-01-31 16:40:58,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3464 conditions, 1058 events. 580/1058 cut-off events. For 3952/3964 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4980 event pairs, 53 based on Foata normal form. 39/1096 useless extension candidates. Maximal degree in co-relation 3436. Up to 271 conditions per place. [2024-01-31 16:40:58,575 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 60 selfloop transitions, 21 changer transitions 23/108 dead transitions. [2024-01-31 16:40:58,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 108 transitions, 792 flow [2024-01-31 16:40:58,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:40:58,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:40:58,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 156 transitions. [2024-01-31 16:40:58,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-01-31 16:40:58,577 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 274 flow. Second operand 11 states and 156 transitions. [2024-01-31 16:40:58,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 108 transitions, 792 flow [2024-01-31 16:40:58,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 108 transitions, 727 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-01-31 16:40:58,584 INFO L231 Difference]: Finished difference. Result has 65 places, 47 transitions, 382 flow [2024-01-31 16:40:58,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=382, PETRI_PLACES=65, PETRI_TRANSITIONS=47} [2024-01-31 16:40:58,585 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 37 predicate places. [2024-01-31 16:40:58,585 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 47 transitions, 382 flow [2024-01-31 16:40:58,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:58,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:58,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:58,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:40:58,586 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:40:58,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:58,587 INFO L85 PathProgramCache]: Analyzing trace with hash -760869871, now seen corresponding path program 2 times [2024-01-31 16:40:58,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:58,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664687123] [2024-01-31 16:40:58,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:58,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:58,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:58,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664687123] [2024-01-31 16:40:58,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664687123] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:58,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:58,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:40:58,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509010752] [2024-01-31 16:40:58,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:58,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:40:58,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:58,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:40:58,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:40:58,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 16:40:58,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 47 transitions, 382 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:58,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:58,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 16:40:58,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:58,879 INFO L124 PetriNetUnfolderBase]: 472/887 cut-off events. [2024-01-31 16:40:58,880 INFO L125 PetriNetUnfolderBase]: For 5332/5344 co-relation queries the response was YES. [2024-01-31 16:40:58,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3334 conditions, 887 events. 472/887 cut-off events. For 5332/5344 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4099 event pairs, 77 based on Foata normal form. 57/943 useless extension candidates. Maximal degree in co-relation 3301. Up to 253 conditions per place. [2024-01-31 16:40:58,884 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 45 selfloop transitions, 21 changer transitions 31/101 dead transitions. [2024-01-31 16:40:58,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 916 flow [2024-01-31 16:40:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:40:58,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:40:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-01-31 16:40:58,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2024-01-31 16:40:58,886 INFO L175 Difference]: Start difference. First operand has 65 places, 47 transitions, 382 flow. Second operand 10 states and 136 transitions. [2024-01-31 16:40:58,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 916 flow [2024-01-31 16:40:58,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 101 transitions, 841 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-01-31 16:40:58,896 INFO L231 Difference]: Finished difference. Result has 70 places, 49 transitions, 438 flow [2024-01-31 16:40:58,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=438, PETRI_PLACES=70, PETRI_TRANSITIONS=49} [2024-01-31 16:40:58,897 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 42 predicate places. [2024-01-31 16:40:58,897 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 438 flow [2024-01-31 16:40:58,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:58,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:58,898 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:58,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:40:58,898 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:40:58,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:58,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1192303582, now seen corresponding path program 1 times [2024-01-31 16:40:58,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:58,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870339953] [2024-01-31 16:40:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:58,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:58,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:58,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870339953] [2024-01-31 16:40:58,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870339953] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:58,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264296876] [2024-01-31 16:40:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:58,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:58,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:58,994 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:40:59,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 16:40:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:59,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 16:40:59,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:59,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:59,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264296876] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:59,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:59,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-31 16:40:59,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977648689] [2024-01-31 16:40:59,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:59,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:40:59,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:59,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:40:59,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:40:59,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 16:40:59,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 49 transitions, 438 flow. Second operand has 14 states, 14 states have (on average 8.142857142857142) internal successors, (114), 14 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:59,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:59,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 16:40:59,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:59,575 INFO L124 PetriNetUnfolderBase]: 670/1226 cut-off events. [2024-01-31 16:40:59,575 INFO L125 PetriNetUnfolderBase]: For 9645/9657 co-relation queries the response was YES. [2024-01-31 16:40:59,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4962 conditions, 1226 events. 670/1226 cut-off events. For 9645/9657 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5423 event pairs, 65 based on Foata normal form. 57/1282 useless extension candidates. Maximal degree in co-relation 4927. Up to 204 conditions per place. [2024-01-31 16:40:59,582 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 67 selfloop transitions, 36 changer transitions 56/163 dead transitions. [2024-01-31 16:40:59,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 163 transitions, 1530 flow [2024-01-31 16:40:59,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:40:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:40:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 256 transitions. [2024-01-31 16:40:59,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182186234817814 [2024-01-31 16:40:59,583 INFO L175 Difference]: Start difference. First operand has 70 places, 49 transitions, 438 flow. Second operand 19 states and 256 transitions. [2024-01-31 16:40:59,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 163 transitions, 1530 flow [2024-01-31 16:40:59,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 163 transitions, 1395 flow, removed 50 selfloop flow, removed 9 redundant places. [2024-01-31 16:40:59,594 INFO L231 Difference]: Finished difference. Result has 86 places, 65 transitions, 763 flow [2024-01-31 16:40:59,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=763, PETRI_PLACES=86, PETRI_TRANSITIONS=65} [2024-01-31 16:40:59,595 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-01-31 16:40:59,595 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 65 transitions, 763 flow [2024-01-31 16:40:59,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.142857142857142) internal successors, (114), 14 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:59,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:59,596 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:59,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 16:40:59,808 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,SelfDestructingSolverStorable5 [2024-01-31 16:40:59,809 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:40:59,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:59,810 INFO L85 PathProgramCache]: Analyzing trace with hash 537571274, now seen corresponding path program 1 times [2024-01-31 16:40:59,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:59,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476921461] [2024-01-31 16:40:59,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:59,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:40:59,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:59,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476921461] [2024-01-31 16:40:59,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476921461] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:59,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670026772] [2024-01-31 16:40:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:59,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:59,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:00,005 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:00,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 16:41:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:00,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 16:41:00,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:41:00,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:41:00,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670026772] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:00,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:00,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-01-31 16:41:00,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379947747] [2024-01-31 16:41:00,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:00,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:41:00,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:00,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:41:00,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:41:00,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 16:41:00,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 65 transitions, 763 flow. Second operand has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:00,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:00,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 16:41:00,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:00,849 INFO L124 PetriNetUnfolderBase]: 868/1635 cut-off events. [2024-01-31 16:41:00,849 INFO L125 PetriNetUnfolderBase]: For 19184/19196 co-relation queries the response was YES. [2024-01-31 16:41:00,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7417 conditions, 1635 events. 868/1635 cut-off events. For 19184/19196 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7326 event pairs, 227 based on Foata normal form. 93/1727 useless extension candidates. Maximal degree in co-relation 7376. Up to 765 conditions per place. [2024-01-31 16:41:00,858 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 95 selfloop transitions, 27 changer transitions 89/215 dead transitions. [2024-01-31 16:41:00,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 215 transitions, 2435 flow [2024-01-31 16:41:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:41:00,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:41:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 327 transitions. [2024-01-31 16:41:00,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030769230769231 [2024-01-31 16:41:00,861 INFO L175 Difference]: Start difference. First operand has 86 places, 65 transitions, 763 flow. Second operand 25 states and 327 transitions. [2024-01-31 16:41:00,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 215 transitions, 2435 flow [2024-01-31 16:41:00,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 215 transitions, 1928 flow, removed 241 selfloop flow, removed 10 redundant places. [2024-01-31 16:41:00,881 INFO L231 Difference]: Finished difference. Result has 114 places, 79 transitions, 859 flow [2024-01-31 16:41:00,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=859, PETRI_PLACES=114, PETRI_TRANSITIONS=79} [2024-01-31 16:41:00,882 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 86 predicate places. [2024-01-31 16:41:00,882 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 79 transitions, 859 flow [2024-01-31 16:41:00,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:00,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:00,883 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:00,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:01,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-01-31 16:41:01,100 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:41:01,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:01,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2014995576, now seen corresponding path program 2 times [2024-01-31 16:41:01,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:01,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478133895] [2024-01-31 16:41:01,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:01,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:41:01,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:01,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478133895] [2024-01-31 16:41:01,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478133895] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:01,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411517835] [2024-01-31 16:41:01,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:41:01,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:01,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:01,293 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:01,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 16:41:01,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:41:01,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:41:01,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 16:41:01,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:41:01,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:41:01,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411517835] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:01,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:01,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-01-31 16:41:01,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664301225] [2024-01-31 16:41:01,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:01,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:41:01,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:01,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:41:01,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:41:01,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 16:41:01,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 79 transitions, 859 flow. Second operand has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:01,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:01,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 16:41:01,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:02,327 INFO L124 PetriNetUnfolderBase]: 1552/2925 cut-off events. [2024-01-31 16:41:02,327 INFO L125 PetriNetUnfolderBase]: For 67033/67045 co-relation queries the response was YES. [2024-01-31 16:41:02,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15296 conditions, 2925 events. 1552/2925 cut-off events. For 67033/67045 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 15834 event pairs, 148 based on Foata normal form. 93/3017 useless extension candidates. Maximal degree in co-relation 15242. Up to 528 conditions per place. [2024-01-31 16:41:02,365 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 133 selfloop transitions, 81 changer transitions 91/309 dead transitions. [2024-01-31 16:41:02,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 309 transitions, 3919 flow [2024-01-31 16:41:02,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-31 16:41:02,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-31 16:41:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 431 transitions. [2024-01-31 16:41:02,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180288461538461 [2024-01-31 16:41:02,368 INFO L175 Difference]: Start difference. First operand has 114 places, 79 transitions, 859 flow. Second operand 32 states and 431 transitions. [2024-01-31 16:41:02,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 309 transitions, 3919 flow [2024-01-31 16:41:02,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 309 transitions, 3258 flow, removed 321 selfloop flow, removed 13 redundant places. [2024-01-31 16:41:02,428 INFO L231 Difference]: Finished difference. Result has 146 places, 122 transitions, 1646 flow [2024-01-31 16:41:02,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1646, PETRI_PLACES=146, PETRI_TRANSITIONS=122} [2024-01-31 16:41:02,429 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 118 predicate places. [2024-01-31 16:41:02,429 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 122 transitions, 1646 flow [2024-01-31 16:41:02,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:02,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:02,430 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:02,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:02,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:02,642 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:41:02,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:02,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1289083952, now seen corresponding path program 3 times [2024-01-31 16:41:02,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:02,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024258838] [2024-01-31 16:41:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:02,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:41:02,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:02,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024258838] [2024-01-31 16:41:02,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024258838] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:02,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548092533] [2024-01-31 16:41:02,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:41:02,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:02,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:02,786 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:02,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 16:41:02,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 16:41:02,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:41:02,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:41:02,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-01-31 16:41:02,917 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:41:02,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548092533] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:41:02,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:41:02,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2024-01-31 16:41:02,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700184549] [2024-01-31 16:41:02,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:41:02,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:41:02,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:02,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:41:02,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:41:02,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 16:41:02,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 122 transitions, 1646 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:02,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:02,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 16:41:02,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:03,578 INFO L124 PetriNetUnfolderBase]: 1660/3225 cut-off events. [2024-01-31 16:41:03,578 INFO L125 PetriNetUnfolderBase]: For 116515/116521 co-relation queries the response was YES. [2024-01-31 16:41:03,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19384 conditions, 3225 events. 1660/3225 cut-off events. For 116515/116521 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 18756 event pairs, 296 based on Foata normal form. 87/3311 useless extension candidates. Maximal degree in co-relation 19315. Up to 1029 conditions per place. [2024-01-31 16:41:03,609 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 94 selfloop transitions, 130 changer transitions 0/228 dead transitions. [2024-01-31 16:41:03,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 228 transitions, 3918 flow [2024-01-31 16:41:03,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:41:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:41:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 182 transitions. [2024-01-31 16:41:03,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-01-31 16:41:03,611 INFO L175 Difference]: Start difference. First operand has 146 places, 122 transitions, 1646 flow. Second operand 13 states and 182 transitions. [2024-01-31 16:41:03,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 228 transitions, 3918 flow [2024-01-31 16:41:03,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 228 transitions, 3211 flow, removed 337 selfloop flow, removed 15 redundant places. [2024-01-31 16:41:03,730 INFO L231 Difference]: Finished difference. Result has 144 places, 170 transitions, 2937 flow [2024-01-31 16:41:03,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2937, PETRI_PLACES=144, PETRI_TRANSITIONS=170} [2024-01-31 16:41:03,731 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 116 predicate places. [2024-01-31 16:41:03,732 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 170 transitions, 2937 flow [2024-01-31 16:41:03,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:03,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:03,732 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:03,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:03,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:03,945 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:41:03,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:03,946 INFO L85 PathProgramCache]: Analyzing trace with hash 2127799981, now seen corresponding path program 1 times [2024-01-31 16:41:03,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:03,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273606189] [2024-01-31 16:41:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:03,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:41:04,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:04,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273606189] [2024-01-31 16:41:04,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273606189] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:04,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601059200] [2024-01-31 16:41:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:04,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:04,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:04,080 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:04,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 16:41:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:04,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 16:41:04,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:41:04,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:41:04,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601059200] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:04,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:04,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2024-01-31 16:41:04,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872397000] [2024-01-31 16:41:04,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:04,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:41:04,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:04,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:41:04,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:41:04,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-01-31 16:41:04,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 170 transitions, 2937 flow. Second operand has 22 states, 22 states have (on average 7.090909090909091) internal successors, (156), 22 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:04,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:04,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-01-31 16:41:04,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:06,372 INFO L124 PetriNetUnfolderBase]: 3730/6732 cut-off events. [2024-01-31 16:41:06,373 INFO L125 PetriNetUnfolderBase]: For 309654/309660 co-relation queries the response was YES. [2024-01-31 16:41:06,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46582 conditions, 6732 events. 3730/6732 cut-off events. For 309654/309660 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 41363 event pairs, 375 based on Foata normal form. 321/7052 useless extension candidates. Maximal degree in co-relation 46514. Up to 1365 conditions per place. [2024-01-31 16:41:06,421 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 303 selfloop transitions, 182 changer transitions 137/625 dead transitions. [2024-01-31 16:41:06,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 625 transitions, 12401 flow [2024-01-31 16:41:06,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-01-31 16:41:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-01-31 16:41:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 597 transitions. [2024-01-31 16:41:06,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-01-31 16:41:06,423 INFO L175 Difference]: Start difference. First operand has 144 places, 170 transitions, 2937 flow. Second operand 48 states and 597 transitions. [2024-01-31 16:41:06,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 625 transitions, 12401 flow [2024-01-31 16:41:07,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 625 transitions, 9389 flow, removed 1501 selfloop flow, removed 3 redundant places. [2024-01-31 16:41:07,069 INFO L231 Difference]: Finished difference. Result has 221 places, 262 transitions, 5527 flow [2024-01-31 16:41:07,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=5527, PETRI_PLACES=221, PETRI_TRANSITIONS=262} [2024-01-31 16:41:07,071 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 193 predicate places. [2024-01-31 16:41:07,071 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 262 transitions, 5527 flow [2024-01-31 16:41:07,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.090909090909091) internal successors, (156), 22 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:07,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:07,072 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:07,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-31 16:41:07,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-31 16:41:07,287 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:41:07,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:07,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1689931393, now seen corresponding path program 4 times [2024-01-31 16:41:07,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:07,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289050044] [2024-01-31 16:41:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:07,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:41:07,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:07,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289050044] [2024-01-31 16:41:07,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289050044] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:07,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569904359] [2024-01-31 16:41:07,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:41:07,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:07,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:07,411 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:07,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 16:41:07,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:41:07,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:41:07,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 16:41:07,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:41:07,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:41:07,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569904359] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:07,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:07,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2024-01-31 16:41:07,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649323332] [2024-01-31 16:41:07,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:07,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:41:07,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:07,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:41:07,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:41:07,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 16:41:07,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 262 transitions, 5527 flow. Second operand has 19 states, 19 states have (on average 8.368421052631579) internal successors, (159), 19 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:07,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:07,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 16:41:07,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:09,540 INFO L124 PetriNetUnfolderBase]: 3640/6835 cut-off events. [2024-01-31 16:41:09,541 INFO L125 PetriNetUnfolderBase]: For 367265/367287 co-relation queries the response was YES. [2024-01-31 16:41:09,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50088 conditions, 6835 events. 3640/6835 cut-off events. For 367265/367287 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 44536 event pairs, 1119 based on Foata normal form. 285/7111 useless extension candidates. Maximal degree in co-relation 49988. Up to 3403 conditions per place. [2024-01-31 16:41:09,703 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 253 selfloop transitions, 111 changer transitions 130/498 dead transitions. [2024-01-31 16:41:09,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 498 transitions, 11278 flow [2024-01-31 16:41:09,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 16:41:09,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 16:41:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 405 transitions. [2024-01-31 16:41:09,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024813895781638 [2024-01-31 16:41:09,705 INFO L175 Difference]: Start difference. First operand has 221 places, 262 transitions, 5527 flow. Second operand 31 states and 405 transitions. [2024-01-31 16:41:09,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 498 transitions, 11278 flow [2024-01-31 16:41:10,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 498 transitions, 8076 flow, removed 1538 selfloop flow, removed 22 redundant places. [2024-01-31 16:41:10,696 INFO L231 Difference]: Finished difference. Result has 245 places, 298 transitions, 5263 flow [2024-01-31 16:41:10,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4041, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=5263, PETRI_PLACES=245, PETRI_TRANSITIONS=298} [2024-01-31 16:41:10,698 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 217 predicate places. [2024-01-31 16:41:10,698 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 298 transitions, 5263 flow [2024-01-31 16:41:10,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.368421052631579) internal successors, (159), 19 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:10,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:10,698 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:10,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:10,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:10,913 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:41:10,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:10,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1828131325, now seen corresponding path program 5 times [2024-01-31 16:41:10,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:10,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865703496] [2024-01-31 16:41:10,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:10,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:41:11,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:11,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865703496] [2024-01-31 16:41:11,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865703496] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:11,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019629419] [2024-01-31 16:41:11,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:41:11,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:11,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:11,100 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:11,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 16:41:11,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:41:11,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:41:11,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 16:41:11,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:41:11,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:41:11,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019629419] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:11,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:11,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-01-31 16:41:11,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532186348] [2024-01-31 16:41:11,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:11,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:41:11,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:11,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:41:11,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:41:11,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 16:41:11,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 298 transitions, 5263 flow. Second operand has 20 states, 20 states have (on average 8.4) internal successors, (168), 20 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:11,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:11,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 16:41:11,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:13,845 INFO L124 PetriNetUnfolderBase]: 4873/9262 cut-off events. [2024-01-31 16:41:13,845 INFO L125 PetriNetUnfolderBase]: For 269964/269986 co-relation queries the response was YES. [2024-01-31 16:41:13,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55062 conditions, 9262 events. 4873/9262 cut-off events. For 269964/269986 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 64080 event pairs, 526 based on Foata normal form. 573/9823 useless extension candidates. Maximal degree in co-relation 54953. Up to 1944 conditions per place. [2024-01-31 16:41:13,916 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 198 selfloop transitions, 258 changer transitions 199/659 dead transitions. [2024-01-31 16:41:13,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 659 transitions, 12055 flow [2024-01-31 16:41:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-31 16:41:13,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-31 16:41:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 502 transitions. [2024-01-31 16:41:13,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080971659919028 [2024-01-31 16:41:13,919 INFO L175 Difference]: Start difference. First operand has 245 places, 298 transitions, 5263 flow. Second operand 38 states and 502 transitions. [2024-01-31 16:41:13,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 659 transitions, 12055 flow [2024-01-31 16:41:15,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 659 transitions, 11332 flow, removed 309 selfloop flow, removed 27 redundant places. [2024-01-31 16:41:15,039 INFO L231 Difference]: Finished difference. Result has 265 places, 368 transitions, 7407 flow [2024-01-31 16:41:15,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4801, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=7407, PETRI_PLACES=265, PETRI_TRANSITIONS=368} [2024-01-31 16:41:15,040 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 237 predicate places. [2024-01-31 16:41:15,040 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 368 transitions, 7407 flow [2024-01-31 16:41:15,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.4) internal successors, (168), 20 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:15,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:15,041 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:15,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-31 16:41:15,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:15,252 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:41:15,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:15,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1724517600, now seen corresponding path program 6 times [2024-01-31 16:41:15,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:15,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002769725] [2024-01-31 16:41:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:15,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:15,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:15,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002769725] [2024-01-31 16:41:15,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002769725] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:15,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983268427] [2024-01-31 16:41:15,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:41:15,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:15,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:15,393 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:15,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 16:41:15,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:41:15,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:41:15,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:41:15,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-01-31 16:41:15,534 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:41:15,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983268427] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:41:15,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:41:15,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 17 [2024-01-31 16:41:15,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303648508] [2024-01-31 16:41:15,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:41:15,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:41:15,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:15,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:41:15,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:41:15,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-01-31 16:41:15,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 368 transitions, 7407 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:15,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:15,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-01-31 16:41:15,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:17,697 INFO L124 PetriNetUnfolderBase]: 4891/9734 cut-off events. [2024-01-31 16:41:17,697 INFO L125 PetriNetUnfolderBase]: For 340460/340544 co-relation queries the response was YES. [2024-01-31 16:41:17,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60234 conditions, 9734 events. 4891/9734 cut-off events. For 340460/340544 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 71149 event pairs, 2157 based on Foata normal form. 149/9832 useless extension candidates. Maximal degree in co-relation 60122. Up to 5604 conditions per place. [2024-01-31 16:41:17,790 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 282 selfloop transitions, 167 changer transitions 27/494 dead transitions. [2024-01-31 16:41:17,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 494 transitions, 10875 flow [2024-01-31 16:41:17,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:41:17,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:41:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-01-31 16:41:17,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-01-31 16:41:17,792 INFO L175 Difference]: Start difference. First operand has 265 places, 368 transitions, 7407 flow. Second operand 8 states and 120 transitions. [2024-01-31 16:41:17,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 494 transitions, 10875 flow [2024-01-31 16:41:19,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 494 transitions, 9892 flow, removed 428 selfloop flow, removed 23 redundant places. [2024-01-31 16:41:19,273 INFO L231 Difference]: Finished difference. Result has 243 places, 422 transitions, 8599 flow [2024-01-31 16:41:19,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6626, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8599, PETRI_PLACES=243, PETRI_TRANSITIONS=422} [2024-01-31 16:41:19,274 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 215 predicate places. [2024-01-31 16:41:19,274 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 422 transitions, 8599 flow [2024-01-31 16:41:19,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:19,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:19,274 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:19,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:19,486 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,SelfDestructingSolverStorable12 [2024-01-31 16:41:19,487 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:41:19,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:19,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2118326319, now seen corresponding path program 7 times [2024-01-31 16:41:19,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:19,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409176553] [2024-01-31 16:41:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:19,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:19,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:19,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409176553] [2024-01-31 16:41:19,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409176553] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:19,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079474734] [2024-01-31 16:41:19,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:41:19,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:19,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:19,748 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:19,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 16:41:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:19,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2024-01-31 16:41:19,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:19,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:20,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079474734] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:20,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:20,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2024-01-31 16:41:20,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986936396] [2024-01-31 16:41:20,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:20,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 16:41:20,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:20,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 16:41:20,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2024-01-31 16:41:20,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 16:41:20,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 422 transitions, 8599 flow. Second operand has 28 states, 28 states have (on average 8.071428571428571) internal successors, (226), 28 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:20,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:20,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 16:41:20,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:24,112 INFO L124 PetriNetUnfolderBase]: 6574/12880 cut-off events. [2024-01-31 16:41:24,113 INFO L125 PetriNetUnfolderBase]: For 555119/555139 co-relation queries the response was YES. [2024-01-31 16:41:24,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86204 conditions, 12880 events. 6574/12880 cut-off events. For 555119/555139 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 89058 event pairs, 459 based on Foata normal form. 978/13837 useless extension candidates. Maximal degree in co-relation 86101. Up to 2736 conditions per place. [2024-01-31 16:41:24,230 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 248 selfloop transitions, 384 changer transitions 297/933 dead transitions. [2024-01-31 16:41:24,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 933 transitions, 19567 flow [2024-01-31 16:41:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-01-31 16:41:24,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-01-31 16:41:24,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 744 transitions. [2024-01-31 16:41:24,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510989010989011 [2024-01-31 16:41:24,238 INFO L175 Difference]: Start difference. First operand has 243 places, 422 transitions, 8599 flow. Second operand 56 states and 744 transitions. [2024-01-31 16:41:24,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 933 transitions, 19567 flow [2024-01-31 16:41:26,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 933 transitions, 18513 flow, removed 527 selfloop flow, removed 7 redundant places. [2024-01-31 16:41:26,840 INFO L231 Difference]: Finished difference. Result has 306 places, 464 transitions, 10972 flow [2024-01-31 16:41:26,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8114, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=10972, PETRI_PLACES=306, PETRI_TRANSITIONS=464} [2024-01-31 16:41:26,841 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 278 predicate places. [2024-01-31 16:41:26,841 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 464 transitions, 10972 flow [2024-01-31 16:41:26,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.071428571428571) internal successors, (226), 28 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:26,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:26,841 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:26,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-31 16:41:27,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-31 16:41:27,054 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:41:27,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:27,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2124506323, now seen corresponding path program 8 times [2024-01-31 16:41:27,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:27,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781262889] [2024-01-31 16:41:27,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:27,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:27,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:27,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781262889] [2024-01-31 16:41:27,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781262889] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:27,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15824983] [2024-01-31 16:41:27,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:41:27,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:27,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:27,524 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:27,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 16:41:27,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:41:27,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:41:27,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-31 16:41:27,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:27,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:27,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15824983] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:27,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:27,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 26 [2024-01-31 16:41:27,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668821850] [2024-01-31 16:41:27,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:27,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:41:27,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:27,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:41:27,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:41:28,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 16:41:28,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 464 transitions, 10972 flow. Second operand has 27 states, 27 states have (on average 8.222222222222221) internal successors, (222), 27 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:28,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:28,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 16:41:28,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:31,076 INFO L124 PetriNetUnfolderBase]: 5503/10928 cut-off events. [2024-01-31 16:41:31,076 INFO L125 PetriNetUnfolderBase]: For 389525/389531 co-relation queries the response was YES. [2024-01-31 16:41:31,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68269 conditions, 10928 events. 5503/10928 cut-off events. For 389525/389531 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 75789 event pairs, 2108 based on Foata normal form. 60/10967 useless extension candidates. Maximal degree in co-relation 68148. Up to 6667 conditions per place. [2024-01-31 16:41:31,165 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 415 selfloop transitions, 152 changer transitions 87/658 dead transitions. [2024-01-31 16:41:31,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 658 transitions, 14954 flow [2024-01-31 16:41:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-31 16:41:31,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-31 16:41:31,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 420 transitions. [2024-01-31 16:41:31,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48951048951048953 [2024-01-31 16:41:31,167 INFO L175 Difference]: Start difference. First operand has 306 places, 464 transitions, 10972 flow. Second operand 33 states and 420 transitions. [2024-01-31 16:41:31,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 658 transitions, 14954 flow [2024-01-31 16:41:32,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 658 transitions, 13348 flow, removed 702 selfloop flow, removed 28 redundant places. [2024-01-31 16:41:33,016 INFO L231 Difference]: Finished difference. Result has 309 places, 484 transitions, 10506 flow [2024-01-31 16:41:33,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=9666, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10506, PETRI_PLACES=309, PETRI_TRANSITIONS=484} [2024-01-31 16:41:33,018 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 281 predicate places. [2024-01-31 16:41:33,018 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 484 transitions, 10506 flow [2024-01-31 16:41:33,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 8.222222222222221) internal successors, (222), 27 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:33,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:33,018 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:33,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:33,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 16:41:33,229 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:41:33,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:33,229 INFO L85 PathProgramCache]: Analyzing trace with hash -388663647, now seen corresponding path program 9 times [2024-01-31 16:41:33,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:33,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095576407] [2024-01-31 16:41:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:33,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:33,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:33,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095576407] [2024-01-31 16:41:33,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095576407] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:33,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742749216] [2024-01-31 16:41:33,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:41:33,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:33,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:33,565 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:33,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 16:41:33,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-01-31 16:41:33,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:41:33,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-31 16:41:33,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:33,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:34,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742749216] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:34,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:34,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 28 [2024-01-31 16:41:34,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983872452] [2024-01-31 16:41:34,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:34,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 16:41:34,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:34,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 16:41:34,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2024-01-31 16:41:34,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 16:41:34,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 484 transitions, 10506 flow. Second operand has 29 states, 29 states have (on average 8.310344827586206) internal successors, (241), 29 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:34,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:34,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 16:41:34,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:37,468 INFO L124 PetriNetUnfolderBase]: 5782/11577 cut-off events. [2024-01-31 16:41:37,468 INFO L125 PetriNetUnfolderBase]: For 382984/382990 co-relation queries the response was YES. [2024-01-31 16:41:37,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68750 conditions, 11577 events. 5782/11577 cut-off events. For 382984/382990 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 81213 event pairs, 1271 based on Foata normal form. 60/11616 useless extension candidates. Maximal degree in co-relation 68628. Up to 4009 conditions per place. [2024-01-31 16:41:37,781 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 304 selfloop transitions, 312 changer transitions 97/717 dead transitions. [2024-01-31 16:41:37,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 717 transitions, 14847 flow [2024-01-31 16:41:37,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-31 16:41:37,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-31 16:41:37,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 488 transitions. [2024-01-31 16:41:37,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4939271255060729 [2024-01-31 16:41:37,787 INFO L175 Difference]: Start difference. First operand has 309 places, 484 transitions, 10506 flow. Second operand 38 states and 488 transitions. [2024-01-31 16:41:37,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 717 transitions, 14847 flow [2024-01-31 16:41:39,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 717 transitions, 14599 flow, removed 76 selfloop flow, removed 12 redundant places. [2024-01-31 16:41:39,811 INFO L231 Difference]: Finished difference. Result has 346 places, 517 transitions, 11896 flow [2024-01-31 16:41:39,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=10258, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=11896, PETRI_PLACES=346, PETRI_TRANSITIONS=517} [2024-01-31 16:41:39,812 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 318 predicate places. [2024-01-31 16:41:39,813 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 517 transitions, 11896 flow [2024-01-31 16:41:39,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.310344827586206) internal successors, (241), 29 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:39,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:39,813 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:39,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:40,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 16:41:40,029 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:41:40,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:40,029 INFO L85 PathProgramCache]: Analyzing trace with hash -652941501, now seen corresponding path program 10 times [2024-01-31 16:41:40,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:40,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186771850] [2024-01-31 16:41:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:40,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:40,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:40,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186771850] [2024-01-31 16:41:40,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186771850] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:40,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529912721] [2024-01-31 16:41:40,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:41:40,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:40,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:40,410 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:40,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 16:41:40,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:41:40,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:41:40,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-31 16:41:40,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:40,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:40,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529912721] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:40,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:40,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 26 [2024-01-31 16:41:40,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132722117] [2024-01-31 16:41:40,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:40,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:41:40,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:40,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:41:40,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:41:40,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 16:41:40,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 517 transitions, 11896 flow. Second operand has 27 states, 27 states have (on average 8.296296296296296) internal successors, (224), 27 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:40,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:40,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 16:41:40,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:44,684 INFO L124 PetriNetUnfolderBase]: 6043/12161 cut-off events. [2024-01-31 16:41:44,685 INFO L125 PetriNetUnfolderBase]: For 422102/422108 co-relation queries the response was YES. [2024-01-31 16:41:44,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73531 conditions, 12161 events. 6043/12161 cut-off events. For 422102/422108 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 85878 event pairs, 938 based on Foata normal form. 60/12200 useless extension candidates. Maximal degree in co-relation 73396. Up to 2872 conditions per place. [2024-01-31 16:41:44,908 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 264 selfloop transitions, 388 changer transitions 99/755 dead transitions. [2024-01-31 16:41:44,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 755 transitions, 16351 flow [2024-01-31 16:41:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-31 16:41:44,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-31 16:41:44,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 504 transitions. [2024-01-31 16:41:44,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970414201183432 [2024-01-31 16:41:44,911 INFO L175 Difference]: Start difference. First operand has 346 places, 517 transitions, 11896 flow. Second operand 39 states and 504 transitions. [2024-01-31 16:41:44,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 755 transitions, 16351 flow [2024-01-31 16:41:46,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 755 transitions, 15716 flow, removed 192 selfloop flow, removed 23 redundant places. [2024-01-31 16:41:46,998 INFO L231 Difference]: Finished difference. Result has 373 places, 545 transitions, 13004 flow [2024-01-31 16:41:46,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=11341, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=13004, PETRI_PLACES=373, PETRI_TRANSITIONS=545} [2024-01-31 16:41:46,999 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 345 predicate places. [2024-01-31 16:41:47,000 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 545 transitions, 13004 flow [2024-01-31 16:41:47,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 8.296296296296296) internal successors, (224), 27 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:47,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:47,001 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:47,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:47,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-31 16:41:47,211 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:41:47,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:47,212 INFO L85 PathProgramCache]: Analyzing trace with hash 468697399, now seen corresponding path program 11 times [2024-01-31 16:41:47,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:47,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918211520] [2024-01-31 16:41:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:47,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:47,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:47,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918211520] [2024-01-31 16:41:47,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918211520] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:47,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615926677] [2024-01-31 16:41:47,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:41:47,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:47,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:47,597 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:47,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-31 16:41:47,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-01-31 16:41:47,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:41:47,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-31 16:41:47,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:47,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:48,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615926677] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:48,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:48,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 28 [2024-01-31 16:41:48,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369009850] [2024-01-31 16:41:48,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:48,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 16:41:48,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:48,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 16:41:48,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2024-01-31 16:41:48,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 16:41:48,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 545 transitions, 13004 flow. Second operand has 29 states, 29 states have (on average 8.344827586206897) internal successors, (242), 29 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:48,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:48,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 16:41:48,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:52,493 INFO L124 PetriNetUnfolderBase]: 6376/12855 cut-off events. [2024-01-31 16:41:52,494 INFO L125 PetriNetUnfolderBase]: For 445555/445561 co-relation queries the response was YES. [2024-01-31 16:41:52,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78186 conditions, 12855 events. 6376/12855 cut-off events. For 445555/445561 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 91437 event pairs, 743 based on Foata normal form. 60/12894 useless extension candidates. Maximal degree in co-relation 78042. Up to 2820 conditions per place. [2024-01-31 16:41:52,667 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 252 selfloop transitions, 451 changer transitions 109/816 dead transitions. [2024-01-31 16:41:52,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 816 transitions, 17858 flow [2024-01-31 16:41:52,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-31 16:41:52,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-31 16:41:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 572 transitions. [2024-01-31 16:41:52,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-31 16:41:52,669 INFO L175 Difference]: Start difference. First operand has 373 places, 545 transitions, 13004 flow. Second operand 44 states and 572 transitions. [2024-01-31 16:41:52,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 816 transitions, 17858 flow [2024-01-31 16:41:55,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 816 transitions, 17076 flow, removed 158 selfloop flow, removed 26 redundant places. [2024-01-31 16:41:55,751 INFO L231 Difference]: Finished difference. Result has 401 places, 577 transitions, 14155 flow [2024-01-31 16:41:55,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=12302, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=14155, PETRI_PLACES=401, PETRI_TRANSITIONS=577} [2024-01-31 16:41:55,752 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 373 predicate places. [2024-01-31 16:41:55,753 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 577 transitions, 14155 flow [2024-01-31 16:41:55,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.344827586206897) internal successors, (242), 29 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:55,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:55,753 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:55,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:55,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-31 16:41:55,955 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:41:55,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:55,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2056416457, now seen corresponding path program 12 times [2024-01-31 16:41:55,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:55,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108869307] [2024-01-31 16:41:55,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:55,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:56,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:56,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108869307] [2024-01-31 16:41:56,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108869307] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:56,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129323919] [2024-01-31 16:41:56,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:41:56,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:56,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:56,391 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:56,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 16:41:56,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-01-31 16:41:56,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:41:56,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 16:41:56,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2024-01-31 16:41:56,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-01-31 16:41:56,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129323919] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:56,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:41:56,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [22, 9] total 33 [2024-01-31 16:41:56,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677398808] [2024-01-31 16:41:56,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:41:56,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:41:56,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:56,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:41:56,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 16:41:56,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 26 [2024-01-31 16:41:56,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 577 transitions, 14155 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:56,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:56,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 26 [2024-01-31 16:41:56,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:59,429 INFO L124 PetriNetUnfolderBase]: 4577/10566 cut-off events. [2024-01-31 16:41:59,430 INFO L125 PetriNetUnfolderBase]: For 298146/299000 co-relation queries the response was YES. [2024-01-31 16:41:59,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55323 conditions, 10566 events. 4577/10566 cut-off events. For 298146/299000 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 84680 event pairs, 1916 based on Foata normal form. 191/10495 useless extension candidates. Maximal degree in co-relation 55171. Up to 4485 conditions per place. [2024-01-31 16:41:59,559 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 22 selfloop transitions, 66 changer transitions 0/586 dead transitions. [2024-01-31 16:41:59,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 586 transitions, 14335 flow [2024-01-31 16:41:59,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:41:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:41:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2024-01-31 16:41:59,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480769230769231 [2024-01-31 16:41:59,560 INFO L175 Difference]: Start difference. First operand has 401 places, 577 transitions, 14155 flow. Second operand 4 states and 57 transitions. [2024-01-31 16:41:59,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 586 transitions, 14335 flow [2024-01-31 16:42:02,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 586 transitions, 13443 flow, removed 134 selfloop flow, removed 34 redundant places. [2024-01-31 16:42:02,039 INFO L231 Difference]: Finished difference. Result has 364 places, 576 transitions, 13379 flow [2024-01-31 16:42:02,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=13247, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=13379, PETRI_PLACES=364, PETRI_TRANSITIONS=576} [2024-01-31 16:42:02,040 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 336 predicate places. [2024-01-31 16:42:02,040 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 576 transitions, 13379 flow [2024-01-31 16:42:02,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:02,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:02,041 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:02,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-01-31 16:42:02,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:02,244 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:42:02,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:02,245 INFO L85 PathProgramCache]: Analyzing trace with hash 462738524, now seen corresponding path program 2 times [2024-01-31 16:42:02,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:02,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421528563] [2024-01-31 16:42:02,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:02,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:02,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:02,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421528563] [2024-01-31 16:42:02,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421528563] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:02,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991845465] [2024-01-31 16:42:02,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:42:02,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:02,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:02,572 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:42:02,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 16:42:02,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:42:02,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:42:02,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-31 16:42:02,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:02,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:03,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991845465] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:03,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:03,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2024-01-31 16:42:03,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359545078] [2024-01-31 16:42:03,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:03,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-01-31 16:42:03,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:03,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-01-31 16:42:03,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2024-01-31 16:42:03,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-01-31 16:42:03,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 576 transitions, 13379 flow. Second operand has 36 states, 36 states have (on average 6.972222222222222) internal successors, (251), 36 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:03,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:03,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-01-31 16:42:03,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:08,338 INFO L124 PetriNetUnfolderBase]: 7483/14795 cut-off events. [2024-01-31 16:42:08,338 INFO L125 PetriNetUnfolderBase]: For 471162/471168 co-relation queries the response was YES. [2024-01-31 16:42:08,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87573 conditions, 14795 events. 7483/14795 cut-off events. For 471162/471168 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 104051 event pairs, 613 based on Foata normal form. 213/15007 useless extension candidates. Maximal degree in co-relation 87435. Up to 3171 conditions per place. [2024-01-31 16:42:08,501 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 251 selfloop transitions, 519 changer transitions 219/992 dead transitions. [2024-01-31 16:42:08,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 992 transitions, 20528 flow [2024-01-31 16:42:08,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-01-31 16:42:08,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-01-31 16:42:08,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 691 transitions. [2024-01-31 16:42:08,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46626180836707154 [2024-01-31 16:42:08,512 INFO L175 Difference]: Start difference. First operand has 364 places, 576 transitions, 13379 flow. Second operand 57 states and 691 transitions. [2024-01-31 16:42:08,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 992 transitions, 20528 flow [2024-01-31 16:42:11,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 992 transitions, 20380 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:42:11,401 INFO L231 Difference]: Finished difference. Result has 441 places, 612 transitions, 15408 flow [2024-01-31 16:42:11,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=13252, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=486, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=15408, PETRI_PLACES=441, PETRI_TRANSITIONS=612} [2024-01-31 16:42:11,402 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 413 predicate places. [2024-01-31 16:42:11,403 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 612 transitions, 15408 flow [2024-01-31 16:42:11,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.972222222222222) internal successors, (251), 36 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:11,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:11,403 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:11,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 16:42:11,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:11,614 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:42:11,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:11,615 INFO L85 PathProgramCache]: Analyzing trace with hash -861569681, now seen corresponding path program 3 times [2024-01-31 16:42:11,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:11,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291240613] [2024-01-31 16:42:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:11,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:11,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:11,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291240613] [2024-01-31 16:42:11,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291240613] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:11,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720334546] [2024-01-31 16:42:11,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:42:11,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:11,954 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:42:11,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-31 16:42:12,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-01-31 16:42:12,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:42:12,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-31 16:42:12,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:12,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:12,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720334546] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:12,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:12,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 31 [2024-01-31 16:42:12,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956719791] [2024-01-31 16:42:12,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:12,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-31 16:42:12,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:12,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-31 16:42:12,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2024-01-31 16:42:12,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-01-31 16:42:12,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 612 transitions, 15408 flow. Second operand has 32 states, 32 states have (on average 6.8125) internal successors, (218), 32 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:12,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:12,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-01-31 16:42:12,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:17,395 INFO L124 PetriNetUnfolderBase]: 7114/14167 cut-off events. [2024-01-31 16:42:17,396 INFO L125 PetriNetUnfolderBase]: For 433120/433126 co-relation queries the response was YES. [2024-01-31 16:42:17,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85777 conditions, 14167 events. 7114/14167 cut-off events. For 433120/433126 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 99389 event pairs, 510 based on Foata normal form. 42/14208 useless extension candidates. Maximal degree in co-relation 85615. Up to 3039 conditions per place. [2024-01-31 16:42:17,553 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 263 selfloop transitions, 535 changer transitions 121/922 dead transitions. [2024-01-31 16:42:17,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 922 transitions, 20380 flow [2024-01-31 16:42:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-01-31 16:42:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-01-31 16:42:17,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 612 transitions. [2024-01-31 16:42:17,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707692307692308 [2024-01-31 16:42:17,555 INFO L175 Difference]: Start difference. First operand has 441 places, 612 transitions, 15408 flow. Second operand 50 states and 612 transitions. [2024-01-31 16:42:17,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 922 transitions, 20380 flow [2024-01-31 16:42:20,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 922 transitions, 18867 flow, removed 230 selfloop flow, removed 48 redundant places. [2024-01-31 16:42:20,938 INFO L231 Difference]: Finished difference. Result has 440 places, 626 transitions, 15424 flow [2024-01-31 16:42:20,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=13969, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=15424, PETRI_PLACES=440, PETRI_TRANSITIONS=626} [2024-01-31 16:42:20,939 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 412 predicate places. [2024-01-31 16:42:20,939 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 626 transitions, 15424 flow [2024-01-31 16:42:20,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.8125) internal successors, (218), 32 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:20,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:20,939 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:20,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-31 16:42:21,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:21,151 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:42:21,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:21,151 INFO L85 PathProgramCache]: Analyzing trace with hash 432930039, now seen corresponding path program 4 times [2024-01-31 16:42:21,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:21,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276420635] [2024-01-31 16:42:21,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:21,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:21,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:21,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276420635] [2024-01-31 16:42:21,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276420635] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:21,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458045700] [2024-01-31 16:42:21,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:42:21,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:21,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:21,592 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:42:21,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-31 16:42:21,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:42:21,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:42:21,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-31 16:42:21,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:21,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:22,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458045700] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:22,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:22,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 29 [2024-01-31 16:42:22,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838858197] [2024-01-31 16:42:22,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:22,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 16:42:22,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:22,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 16:42:22,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2024-01-31 16:42:22,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-01-31 16:42:22,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 626 transitions, 15424 flow. Second operand has 30 states, 30 states have (on average 6.866666666666666) internal successors, (206), 30 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:22,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:22,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-01-31 16:42:22,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:26,564 INFO L124 PetriNetUnfolderBase]: 6925/13860 cut-off events. [2024-01-31 16:42:26,565 INFO L125 PetriNetUnfolderBase]: For 412384/412390 co-relation queries the response was YES. [2024-01-31 16:42:26,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83167 conditions, 13860 events. 6925/13860 cut-off events. For 412384/412390 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 97330 event pairs, 528 based on Foata normal form. 60/13919 useless extension candidates. Maximal degree in co-relation 83014. Up to 2985 conditions per place. [2024-01-31 16:42:26,708 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 248 selfloop transitions, 530 changer transitions 109/890 dead transitions. [2024-01-31 16:42:26,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 890 transitions, 19466 flow [2024-01-31 16:42:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-01-31 16:42:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-01-31 16:42:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 582 transitions. [2024-01-31 16:42:26,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-01-31 16:42:26,710 INFO L175 Difference]: Start difference. First operand has 440 places, 626 transitions, 15424 flow. Second operand 48 states and 582 transitions. [2024-01-31 16:42:26,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 890 transitions, 19466 flow [2024-01-31 16:42:29,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 890 transitions, 18310 flow, removed 63 selfloop flow, removed 47 redundant places. [2024-01-31 16:42:29,697 INFO L231 Difference]: Finished difference. Result has 439 places, 619 transitions, 15318 flow [2024-01-31 16:42:29,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=14203, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=15318, PETRI_PLACES=439, PETRI_TRANSITIONS=619} [2024-01-31 16:42:29,698 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 411 predicate places. [2024-01-31 16:42:29,698 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 619 transitions, 15318 flow [2024-01-31 16:42:29,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.866666666666666) internal successors, (206), 30 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:29,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:29,699 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:29,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-31 16:42:29,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:29,910 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:42:29,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:29,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2013828174, now seen corresponding path program 5 times [2024-01-31 16:42:29,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:29,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976142019] [2024-01-31 16:42:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:29,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 250 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 16:42:30,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:30,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976142019] [2024-01-31 16:42:30,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976142019] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:30,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855320493] [2024-01-31 16:42:30,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:42:30,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:30,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:30,047 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:42:30,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-31 16:42:30,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-01-31 16:42:30,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:42:30,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 16:42:30,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 16:42:30,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:42:30,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855320493] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:42:30,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:42:30,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2024-01-31 16:42:30,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807078322] [2024-01-31 16:42:30,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:42:30,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:42:30,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:30,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:42:30,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:42:30,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 26 [2024-01-31 16:42:30,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 619 transitions, 15318 flow. Second operand has 13 states, 13 states have (on average 14.846153846153847) internal successors, (193), 13 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:30,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:30,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 26 [2024-01-31 16:42:30,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand