./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack-1.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/stack-1.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/stack-1.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/stack-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-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:50:25,350 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:50:25,416 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:50:25,421 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:50:25,422 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:50:25,445 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:50:25,446 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:50:25,446 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:50:25,447 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:50:25,451 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:50:25,452 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:50:25,452 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:50:25,453 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:50:25,454 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:50:25,454 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:50:25,455 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:50:25,455 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:50:25,455 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:50:25,455 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:50:25,455 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:50:25,456 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:50:25,456 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:50:25,456 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:50:25,456 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:50:25,457 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:50:25,457 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:50:25,457 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:50:25,457 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:50:25,458 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:50:25,458 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:50:25,459 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:50:25,459 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:50:25,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:50:25,459 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:50:25,460 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:50:25,460 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:50:25,460 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:50:25,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:50:25,460 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:50:25,461 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:50:25,461 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:50:25,461 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:50:25,461 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:50:25,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 00:50:25,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:50:25,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:50:25,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:50:25,703 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:50:25,703 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:50:25,704 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-1.i [2024-06-28 00:50:26,865 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:50:27,078 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:50:27,079 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i [2024-06-28 00:50:27,091 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f580512a/da3d7327dc3c44d8baa9480e9e0b5793/FLAG71236d084 [2024-06-28 00:50:27,101 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f580512a/da3d7327dc3c44d8baa9480e9e0b5793 [2024-06-28 00:50:27,103 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:50:27,104 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:50:27,105 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/stack-1.yml/witness.yml [2024-06-28 00:50:27,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:50:27,175 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:50:27,176 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:50:27,176 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:50:27,180 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:50:27,180 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:50:27" (1/2) ... [2024-06-28 00:50:27,181 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cedab6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:27, skipping insertion in model container [2024-06-28 00:50:27,181 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:50:27" (1/2) ... [2024-06-28 00:50:27,182 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3c98c07b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:27, skipping insertion in model container [2024-06-28 00:50:27,182 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:50:27" (2/2) ... [2024-06-28 00:50:27,183 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cedab6a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:27, skipping insertion in model container [2024-06-28 00:50:27,183 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:50:27" (2/2) ... [2024-06-28 00:50:27,183 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:50:27,222 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:50:27,223 INFO L97 edCorrectnessWitness]: Location invariant before [L1023-L1023] (! multithreaded || (m_locked || flag == (_Bool)0)) && (! multithreaded || flag == (_Bool)0) [2024-06-28 00:50:27,223 INFO L97 edCorrectnessWitness]: Location invariant before [L1024-L1024] (! multithreaded || (m_locked || flag == (_Bool)0)) && (! multithreaded || flag == (_Bool)0) [2024-06-28 00:50:27,223 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:50:27,224 INFO L103 edCorrectnessWitness]: ghost_variable m_locked = 0 [2024-06-28 00:50:27,224 INFO L106 edCorrectnessWitness]: ghost_update [L999-L999] m_locked = 0; [2024-06-28 00:50:27,225 INFO L106 edCorrectnessWitness]: ghost_update [L994-L994] m_locked = 1; [2024-06-28 00:50:27,225 INFO L106 edCorrectnessWitness]: ghost_update [L1014-L1014] m_locked = 0; [2024-06-28 00:50:27,225 INFO L106 edCorrectnessWitness]: ghost_update [L1008-L1008] m_locked = 1; [2024-06-28 00:50:27,225 INFO L106 edCorrectnessWitness]: ghost_update [L1022-L1022] multithreaded = 1; [2024-06-28 00:50:27,265 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:50:27,564 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i[41520,41533] [2024-06-28 00:50:27,585 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:50:27,594 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local [2024-06-28 00:50:27,654 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i[41520,41533] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:50:27,666 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:50:27,706 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:50:27,707 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:27 WrapperNode [2024-06-28 00:50:27,707 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:50:27,708 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:50:27,708 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:50:27,708 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:50:27,713 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 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,733 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 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,770 INFO L138 Inliner]: procedures = 277, calls = 35, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 160 [2024-06-28 00:50:27,770 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:50:27,771 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:50:27,771 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:50:27,771 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:50:27,779 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,779 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,794 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,807 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 5, 7]. 50 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5]. The 1 writes are split as follows [0, 0, 1]. [2024-06-28 00:50:27,816 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,817 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,840 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,843 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,845 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,846 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,848 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:50:27,851 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:50:27,851 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:50:27,851 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:50:27,852 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:50:27,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:27,890 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) [2024-06-28 00:50:27,895 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 [2024-06-28 00:50:27,918 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-28 00:50:27,918 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-28 00:50:27,918 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-28 00:50:27,918 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-28 00:50:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-28 00:50:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 00:50:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 00:50:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-28 00:50:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 00:50:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 00:50:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-28 00:50:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-28 00:50:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:50:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:50:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 00:50:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-28 00:50:27,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:50:27,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:50:27,922 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:50:28,034 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:50:28,036 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:50:28,207 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:50:28,208 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:50:28,376 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:50:28,377 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-28 00:50:28,377 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:50:28 BoogieIcfgContainer [2024-06-28 00:50:28,377 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:50:28,379 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:50:28,379 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:50:28,381 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:50:28,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:50:27" (1/4) ... [2024-06-28 00:50:28,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b35da2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:50:28, skipping insertion in model container [2024-06-28 00:50:28,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:50:27" (2/4) ... [2024-06-28 00:50:28,383 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b35da2c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:50:28, skipping insertion in model container [2024-06-28 00:50:28,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:27" (3/4) ... [2024-06-28 00:50:28,383 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b35da2c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:50:28, skipping insertion in model container [2024-06-28 00:50:28,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:50:28" (4/4) ... [2024-06-28 00:50:28,384 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2024-06-28 00:50:28,398 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:50:28,399 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 00:50:28,399 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:50:28,461 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-28 00:50:28,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 39 transitions, 92 flow [2024-06-28 00:50:28,517 INFO L124 PetriNetUnfolderBase]: 5/37 cut-off events. [2024-06-28 00:50:28,518 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-28 00:50:28,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 37 events. 5/37 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 70 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2024-06-28 00:50:28,522 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 39 transitions, 92 flow [2024-06-28 00:50:28,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 35 transitions, 79 flow [2024-06-28 00:50:28,538 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:50:28,543 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;@65aba898, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:50:28,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-28 00:50:28,546 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:50:28,547 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:50:28,547 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:50:28,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:28,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:50:28,548 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-28 00:50:28,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:28,588 INFO L85 PathProgramCache]: Analyzing trace with hash 402773439, now seen corresponding path program 1 times [2024-06-28 00:50:28,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:28,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445506358] [2024-06-28 00:50:28,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:28,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:28,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:28,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445506358] [2024-06-28 00:50:28,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445506358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:28,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:28,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:50:28,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553894895] [2024-06-28 00:50:28,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:28,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:50:28,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:28,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:50:28,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:50:28,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-06-28 00:50:28,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2024-06-28 00:50:28,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:28,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-06-28 00:50:28,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:29,107 INFO L124 PetriNetUnfolderBase]: 231/459 cut-off events. [2024-06-28 00:50:29,107 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-28 00:50:29,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876 conditions, 459 events. 231/459 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2129 event pairs, 178 based on Foata normal form. 100/498 useless extension candidates. Maximal degree in co-relation 822. Up to 387 conditions per place. [2024-06-28 00:50:29,114 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 22 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2024-06-28 00:50:29,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 117 flow [2024-06-28 00:50:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:50:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:50:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2024-06-28 00:50:29,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-28 00:50:29,126 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 79 flow. Second operand 3 states and 57 transitions. [2024-06-28 00:50:29,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 117 flow [2024-06-28 00:50:29,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 112 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:50:29,131 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 68 flow [2024-06-28 00:50:29,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2024-06-28 00:50:29,135 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2024-06-28 00:50:29,135 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 68 flow [2024-06-28 00:50:29,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2024-06-28 00:50:29,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:29,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:29,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:50:29,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-28 00:50:29,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:29,139 INFO L85 PathProgramCache]: Analyzing trace with hash 783660967, now seen corresponding path program 1 times [2024-06-28 00:50:29,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:29,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591358595] [2024-06-28 00:50:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:29,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:29,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:29,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591358595] [2024-06-28 00:50:29,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591358595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:29,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:29,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:50:29,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602778208] [2024-06-28 00:50:29,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:29,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:50:29,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:29,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:50:29,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:50:29,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 00:50:29,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2024-06-28 00:50:29,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:29,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 00:50:29,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:29,435 INFO L124 PetriNetUnfolderBase]: 319/607 cut-off events. [2024-06-28 00:50:29,436 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-28 00:50:29,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 607 events. 319/607 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2806 event pairs, 56 based on Foata normal form. 5/565 useless extension candidates. Maximal degree in co-relation 1167. Up to 373 conditions per place. [2024-06-28 00:50:29,440 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 44 selfloop transitions, 3 changer transitions 2/57 dead transitions. [2024-06-28 00:50:29,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 223 flow [2024-06-28 00:50:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:50:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:50:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-28 00:50:29,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-28 00:50:29,446 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 68 flow. Second operand 4 states and 99 transitions. [2024-06-28 00:50:29,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 223 flow [2024-06-28 00:50:29,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:50:29,453 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 89 flow [2024-06-28 00:50:29,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2024-06-28 00:50:29,454 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2024-06-28 00:50:29,454 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 89 flow [2024-06-28 00:50:29,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2024-06-28 00:50:29,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:29,455 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:29,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:50:29,455 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-28 00:50:29,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:29,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1184116930, now seen corresponding path program 1 times [2024-06-28 00:50:29,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:29,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077262274] [2024-06-28 00:50:29,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:29,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:29,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:29,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077262274] [2024-06-28 00:50:29,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077262274] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:29,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989345207] [2024-06-28 00:50:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:29,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:29,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:29,673 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) [2024-06-28 00:50:29,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-28 00:50:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:29,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-28 00:50:29,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:29,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-28 00:50:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:29,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:30,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989345207] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:30,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:30,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-06-28 00:50:30,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900081986] [2024-06-28 00:50:30,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:30,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:50:30,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:30,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:50:30,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:50:30,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:50:30,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 89 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:50:30,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:30,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:50:30,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:30,478 INFO L124 PetriNetUnfolderBase]: 1287/2419 cut-off events. [2024-06-28 00:50:30,478 INFO L125 PetriNetUnfolderBase]: For 306/308 co-relation queries the response was YES. [2024-06-28 00:50:30,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5081 conditions, 2419 events. 1287/2419 cut-off events. For 306/308 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 13254 event pairs, 156 based on Foata normal form. 48/2357 useless extension candidates. Maximal degree in co-relation 5072. Up to 380 conditions per place. [2024-06-28 00:50:30,490 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 172 selfloop transitions, 32 changer transitions 4/215 dead transitions. [2024-06-28 00:50:30,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 215 transitions, 941 flow [2024-06-28 00:50:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 00:50:30,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 00:50:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 382 transitions. [2024-06-28 00:50:30,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.652991452991453 [2024-06-28 00:50:30,495 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 89 flow. Second operand 15 states and 382 transitions. [2024-06-28 00:50:30,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 215 transitions, 941 flow [2024-06-28 00:50:30,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 215 transitions, 937 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:50:30,500 INFO L231 Difference]: Finished difference. Result has 58 places, 69 transitions, 336 flow [2024-06-28 00:50:30,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=336, PETRI_PLACES=58, PETRI_TRANSITIONS=69} [2024-06-28 00:50:30,501 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2024-06-28 00:50:30,501 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 69 transitions, 336 flow [2024-06-28 00:50:30,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:50:30,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:30,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:30,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-28 00:50:30,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:30,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-28 00:50:30,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:30,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2037359109, now seen corresponding path program 1 times [2024-06-28 00:50:30,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:30,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608557518] [2024-06-28 00:50:30,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:30,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:30,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:30,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608557518] [2024-06-28 00:50:30,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608557518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:30,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:30,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:50:30,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57552131] [2024-06-28 00:50:30,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:30,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:50:30,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:30,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:50:30,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:50:30,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 00:50:30,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 69 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-06-28 00:50:30,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:30,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 00:50:30,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:30,944 INFO L124 PetriNetUnfolderBase]: 699/1431 cut-off events. [2024-06-28 00:50:30,944 INFO L125 PetriNetUnfolderBase]: For 648/648 co-relation queries the response was YES. [2024-06-28 00:50:30,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3236 conditions, 1431 events. 699/1431 cut-off events. For 648/648 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7599 event pairs, 245 based on Foata normal form. 66/1477 useless extension candidates. Maximal degree in co-relation 3219. Up to 665 conditions per place. [2024-06-28 00:50:30,950 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 45 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-06-28 00:50:30,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 352 flow [2024-06-28 00:50:30,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:50:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:50:30,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-28 00:50:30,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-28 00:50:30,952 INFO L175 Difference]: Start difference. First operand has 58 places, 69 transitions, 336 flow. Second operand 3 states and 72 transitions. [2024-06-28 00:50:30,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 352 flow [2024-06-28 00:50:30,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 320 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 00:50:30,960 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 205 flow [2024-06-28 00:50:30,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-06-28 00:50:30,960 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 17 predicate places. [2024-06-28 00:50:30,961 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 205 flow [2024-06-28 00:50:30,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-06-28 00:50:30,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:30,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:30,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:50:30,961 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-28 00:50:30,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:30,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1374515132, now seen corresponding path program 1 times [2024-06-28 00:50:30,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:30,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432991778] [2024-06-28 00:50:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:30,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:31,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:31,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432991778] [2024-06-28 00:50:31,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432991778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:31,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:31,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:50:31,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245647132] [2024-06-28 00:50:31,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:31,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:50:31,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:31,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:50:31,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:50:31,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 00:50:31,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2024-06-28 00:50:31,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:31,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 00:50:31,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:31,489 INFO L124 PetriNetUnfolderBase]: 870/1774 cut-off events. [2024-06-28 00:50:31,490 INFO L125 PetriNetUnfolderBase]: For 616/616 co-relation queries the response was YES. [2024-06-28 00:50:31,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4048 conditions, 1774 events. 870/1774 cut-off events. For 616/616 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 9535 event pairs, 263 based on Foata normal form. 0/1749 useless extension candidates. Maximal degree in co-relation 4033. Up to 1012 conditions per place. [2024-06-28 00:50:31,498 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 64 selfloop transitions, 7 changer transitions 4/89 dead transitions. [2024-06-28 00:50:31,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 89 transitions, 468 flow [2024-06-28 00:50:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:50:31,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:50:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-28 00:50:31,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-28 00:50:31,499 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 205 flow. Second operand 5 states and 120 transitions. [2024-06-28 00:50:31,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 89 transitions, 468 flow [2024-06-28 00:50:31,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 89 transitions, 457 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:50:31,505 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 261 flow [2024-06-28 00:50:31,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-28 00:50:31,507 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 23 predicate places. [2024-06-28 00:50:31,507 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 261 flow [2024-06-28 00:50:31,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2024-06-28 00:50:31,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:31,507 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:31,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:50:31,508 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-28 00:50:31,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:31,508 INFO L85 PathProgramCache]: Analyzing trace with hash 260817475, now seen corresponding path program 1 times [2024-06-28 00:50:31,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:31,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014934176] [2024-06-28 00:50:31,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:31,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:32,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:32,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014934176] [2024-06-28 00:50:32,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014934176] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:32,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565202750] [2024-06-28 00:50:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:32,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:32,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:32,017 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) [2024-06-28 00:50:32,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-28 00:50:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:32,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-28 00:50:32,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:32,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-28 00:50:32,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-06-28 00:50:32,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2024-06-28 00:50:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:32,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:32,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2024-06-28 00:50:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:32,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565202750] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:32,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:32,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-06-28 00:50:32,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597165295] [2024-06-28 00:50:32,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:32,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-28 00:50:32,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:32,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-28 00:50:32,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-06-28 00:50:32,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:50:32,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 261 flow. Second operand has 15 states, 15 states have (on average 14.8) internal successors, (222), 15 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) [2024-06-28 00:50:32,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:32,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:50:32,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:33,559 INFO L124 PetriNetUnfolderBase]: 1843/3679 cut-off events. [2024-06-28 00:50:33,559 INFO L125 PetriNetUnfolderBase]: For 1712/1712 co-relation queries the response was YES. [2024-06-28 00:50:33,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8368 conditions, 3679 events. 1843/3679 cut-off events. For 1712/1712 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 20693 event pairs, 360 based on Foata normal form. 14/3622 useless extension candidates. Maximal degree in co-relation 8348. Up to 587 conditions per place. [2024-06-28 00:50:33,572 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 210 selfloop transitions, 54 changer transitions 20/291 dead transitions. [2024-06-28 00:50:33,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 291 transitions, 1557 flow [2024-06-28 00:50:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-28 00:50:33,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-28 00:50:33,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 524 transitions. [2024-06-28 00:50:33,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5841694537346711 [2024-06-28 00:50:33,575 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 261 flow. Second operand 23 states and 524 transitions. [2024-06-28 00:50:33,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 291 transitions, 1557 flow [2024-06-28 00:50:33,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 291 transitions, 1547 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-28 00:50:33,584 INFO L231 Difference]: Finished difference. Result has 87 places, 94 transitions, 567 flow [2024-06-28 00:50:33,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=567, PETRI_PLACES=87, PETRI_TRANSITIONS=94} [2024-06-28 00:50:33,584 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 50 predicate places. [2024-06-28 00:50:33,584 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 94 transitions, 567 flow [2024-06-28 00:50:33,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.8) internal successors, (222), 15 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) [2024-06-28 00:50:33,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:33,585 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:33,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-28 00:50:33,817 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,SelfDestructingSolverStorable5 [2024-06-28 00:50:33,817 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-28 00:50:33,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:33,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1799931214, now seen corresponding path program 1 times [2024-06-28 00:50:33,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:33,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512785666] [2024-06-28 00:50:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:33,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 00:50:33,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:33,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512785666] [2024-06-28 00:50:33,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512785666] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:33,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983211573] [2024-06-28 00:50:33,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:33,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:33,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:33,973 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) [2024-06-28 00:50:33,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-28 00:50:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:34,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 00:50:34,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:34,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-28 00:50:34,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-28 00:50:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:34,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 00:50:34,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983211573] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:34,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:34,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2024-06-28 00:50:34,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069241534] [2024-06-28 00:50:34,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:34,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 00:50:34,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:34,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 00:50:34,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-06-28 00:50:34,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:50:34,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 94 transitions, 567 flow. Second operand has 12 states, 12 states have (on average 16.666666666666668) internal successors, (200), 12 states have internal predecessors, (200), 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) [2024-06-28 00:50:34,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:34,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:50:34,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:35,231 INFO L124 PetriNetUnfolderBase]: 2893/5742 cut-off events. [2024-06-28 00:50:35,231 INFO L125 PetriNetUnfolderBase]: For 5186/5186 co-relation queries the response was YES. [2024-06-28 00:50:35,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13696 conditions, 5742 events. 2893/5742 cut-off events. For 5186/5186 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 33523 event pairs, 422 based on Foata normal form. 66/5744 useless extension candidates. Maximal degree in co-relation 13669. Up to 929 conditions per place. [2024-06-28 00:50:35,261 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 199 selfloop transitions, 91 changer transitions 8/305 dead transitions. [2024-06-28 00:50:35,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 305 transitions, 1921 flow [2024-06-28 00:50:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 00:50:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 00:50:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 437 transitions. [2024-06-28 00:50:35,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-28 00:50:35,263 INFO L175 Difference]: Start difference. First operand has 87 places, 94 transitions, 567 flow. Second operand 19 states and 437 transitions. [2024-06-28 00:50:35,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 305 transitions, 1921 flow [2024-06-28 00:50:35,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 305 transitions, 1887 flow, removed 17 selfloop flow, removed 0 redundant places. [2024-06-28 00:50:35,296 INFO L231 Difference]: Finished difference. Result has 111 places, 136 transitions, 1080 flow [2024-06-28 00:50:35,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1080, PETRI_PLACES=111, PETRI_TRANSITIONS=136} [2024-06-28 00:50:35,297 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 74 predicate places. [2024-06-28 00:50:35,297 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 136 transitions, 1080 flow [2024-06-28 00:50:35,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.666666666666668) internal successors, (200), 12 states have internal predecessors, (200), 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) [2024-06-28 00:50:35,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:35,298 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:35,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-28 00:50:35,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:35,510 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-28 00:50:35,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:35,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1464249392, now seen corresponding path program 1 times [2024-06-28 00:50:35,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:35,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036904053] [2024-06-28 00:50:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:35,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:36,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:36,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036904053] [2024-06-28 00:50:36,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036904053] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:36,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264585304] [2024-06-28 00:50:36,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:36,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:36,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:36,059 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) [2024-06-28 00:50:36,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-28 00:50:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:36,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-28 00:50:36,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:36,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-28 00:50:36,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2024-06-28 00:50:36,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2024-06-28 00:50:36,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:50:36,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 43 [2024-06-28 00:50:36,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:50:36,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 57 [2024-06-28 00:50:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:36,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:37,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:50:37,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 14 [2024-06-28 00:50:37,134 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-06-28 00:50:37,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 68 [2024-06-28 00:50:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:37,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264585304] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:37,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:37,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-06-28 00:50:37,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192684816] [2024-06-28 00:50:37,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:37,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-28 00:50:37,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:37,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-28 00:50:37,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-06-28 00:50:37,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:50:37,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 136 transitions, 1080 flow. Second operand has 17 states, 17 states have (on average 15.235294117647058) internal successors, (259), 17 states have internal predecessors, (259), 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) [2024-06-28 00:50:37,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:37,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:50:37,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:39,190 INFO L124 PetriNetUnfolderBase]: 3518/6932 cut-off events. [2024-06-28 00:50:39,191 INFO L125 PetriNetUnfolderBase]: For 9553/9553 co-relation queries the response was YES. [2024-06-28 00:50:39,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17621 conditions, 6932 events. 3518/6932 cut-off events. For 9553/9553 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 41390 event pairs, 792 based on Foata normal form. 49/6903 useless extension candidates. Maximal degree in co-relation 17586. Up to 1136 conditions per place. [2024-06-28 00:50:39,224 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 218 selfloop transitions, 109 changer transitions 36/370 dead transitions. [2024-06-28 00:50:39,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 370 transitions, 2630 flow [2024-06-28 00:50:39,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-28 00:50:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-28 00:50:39,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 549 transitions. [2024-06-28 00:50:39,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563076923076923 [2024-06-28 00:50:39,226 INFO L175 Difference]: Start difference. First operand has 111 places, 136 transitions, 1080 flow. Second operand 25 states and 549 transitions. [2024-06-28 00:50:39,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 370 transitions, 2630 flow [2024-06-28 00:50:39,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 370 transitions, 2562 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-28 00:50:39,259 INFO L231 Difference]: Finished difference. Result has 137 places, 160 transitions, 1498 flow [2024-06-28 00:50:39,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1498, PETRI_PLACES=137, PETRI_TRANSITIONS=160} [2024-06-28 00:50:39,260 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 100 predicate places. [2024-06-28 00:50:39,260 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 160 transitions, 1498 flow [2024-06-28 00:50:39,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.235294117647058) internal successors, (259), 17 states have internal predecessors, (259), 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) [2024-06-28 00:50:39,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:39,261 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:39,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-28 00:50:39,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:39,474 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-28 00:50:39,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:39,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1937155437, now seen corresponding path program 2 times [2024-06-28 00:50:39,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:39,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581994610] [2024-06-28 00:50:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:39,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:39,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:39,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581994610] [2024-06-28 00:50:39,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581994610] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:39,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340337776] [2024-06-28 00:50:39,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 00:50:39,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:39,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:39,642 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) [2024-06-28 00:50:39,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-28 00:50:39,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 00:50:39,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 00:50:39,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-28 00:50:39,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:39,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-28 00:50:39,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-28 00:50:39,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-28 00:50:39,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-28 00:50:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:39,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:40,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340337776] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:40,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:40,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-06-28 00:50:40,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56368480] [2024-06-28 00:50:40,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:40,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-28 00:50:40,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:40,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-28 00:50:40,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2024-06-28 00:50:40,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:50:40,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 160 transitions, 1498 flow. Second operand has 19 states, 19 states have (on average 14.894736842105264) internal successors, (283), 19 states have internal predecessors, (283), 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) [2024-06-28 00:50:40,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:40,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:50:40,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:41,569 INFO L124 PetriNetUnfolderBase]: 5622/11142 cut-off events. [2024-06-28 00:50:41,569 INFO L125 PetriNetUnfolderBase]: For 23071/23071 co-relation queries the response was YES. [2024-06-28 00:50:41,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29833 conditions, 11142 events. 5622/11142 cut-off events. For 23071/23071 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 73365 event pairs, 1470 based on Foata normal form. 168/11274 useless extension candidates. Maximal degree in co-relation 29794. Up to 1851 conditions per place. [2024-06-28 00:50:41,644 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 229 selfloop transitions, 187 changer transitions 2/425 dead transitions. [2024-06-28 00:50:41,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 425 transitions, 3759 flow [2024-06-28 00:50:41,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-28 00:50:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-28 00:50:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 469 transitions. [2024-06-28 00:50:41,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726495726495726 [2024-06-28 00:50:41,663 INFO L175 Difference]: Start difference. First operand has 137 places, 160 transitions, 1498 flow. Second operand 21 states and 469 transitions. [2024-06-28 00:50:41,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 425 transitions, 3759 flow [2024-06-28 00:50:41,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 425 transitions, 3633 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-28 00:50:41,762 INFO L231 Difference]: Finished difference. Result has 158 places, 249 transitions, 2765 flow [2024-06-28 00:50:41,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2765, PETRI_PLACES=158, PETRI_TRANSITIONS=249} [2024-06-28 00:50:41,763 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 121 predicate places. [2024-06-28 00:50:41,763 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 249 transitions, 2765 flow [2024-06-28 00:50:41,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 14.894736842105264) internal successors, (283), 19 states have internal predecessors, (283), 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) [2024-06-28 00:50:41,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:41,764 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:41,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-28 00:50:41,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:41,977 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-28 00:50:41,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:41,977 INFO L85 PathProgramCache]: Analyzing trace with hash 803533486, now seen corresponding path program 3 times [2024-06-28 00:50:41,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:41,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37453145] [2024-06-28 00:50:41,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:41,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 55 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:42,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:42,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37453145] [2024-06-28 00:50:42,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37453145] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:42,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817023173] [2024-06-28 00:50:42,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 00:50:42,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:42,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:42,097 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) [2024-06-28 00:50:42,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-28 00:50:42,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-06-28 00:50:42,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 00:50:42,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-28 00:50:42,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:42,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-28 00:50:42,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817023173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:42,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-28 00:50:42,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2024-06-28 00:50:42,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005677647] [2024-06-28 00:50:42,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:42,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:50:42,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:42,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:50:42,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:50:42,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:50:42,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 249 transitions, 2765 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 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) [2024-06-28 00:50:42,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:42,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:50:42,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:43,744 INFO L124 PetriNetUnfolderBase]: 6573/12292 cut-off events. [2024-06-28 00:50:43,744 INFO L125 PetriNetUnfolderBase]: For 22261/22263 co-relation queries the response was YES. [2024-06-28 00:50:43,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32899 conditions, 12292 events. 6573/12292 cut-off events. For 22261/22263 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 82271 event pairs, 409 based on Foata normal form. 2/11665 useless extension candidates. Maximal degree in co-relation 32851. Up to 3819 conditions per place. [2024-06-28 00:50:43,810 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 242 selfloop transitions, 10 changer transitions 101/377 dead transitions. [2024-06-28 00:50:43,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 377 transitions, 4158 flow [2024-06-28 00:50:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:50:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:50:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-28 00:50:43,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:50:43,812 INFO L175 Difference]: Start difference. First operand has 158 places, 249 transitions, 2765 flow. Second operand 8 states and 208 transitions. [2024-06-28 00:50:43,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 377 transitions, 4158 flow [2024-06-28 00:50:43,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 377 transitions, 3554 flow, removed 53 selfloop flow, removed 31 redundant places. [2024-06-28 00:50:43,899 INFO L231 Difference]: Finished difference. Result has 133 places, 125 transitions, 970 flow [2024-06-28 00:50:43,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=970, PETRI_PLACES=133, PETRI_TRANSITIONS=125} [2024-06-28 00:50:43,901 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 96 predicate places. [2024-06-28 00:50:43,901 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 125 transitions, 970 flow [2024-06-28 00:50:43,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 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) [2024-06-28 00:50:43,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:43,901 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:43,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-28 00:50:44,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:44,114 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-28 00:50:44,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:44,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1327042990, now seen corresponding path program 2 times [2024-06-28 00:50:44,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:44,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439095895] [2024-06-28 00:50:44,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:44,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:45,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:45,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439095895] [2024-06-28 00:50:45,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439095895] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:45,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436827670] [2024-06-28 00:50:45,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 00:50:45,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:45,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:45,041 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) [2024-06-28 00:50:45,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-28 00:50:45,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 00:50:45,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 00:50:45,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-28 00:50:45,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:45,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-28 00:50:45,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 50 [2024-06-28 00:50:45,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 72 [2024-06-28 00:50:45,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2024-06-28 00:50:45,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 95 [2024-06-28 00:50:45,489 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:50:45,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 111 [2024-06-28 00:50:45,523 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:50:45,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 69 [2024-06-28 00:50:46,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:50:46,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 227 treesize of output 107 [2024-06-28 00:50:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:46,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:47,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436827670] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:47,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:47,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2024-06-28 00:50:47,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924877353] [2024-06-28 00:50:47,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:47,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-28 00:50:47,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:47,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-28 00:50:47,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2024-06-28 00:50:47,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:50:47,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 125 transitions, 970 flow. Second operand has 27 states, 27 states have (on average 14.777777777777779) internal successors, (399), 27 states have internal predecessors, (399), 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) [2024-06-28 00:50:47,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:47,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:50:47,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:49,854 INFO L124 PetriNetUnfolderBase]: 4553/9133 cut-off events. [2024-06-28 00:50:49,854 INFO L125 PetriNetUnfolderBase]: For 18880/19268 co-relation queries the response was YES. [2024-06-28 00:50:49,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25405 conditions, 9133 events. 4553/9133 cut-off events. For 18880/19268 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 61880 event pairs, 556 based on Foata normal form. 171/9285 useless extension candidates. Maximal degree in co-relation 25373. Up to 1565 conditions per place. [2024-06-28 00:50:49,892 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 184 selfloop transitions, 44 changer transitions 247/481 dead transitions. [2024-06-28 00:50:49,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 481 transitions, 3435 flow [2024-06-28 00:50:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-06-28 00:50:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-06-28 00:50:49,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 647 transitions. [2024-06-28 00:50:49,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5184294871794872 [2024-06-28 00:50:49,894 INFO L175 Difference]: Start difference. First operand has 133 places, 125 transitions, 970 flow. Second operand 32 states and 647 transitions. [2024-06-28 00:50:49,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 481 transitions, 3435 flow [2024-06-28 00:50:49,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 481 transitions, 3364 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-28 00:50:49,929 INFO L231 Difference]: Finished difference. Result has 152 places, 88 transitions, 718 flow [2024-06-28 00:50:49,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=718, PETRI_PLACES=152, PETRI_TRANSITIONS=88} [2024-06-28 00:50:49,930 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 115 predicate places. [2024-06-28 00:50:49,930 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 88 transitions, 718 flow [2024-06-28 00:50:49,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 14.777777777777779) internal successors, (399), 27 states have internal predecessors, (399), 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) [2024-06-28 00:50:49,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:49,931 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:49,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-28 00:50:50,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:50,143 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-28 00:50:50,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:50,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1610646762, now seen corresponding path program 3 times [2024-06-28 00:50:50,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:50,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44567927] [2024-06-28 00:50:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:50,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:51,184 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:51,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:51,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44567927] [2024-06-28 00:50:51,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44567927] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:51,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162858048] [2024-06-28 00:50:51,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 00:50:51,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:51,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:51,186 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) [2024-06-28 00:50:51,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-28 00:50:51,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-28 00:50:51,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 00:50:51,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 24 conjunts are in the unsatisfiable core [2024-06-28 00:50:51,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:51,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-28 00:50:51,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2024-06-28 00:50:51,510 INFO L349 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2024-06-28 00:50:51,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 80 [2024-06-28 00:50:51,534 INFO L349 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2024-06-28 00:50:51,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 42 [2024-06-28 00:50:51,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 131 [2024-06-28 00:50:51,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:50:51,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 135 [2024-06-28 00:50:51,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 91 [2024-06-28 00:50:52,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 287 treesize of output 118 [2024-06-28 00:50:56,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:50:56,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 245 treesize of output 113 [2024-06-28 00:50:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:56,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:57,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162858048] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:57,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:57,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-06-28 00:50:57,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165797621] [2024-06-28 00:50:57,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:57,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-28 00:50:57,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:57,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-28 00:50:57,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2024-06-28 00:50:57,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:50:57,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 88 transitions, 718 flow. Second operand has 31 states, 31 states have (on average 15.258064516129032) internal successors, (473), 31 states have internal predecessors, (473), 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) [2024-06-28 00:50:57,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:57,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:50:57,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:01,049 INFO L124 PetriNetUnfolderBase]: 2226/4727 cut-off events. [2024-06-28 00:51:01,049 INFO L125 PetriNetUnfolderBase]: For 12519/12597 co-relation queries the response was YES. [2024-06-28 00:51:01,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13509 conditions, 4727 events. 2226/4727 cut-off events. For 12519/12597 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 28745 event pairs, 179 based on Foata normal form. 39/4761 useless extension candidates. Maximal degree in co-relation 13464. Up to 848 conditions per place. [2024-06-28 00:51:01,070 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 116 selfloop transitions, 15 changer transitions 255/392 dead transitions. [2024-06-28 00:51:01,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 392 transitions, 2701 flow [2024-06-28 00:51:01,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-06-28 00:51:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-06-28 00:51:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 722 transitions. [2024-06-28 00:51:01,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5003465003465003 [2024-06-28 00:51:01,073 INFO L175 Difference]: Start difference. First operand has 152 places, 88 transitions, 718 flow. Second operand 37 states and 722 transitions. [2024-06-28 00:51:01,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 392 transitions, 2701 flow [2024-06-28 00:51:01,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 392 transitions, 2459 flow, removed 58 selfloop flow, removed 33 redundant places. [2024-06-28 00:51:01,098 INFO L231 Difference]: Finished difference. Result has 147 places, 48 transitions, 301 flow [2024-06-28 00:51:01,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=301, PETRI_PLACES=147, PETRI_TRANSITIONS=48} [2024-06-28 00:51:01,099 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 110 predicate places. [2024-06-28 00:51:01,099 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 48 transitions, 301 flow [2024-06-28 00:51:01,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 15.258064516129032) internal successors, (473), 31 states have internal predecessors, (473), 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) [2024-06-28 00:51:01,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:01,100 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:01,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-28 00:51:01,312 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,SelfDestructingSolverStorable11 [2024-06-28 00:51:01,312 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-28 00:51:01,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:01,313 INFO L85 PathProgramCache]: Analyzing trace with hash 584915566, now seen corresponding path program 4 times [2024-06-28 00:51:01,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:01,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405465563] [2024-06-28 00:51:01,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:01,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 58 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:02,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:02,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405465563] [2024-06-28 00:51:02,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405465563] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:51:02,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205023582] [2024-06-28 00:51:02,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 00:51:02,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:51:02,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:51:02,708 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) [2024-06-28 00:51:02,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-28 00:51:02,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 00:51:02,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 00:51:02,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-28 00:51:02,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:51:02,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-28 00:51:02,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 50 [2024-06-28 00:51:02,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 72 [2024-06-28 00:51:03,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 31 [2024-06-28 00:51:03,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 95 [2024-06-28 00:51:03,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:51:03,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 111 [2024-06-28 00:51:03,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2024-06-28 00:51:03,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 185 [2024-06-28 00:51:03,502 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:51:03,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 185 treesize of output 175 [2024-06-28 00:51:03,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 158 [2024-06-28 00:51:04,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 465 treesize of output 365 [2024-06-28 00:51:04,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:51:04,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 365 treesize of output 289 [2024-06-28 00:51:04,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 391 treesize of output 313 [2024-06-28 00:51:17,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:51:17,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 911 treesize of output 407 [2024-06-28 00:51:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:17,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:51:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 12 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:18,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205023582] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:51:18,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:51:18,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 38 [2024-06-28 00:51:18,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413666642] [2024-06-28 00:51:18,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:51:18,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-06-28 00:51:18,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:18,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-06-28 00:51:18,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2024-06-28 00:51:18,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:51:18,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 48 transitions, 301 flow. Second operand has 38 states, 38 states have (on average 15.263157894736842) internal successors, (580), 38 states have internal predecessors, (580), 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) [2024-06-28 00:51:18,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:18,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:51:18,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:20,631 INFO L124 PetriNetUnfolderBase]: 510/1120 cut-off events. [2024-06-28 00:51:20,631 INFO L125 PetriNetUnfolderBase]: For 1741/1741 co-relation queries the response was YES. [2024-06-28 00:51:20,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3052 conditions, 1120 events. 510/1120 cut-off events. For 1741/1741 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4024 event pairs, 53 based on Foata normal form. 14/1129 useless extension candidates. Maximal degree in co-relation 3027. Up to 174 conditions per place. [2024-06-28 00:51:20,634 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 0 selfloop transitions, 0 changer transitions 152/152 dead transitions. [2024-06-28 00:51:20,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 152 transitions, 878 flow [2024-06-28 00:51:20,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 00:51:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 00:51:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 358 transitions. [2024-06-28 00:51:20,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48313090418353577 [2024-06-28 00:51:20,636 INFO L175 Difference]: Start difference. First operand has 147 places, 48 transitions, 301 flow. Second operand 19 states and 358 transitions. [2024-06-28 00:51:20,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 152 transitions, 878 flow [2024-06-28 00:51:20,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 152 transitions, 776 flow, removed 12 selfloop flow, removed 42 redundant places. [2024-06-28 00:51:20,640 INFO L231 Difference]: Finished difference. Result has 81 places, 0 transitions, 0 flow [2024-06-28 00:51:20,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=0, PETRI_PLACES=81, PETRI_TRANSITIONS=0} [2024-06-28 00:51:20,641 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 44 predicate places. [2024-06-28 00:51:20,641 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 0 transitions, 0 flow [2024-06-28 00:51:20,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 15.263157894736842) internal successors, (580), 38 states have internal predecessors, (580), 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) [2024-06-28 00:51:20,645 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 8 remaining) [2024-06-28 00:51:20,645 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 8 remaining) [2024-06-28 00:51:20,645 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2024-06-28 00:51:20,646 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 8 remaining) [2024-06-28 00:51:20,646 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2024-06-28 00:51:20,646 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-06-28 00:51:20,646 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-06-28 00:51:20,646 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-06-28 00:51:20,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-28 00:51:20,858 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,SelfDestructingSolverStorable12 [2024-06-28 00:51:20,858 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:20,862 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-28 00:51:20,863 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-28 00:51:20,866 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-28 00:51:20,866 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-28 00:51:20,867 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.06 12:51:20 BasicIcfg [2024-06-28 00:51:20,867 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-28 00:51:20,867 INFO L158 Benchmark]: Toolchain (without parser) took 53692.43ms. Allocated memory was 228.6MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 150.8MB in the beginning and 1.0GB in the end (delta: -862.2MB). Peak memory consumption was 622.0MB. Max. memory is 16.1GB. [2024-06-28 00:51:20,867 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 163.6MB. Free memory is still 133.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 00:51:20,867 INFO L158 Benchmark]: Witness Parser took 0.13ms. Allocated memory is still 228.6MB. Free memory was 154.0MB in the beginning and 153.6MB in the end (delta: 377.6kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 00:51:20,869 INFO L158 Benchmark]: CACSL2BoogieTranslator took 531.78ms. Allocated memory is still 228.6MB. Free memory was 150.4MB in the beginning and 113.3MB in the end (delta: 37.1MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2024-06-28 00:51:20,869 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.14ms. Allocated memory is still 228.6MB. Free memory was 113.3MB in the beginning and 110.6MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-28 00:51:20,870 INFO L158 Benchmark]: Boogie Preprocessor took 76.72ms. Allocated memory is still 228.6MB. Free memory was 110.6MB in the beginning and 107.9MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-28 00:51:20,870 INFO L158 Benchmark]: RCFGBuilder took 526.57ms. Allocated memory is still 228.6MB. Free memory was 107.9MB in the beginning and 164.5MB in the end (delta: -56.6MB). Peak memory consumption was 29.8MB. Max. memory is 16.1GB. [2024-06-28 00:51:20,871 INFO L158 Benchmark]: TraceAbstraction took 52487.86ms. Allocated memory was 228.6MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 163.4MB in the beginning and 1.0GB in the end (delta: -849.5MB). Peak memory consumption was 632.1MB. Max. memory is 16.1GB. [2024-06-28 00:51:20,873 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 163.6MB. Free memory is still 133.6MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.13ms. Allocated memory is still 228.6MB. Free memory was 154.0MB in the beginning and 153.6MB in the end (delta: 377.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 531.78ms. Allocated memory is still 228.6MB. Free memory was 150.4MB in the beginning and 113.3MB in the end (delta: 37.1MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.14ms. Allocated memory is still 228.6MB. Free memory was 113.3MB in the beginning and 110.6MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 76.72ms. Allocated memory is still 228.6MB. Free memory was 110.6MB in the beginning and 107.9MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 526.57ms. Allocated memory is still 228.6MB. Free memory was 107.9MB in the beginning and 164.5MB in the end (delta: -56.6MB). Peak memory consumption was 29.8MB. Max. memory is 16.1GB. * TraceAbstraction took 52487.86ms. Allocated memory was 228.6MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 163.4MB in the beginning and 1.0GB in the end (delta: -849.5MB). Peak memory consumption was 632.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1023]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1024]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 941]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 941]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 58 locations, 8 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 52.4s, OverallIterations: 13, TraceHistogramMax: 6, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 17.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3335 SdHoareTripleChecker+Valid, 5.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3327 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 4.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 268 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8522 IncrementalHoareTripleChecker+Invalid, 8790 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 268 mSolverCounterUnsat, 0 mSDtfsCounter, 8522 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 902 GetRequests, 604 SyntacticMatches, 3 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2765occurred in iteration=9, InterpolantAutomatonStates: 214, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 31.3s InterpolantComputationTime, 748 NumberOfCodeBlocks, 748 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1028 ConstructedInterpolants, 10 QuantifiedInterpolants, 66978 SizeOfPredicates, 115 NumberOfNonLiveVariables, 2305 ConjunctsInSsa, 137 ConjunctsInUnsatCore, 30 InterpolantComputations, 5 PerfectInterpolantSequences, 287/1075 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-28 00:51:20,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE