./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/parallel-lamport.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/parallel-lamport.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:27:05,830 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:27:05,907 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:27:05,911 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:27:05,911 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:27:05,929 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:27:05,930 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:27:05,930 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:27:05,931 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:27:05,931 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:27:05,931 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:27:05,932 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:27:05,932 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:27:05,933 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:27:05,933 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:27:05,933 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:27:05,934 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:27:05,934 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:27:05,934 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:27:05,935 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:27:05,935 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:27:05,935 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:27:05,936 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:27:05,936 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:27:05,936 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:27:05,937 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:27:05,937 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:27:05,937 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:27:05,937 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:27:05,938 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:27:05,938 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:27:05,938 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:27:05,939 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:27:05,939 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:27:05,939 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:27:05,939 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:27:05,940 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:27:05,940 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:27:05,940 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:27:05,941 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:27:05,941 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:27:05,941 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:27:05,942 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:27:05,942 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:27:06,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:27:06,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:27:06,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:27:06,180 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:27:06,181 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:27:06,182 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/parallel-lamport.wvr.yml/witness.yml [2024-06-21 20:27:06,265 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:27:06,266 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:27:06,268 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2024-06-21 20:27:07,814 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:27:08,008 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:27:08,009 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2024-06-21 20:27:08,019 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86fda8c70/73292d2191774d63ab8c28cfae729825/FLAGc39d80425 [2024-06-21 20:27:08,040 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86fda8c70/73292d2191774d63ab8c28cfae729825 [2024-06-21 20:27:08,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:27:08,042 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:27:08,045 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:27:08,045 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:27:08,050 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:27:08,050 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:27:06" (1/2) ... [2024-06-21 20:27:08,051 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3955d208 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:27:08, skipping insertion in model container [2024-06-21 20:27:08,052 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:27:06" (1/2) ... [2024-06-21 20:27:08,053 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6a773b66 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:27:08, skipping insertion in model container [2024-06-21 20:27:08,053 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:27:08" (2/2) ... [2024-06-21 20:27:08,055 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3955d208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:27:08, skipping insertion in model container [2024-06-21 20:27:08,055 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:27:08" (2/2) ... [2024-06-21 20:27:08,055 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:27:08,083 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:27:08,084 INFO L97 edCorrectnessWitness]: Location invariant before [L156-L156] ((! multithreaded || -2147483647 <= n1) && (! multithreaded || -2147483647 <= n2)) && (! multithreaded || (-2147483647 <= n1 && -2147483647 <= n2)) [2024-06-21 20:27:08,085 INFO L97 edCorrectnessWitness]: Location invariant before [L154-L154] ((! multithreaded || -2147483647 <= n1) && (! multithreaded || -2147483647 <= n2)) && (! multithreaded || (-2147483647 <= n1 && -2147483647 <= n2)) [2024-06-21 20:27:08,085 INFO L97 edCorrectnessWitness]: Location invariant before [L155-L155] ((! multithreaded || -2147483647 <= n1) && (! multithreaded || -2147483647 <= n2)) && (! multithreaded || (-2147483647 <= n1 && -2147483647 <= n2)) [2024-06-21 20:27:08,085 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:27:08,085 INFO L106 edCorrectnessWitness]: ghost_update [L153-L153] multithreaded = 1; [2024-06-21 20:27:08,110 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:27:08,326 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:27:08,333 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:27:08,393 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:27:08,408 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:27:08,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:27:08 WrapperNode [2024-06-21 20:27:08,408 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:27:08,409 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:27:08,410 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:27:08,410 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:27:08,416 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:27:08" (1/1) ... [2024-06-21 20:27:08,428 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:27:08" (1/1) ... [2024-06-21 20:27:08,457 INFO L138 Inliner]: procedures = 24, calls = 75, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 236 [2024-06-21 20:27:08,457 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:27:08,458 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:27:08,458 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:27:08,458 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:27:08,467 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:27:08" (1/1) ... [2024-06-21 20:27:08,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:27:08" (1/1) ... [2024-06-21 20:27:08,471 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:27:08" (1/1) ... [2024-06-21 20:27:08,486 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-21 20:27:08,486 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:27:08" (1/1) ... [2024-06-21 20:27:08,486 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:27:08" (1/1) ... [2024-06-21 20:27:08,493 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:27:08" (1/1) ... [2024-06-21 20:27:08,496 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:27:08" (1/1) ... [2024-06-21 20:27:08,497 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:27:08" (1/1) ... [2024-06-21 20:27:08,499 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:27:08" (1/1) ... [2024-06-21 20:27:08,502 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:27:08,502 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:27:08,503 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:27:08,503 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:27:08,504 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:27:08" (1/1) ... [2024-06-21 20:27:08,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:27:08,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:27:08,530 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) [2024-06-21 20:27:08,547 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 [2024-06-21 20:27:08,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:27:08,573 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-21 20:27:08,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-21 20:27:08,573 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-21 20:27:08,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-21 20:27:08,573 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-21 20:27:08,574 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-21 20:27:08,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:27:08,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 20:27:08,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 20:27:08,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 20:27:08,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:27:08,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:27:08,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-21 20:27:08,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:27:08,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:27:08,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 20:27:08,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 20:27:08,580 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:27:08,736 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:27:08,738 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:27:09,022 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:27:09,023 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:27:09,336 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:27:09,336 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-06-21 20:27:09,337 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:27:09 BoogieIcfgContainer [2024-06-21 20:27:09,337 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:27:09,339 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:27:09,340 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:27:09,342 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:27:09,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:27:06" (1/4) ... [2024-06-21 20:27:09,344 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf8217d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:27:09, skipping insertion in model container [2024-06-21 20:27:09,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:27:08" (2/4) ... [2024-06-21 20:27:09,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf8217d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:27:09, skipping insertion in model container [2024-06-21 20:27:09,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:27:08" (3/4) ... [2024-06-21 20:27:09,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf8217d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:27:09, skipping insertion in model container [2024-06-21 20:27:09,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:27:09" (4/4) ... [2024-06-21 20:27:09,347 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2024-06-21 20:27:09,362 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:27:09,363 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:27:09,363 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:27:09,415 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-21 20:27:09,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 52 transitions, 125 flow [2024-06-21 20:27:09,494 INFO L124 PetriNetUnfolderBase]: 1/49 cut-off events. [2024-06-21 20:27:09,494 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-21 20:27:09,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 1/49 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 85 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2024-06-21 20:27:09,497 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 52 transitions, 125 flow [2024-06-21 20:27:09,501 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 44 transitions, 97 flow [2024-06-21 20:27:09,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:27:09,528 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;@75837f9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:27:09,528 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:27:09,534 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:27:09,535 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-06-21 20:27:09,535 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:27:09,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:09,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-21 20:27:09,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:09,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:09,540 INFO L85 PathProgramCache]: Analyzing trace with hash -535080293, now seen corresponding path program 1 times [2024-06-21 20:27:09,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:09,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187725060] [2024-06-21 20:27:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:09,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:27:09,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:09,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187725060] [2024-06-21 20:27:09,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187725060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:09,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:09,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:27:09,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624043588] [2024-06-21 20:27:09,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:09,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:27:09,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:09,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:27:09,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:27:09,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-21 20:27:09,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2024-06-21 20:27:09,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:09,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-21 20:27:09,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:10,402 INFO L124 PetriNetUnfolderBase]: 1948/3284 cut-off events. [2024-06-21 20:27:10,403 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-06-21 20:27:10,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6305 conditions, 3284 events. 1948/3284 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 19800 event pairs, 855 based on Foata normal form. 5/3215 useless extension candidates. Maximal degree in co-relation 6289. Up to 2880 conditions per place. [2024-06-21 20:27:10,430 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 40 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2024-06-21 20:27:10,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 57 transitions, 215 flow [2024-06-21 20:27:10,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:27:10,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:27:10,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-21 20:27:10,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 20:27:10,443 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 97 flow. Second operand 3 states and 100 transitions. [2024-06-21 20:27:10,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 57 transitions, 215 flow [2024-06-21 20:27:10,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 57 transitions, 210 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:27:10,452 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 117 flow [2024-06-21 20:27:10,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-21 20:27:10,458 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2024-06-21 20:27:10,459 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 117 flow [2024-06-21 20:27:10,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2024-06-21 20:27:10,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:10,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:10,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:27:10,461 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:10,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:10,462 INFO L85 PathProgramCache]: Analyzing trace with hash -373558503, now seen corresponding path program 1 times [2024-06-21 20:27:10,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:10,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603362607] [2024-06-21 20:27:10,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:10,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:27:10,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:10,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603362607] [2024-06-21 20:27:10,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603362607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:10,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:10,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:27:10,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412935597] [2024-06-21 20:27:10,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:10,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:27:10,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:10,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:27:10,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:27:10,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 52 [2024-06-21 20:27:10,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2024-06-21 20:27:10,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:10,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 52 [2024-06-21 20:27:10,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:10,878 INFO L124 PetriNetUnfolderBase]: 1207/2190 cut-off events. [2024-06-21 20:27:10,879 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:27:10,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4214 conditions, 2190 events. 1207/2190 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13592 event pairs, 1199 based on Foata normal form. 0/2083 useless extension candidates. Maximal degree in co-relation 4196. Up to 1878 conditions per place. [2024-06-21 20:27:10,892 INFO L140 encePairwiseOnDemand]: 49/52 looper letters, 24 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-06-21 20:27:10,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 47 transitions, 171 flow [2024-06-21 20:27:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:27:10,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:27:10,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-21 20:27:10,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 20:27:10,894 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 117 flow. Second operand 3 states and 96 transitions. [2024-06-21 20:27:10,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 47 transitions, 171 flow [2024-06-21 20:27:10,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 47 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:27:10,896 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 126 flow [2024-06-21 20:27:10,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-21 20:27:10,897 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2024-06-21 20:27:10,897 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 126 flow [2024-06-21 20:27:10,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2024-06-21 20:27:10,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:10,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:10,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:27:10,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:10,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:10,899 INFO L85 PathProgramCache]: Analyzing trace with hash 560127805, now seen corresponding path program 1 times [2024-06-21 20:27:10,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:10,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552545573] [2024-06-21 20:27:10,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:10,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-21 20:27:11,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:11,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552545573] [2024-06-21 20:27:11,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552545573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:11,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:11,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:27:11,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034716391] [2024-06-21 20:27:11,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:11,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:27:11,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:11,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:27:11,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:27:11,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 20:27:11,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 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) [2024-06-21 20:27:11,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:11,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 20:27:11,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:11,641 INFO L124 PetriNetUnfolderBase]: 3302/5277 cut-off events. [2024-06-21 20:27:11,642 INFO L125 PetriNetUnfolderBase]: For 637/637 co-relation queries the response was YES. [2024-06-21 20:27:11,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11192 conditions, 5277 events. 3302/5277 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 31306 event pairs, 751 based on Foata normal form. 95/5357 useless extension candidates. Maximal degree in co-relation 11179. Up to 2744 conditions per place. [2024-06-21 20:27:11,671 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 79 selfloop transitions, 10 changer transitions 0/100 dead transitions. [2024-06-21 20:27:11,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 100 transitions, 436 flow [2024-06-21 20:27:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:27:11,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:27:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-06-21 20:27:11,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-21 20:27:11,677 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 126 flow. Second operand 5 states and 164 transitions. [2024-06-21 20:27:11,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 100 transitions, 436 flow [2024-06-21 20:27:11,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 100 transitions, 432 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 20:27:11,681 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 184 flow [2024-06-21 20:27:11,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2024-06-21 20:27:11,683 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2024-06-21 20:27:11,683 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 184 flow [2024-06-21 20:27:11,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 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) [2024-06-21 20:27:11,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:11,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:11,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:27:11,684 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:11,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:11,685 INFO L85 PathProgramCache]: Analyzing trace with hash -114760032, now seen corresponding path program 1 times [2024-06-21 20:27:11,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:11,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357786846] [2024-06-21 20:27:11,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:11,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-21 20:27:11,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:11,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357786846] [2024-06-21 20:27:11,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357786846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:11,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:11,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:27:11,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925431692] [2024-06-21 20:27:11,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:11,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:27:11,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:11,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:27:11,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:27:11,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 20:27:11,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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) [2024-06-21 20:27:11,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:11,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 20:27:11,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:12,440 INFO L124 PetriNetUnfolderBase]: 3715/6087 cut-off events. [2024-06-21 20:27:12,441 INFO L125 PetriNetUnfolderBase]: For 2581/2677 co-relation queries the response was YES. [2024-06-21 20:27:12,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14227 conditions, 6087 events. 3715/6087 cut-off events. For 2581/2677 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 37541 event pairs, 1251 based on Foata normal form. 120/6163 useless extension candidates. Maximal degree in co-relation 14206. Up to 3051 conditions per place. [2024-06-21 20:27:12,477 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 76 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2024-06-21 20:27:12,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 101 transitions, 505 flow [2024-06-21 20:27:12,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:27:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:27:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-21 20:27:12,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 20:27:12,480 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 184 flow. Second operand 5 states and 160 transitions. [2024-06-21 20:27:12,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 101 transitions, 505 flow [2024-06-21 20:27:12,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 101 transitions, 494 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 20:27:12,489 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 256 flow [2024-06-21 20:27:12,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2024-06-21 20:27:12,491 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 14 predicate places. [2024-06-21 20:27:12,492 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 256 flow [2024-06-21 20:27:12,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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) [2024-06-21 20:27:12,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:12,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:12,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:27:12,493 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:12,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:12,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1410802040, now seen corresponding path program 1 times [2024-06-21 20:27:12,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:12,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625614312] [2024-06-21 20:27:12,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:12,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-21 20:27:12,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:12,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625614312] [2024-06-21 20:27:12,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625614312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:12,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:12,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:27:12,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67265444] [2024-06-21 20:27:12,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:12,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:27:12,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:12,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:27:12,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:27:12,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:27:12,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 256 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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) [2024-06-21 20:27:12,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:12,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:27:12,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:13,919 INFO L124 PetriNetUnfolderBase]: 7076/11378 cut-off events. [2024-06-21 20:27:13,919 INFO L125 PetriNetUnfolderBase]: For 9895/9895 co-relation queries the response was YES. [2024-06-21 20:27:13,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28380 conditions, 11378 events. 7076/11378 cut-off events. For 9895/9895 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 76297 event pairs, 1643 based on Foata normal form. 270/11629 useless extension candidates. Maximal degree in co-relation 28355. Up to 2420 conditions per place. [2024-06-21 20:27:13,987 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 143 selfloop transitions, 26 changer transitions 0/179 dead transitions. [2024-06-21 20:27:13,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 179 transitions, 974 flow [2024-06-21 20:27:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:27:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:27:13,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 291 transitions. [2024-06-21 20:27:13,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-06-21 20:27:13,990 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 256 flow. Second operand 9 states and 291 transitions. [2024-06-21 20:27:13,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 179 transitions, 974 flow [2024-06-21 20:27:13,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 179 transitions, 950 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 20:27:14,001 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 435 flow [2024-06-21 20:27:14,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=435, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2024-06-21 20:27:14,002 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 26 predicate places. [2024-06-21 20:27:14,002 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 435 flow [2024-06-21 20:27:14,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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) [2024-06-21 20:27:14,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:14,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:14,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:27:14,003 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:14,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:14,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1088451206, now seen corresponding path program 2 times [2024-06-21 20:27:14,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:14,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120694026] [2024-06-21 20:27:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:14,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-21 20:27:14,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:14,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120694026] [2024-06-21 20:27:14,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120694026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:14,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:14,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:27:14,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288897596] [2024-06-21 20:27:14,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:14,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:27:14,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:14,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:27:14,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:27:14,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:27:14,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 435 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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) [2024-06-21 20:27:14,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:14,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:27:14,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:15,940 INFO L124 PetriNetUnfolderBase]: 10240/16332 cut-off events. [2024-06-21 20:27:15,940 INFO L125 PetriNetUnfolderBase]: For 34701/34704 co-relation queries the response was YES. [2024-06-21 20:27:15,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45871 conditions, 16332 events. 10240/16332 cut-off events. For 34701/34704 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 115595 event pairs, 3223 based on Foata normal form. 200/16499 useless extension candidates. Maximal degree in co-relation 45840. Up to 10404 conditions per place. [2024-06-21 20:27:16,049 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 150 selfloop transitions, 21 changer transitions 1/182 dead transitions. [2024-06-21 20:27:16,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 182 transitions, 1223 flow [2024-06-21 20:27:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:27:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:27:16,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 277 transitions. [2024-06-21 20:27:16,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918803418803419 [2024-06-21 20:27:16,051 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 435 flow. Second operand 9 states and 277 transitions. [2024-06-21 20:27:16,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 182 transitions, 1223 flow [2024-06-21 20:27:16,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 182 transitions, 1200 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 20:27:16,159 INFO L231 Difference]: Finished difference. Result has 92 places, 85 transitions, 678 flow [2024-06-21 20:27:16,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=678, PETRI_PLACES=92, PETRI_TRANSITIONS=85} [2024-06-21 20:27:16,160 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 39 predicate places. [2024-06-21 20:27:16,160 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 85 transitions, 678 flow [2024-06-21 20:27:16,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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) [2024-06-21 20:27:16,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:16,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:16,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:27:16,161 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:16,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:16,162 INFO L85 PathProgramCache]: Analyzing trace with hash -434812630, now seen corresponding path program 3 times [2024-06-21 20:27:16,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:16,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693565578] [2024-06-21 20:27:16,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:16,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-21 20:27:16,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:16,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693565578] [2024-06-21 20:27:16,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693565578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:16,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:16,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:27:16,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849723660] [2024-06-21 20:27:16,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:16,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:27:16,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:16,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:27:16,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:27:16,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:27:16,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 85 transitions, 678 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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) [2024-06-21 20:27:16,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:16,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:27:16,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:18,089 INFO L124 PetriNetUnfolderBase]: 11327/18151 cut-off events. [2024-06-21 20:27:18,090 INFO L125 PetriNetUnfolderBase]: For 69687/69687 co-relation queries the response was YES. [2024-06-21 20:27:18,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53763 conditions, 18151 events. 11327/18151 cut-off events. For 69687/69687 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 131472 event pairs, 3686 based on Foata normal form. 258/18377 useless extension candidates. Maximal degree in co-relation 53725. Up to 12232 conditions per place. [2024-06-21 20:27:18,310 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 174 selfloop transitions, 20 changer transitions 6/210 dead transitions. [2024-06-21 20:27:18,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 210 transitions, 1496 flow [2024-06-21 20:27:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:27:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:27:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 332 transitions. [2024-06-21 20:27:18,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804195804195804 [2024-06-21 20:27:18,312 INFO L175 Difference]: Start difference. First operand has 92 places, 85 transitions, 678 flow. Second operand 11 states and 332 transitions. [2024-06-21 20:27:18,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 210 transitions, 1496 flow [2024-06-21 20:27:18,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 210 transitions, 1475 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 20:27:18,566 INFO L231 Difference]: Finished difference. Result has 107 places, 88 transitions, 775 flow [2024-06-21 20:27:18,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=775, PETRI_PLACES=107, PETRI_TRANSITIONS=88} [2024-06-21 20:27:18,567 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 54 predicate places. [2024-06-21 20:27:18,567 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 88 transitions, 775 flow [2024-06-21 20:27:18,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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) [2024-06-21 20:27:18,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:18,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:18,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:27:18,568 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:18,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:18,569 INFO L85 PathProgramCache]: Analyzing trace with hash -548751584, now seen corresponding path program 4 times [2024-06-21 20:27:18,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:18,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128157143] [2024-06-21 20:27:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:18,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-21 20:27:18,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:18,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128157143] [2024-06-21 20:27:18,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128157143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:18,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:18,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:27:18,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613316580] [2024-06-21 20:27:18,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:18,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:27:18,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:18,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:27:18,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:27:18,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:27:18,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 88 transitions, 775 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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) [2024-06-21 20:27:18,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:18,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:27:18,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:20,539 INFO L124 PetriNetUnfolderBase]: 10590/17038 cut-off events. [2024-06-21 20:27:20,540 INFO L125 PetriNetUnfolderBase]: For 98456/98456 co-relation queries the response was YES. [2024-06-21 20:27:20,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53388 conditions, 17038 events. 10590/17038 cut-off events. For 98456/98456 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 122839 event pairs, 3533 based on Foata normal form. 150/17156 useless extension candidates. Maximal degree in co-relation 53343. Up to 12206 conditions per place. [2024-06-21 20:27:20,633 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 151 selfloop transitions, 17 changer transitions 3/181 dead transitions. [2024-06-21 20:27:20,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 181 transitions, 1373 flow [2024-06-21 20:27:20,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:27:20,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:27:20,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 271 transitions. [2024-06-21 20:27:20,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5790598290598291 [2024-06-21 20:27:20,638 INFO L175 Difference]: Start difference. First operand has 107 places, 88 transitions, 775 flow. Second operand 9 states and 271 transitions. [2024-06-21 20:27:20,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 181 transitions, 1373 flow [2024-06-21 20:27:20,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 181 transitions, 1299 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:27:20,912 INFO L231 Difference]: Finished difference. Result has 112 places, 86 transitions, 723 flow [2024-06-21 20:27:20,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=723, PETRI_PLACES=112, PETRI_TRANSITIONS=86} [2024-06-21 20:27:20,913 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 59 predicate places. [2024-06-21 20:27:20,913 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 86 transitions, 723 flow [2024-06-21 20:27:20,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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) [2024-06-21 20:27:20,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:20,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:20,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:27:20,914 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:20,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:20,914 INFO L85 PathProgramCache]: Analyzing trace with hash 882391872, now seen corresponding path program 5 times [2024-06-21 20:27:20,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:20,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588321210] [2024-06-21 20:27:20,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:20,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-21 20:27:21,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:21,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588321210] [2024-06-21 20:27:21,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588321210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:21,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:21,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:27:21,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865397112] [2024-06-21 20:27:21,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:21,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:27:21,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:21,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:27:21,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:27:21,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:27:21,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 86 transitions, 723 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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) [2024-06-21 20:27:21,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:21,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:27:21,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:22,514 INFO L124 PetriNetUnfolderBase]: 9750/15784 cut-off events. [2024-06-21 20:27:22,515 INFO L125 PetriNetUnfolderBase]: For 81588/81597 co-relation queries the response was YES. [2024-06-21 20:27:22,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47438 conditions, 15784 events. 9750/15784 cut-off events. For 81588/81597 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 113609 event pairs, 3083 based on Foata normal form. 156/15894 useless extension candidates. Maximal degree in co-relation 47393. Up to 10760 conditions per place. [2024-06-21 20:27:22,615 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 167 selfloop transitions, 18 changer transitions 4/199 dead transitions. [2024-06-21 20:27:22,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 199 transitions, 1451 flow [2024-06-21 20:27:22,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:27:22,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:27:22,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 319 transitions. [2024-06-21 20:27:22,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-21 20:27:22,617 INFO L175 Difference]: Start difference. First operand has 112 places, 86 transitions, 723 flow. Second operand 11 states and 319 transitions. [2024-06-21 20:27:22,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 199 transitions, 1451 flow [2024-06-21 20:27:23,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 199 transitions, 1399 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 20:27:23,023 INFO L231 Difference]: Finished difference. Result has 115 places, 84 transitions, 701 flow [2024-06-21 20:27:23,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=701, PETRI_PLACES=115, PETRI_TRANSITIONS=84} [2024-06-21 20:27:23,024 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 62 predicate places. [2024-06-21 20:27:23,024 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 84 transitions, 701 flow [2024-06-21 20:27:23,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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) [2024-06-21 20:27:23,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:23,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:23,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:27:23,025 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:23,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:23,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2016544372, now seen corresponding path program 6 times [2024-06-21 20:27:23,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:23,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057151607] [2024-06-21 20:27:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:23,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-21 20:27:23,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:23,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057151607] [2024-06-21 20:27:23,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057151607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:23,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:23,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:27:23,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498982207] [2024-06-21 20:27:23,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:23,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:27:23,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:23,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:27:23,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:27:23,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:27:23,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 84 transitions, 701 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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) [2024-06-21 20:27:23,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:23,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:27:23,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:24,571 INFO L124 PetriNetUnfolderBase]: 8736/14455 cut-off events. [2024-06-21 20:27:24,572 INFO L125 PetriNetUnfolderBase]: For 69002/69011 co-relation queries the response was YES. [2024-06-21 20:27:24,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40544 conditions, 14455 events. 8736/14455 cut-off events. For 69002/69011 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 104784 event pairs, 1412 based on Foata normal form. 276/14717 useless extension candidates. Maximal degree in co-relation 40498. Up to 3940 conditions per place. [2024-06-21 20:27:24,633 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 137 selfloop transitions, 41 changer transitions 0/188 dead transitions. [2024-06-21 20:27:24,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 188 transitions, 1407 flow [2024-06-21 20:27:24,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:27:24,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:27:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 284 transitions. [2024-06-21 20:27:24,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068376068376068 [2024-06-21 20:27:24,635 INFO L175 Difference]: Start difference. First operand has 115 places, 84 transitions, 701 flow. Second operand 9 states and 284 transitions. [2024-06-21 20:27:24,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 188 transitions, 1407 flow [2024-06-21 20:27:24,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 188 transitions, 1355 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 20:27:24,756 INFO L231 Difference]: Finished difference. Result has 116 places, 87 transitions, 793 flow [2024-06-21 20:27:24,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=793, PETRI_PLACES=116, PETRI_TRANSITIONS=87} [2024-06-21 20:27:24,757 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 63 predicate places. [2024-06-21 20:27:24,757 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 87 transitions, 793 flow [2024-06-21 20:27:24,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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) [2024-06-21 20:27:24,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:24,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:24,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:27:24,758 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:24,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:24,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1920802461, now seen corresponding path program 1 times [2024-06-21 20:27:24,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:24,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561693573] [2024-06-21 20:27:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:24,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-21 20:27:24,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:24,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561693573] [2024-06-21 20:27:24,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561693573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:24,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:24,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:27:24,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177815759] [2024-06-21 20:27:24,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:24,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:27:24,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:24,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:27:24,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:27:24,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 20:27:24,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 87 transitions, 793 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2024-06-21 20:27:24,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:24,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 20:27:24,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:25,899 INFO L124 PetriNetUnfolderBase]: 8246/13680 cut-off events. [2024-06-21 20:27:25,899 INFO L125 PetriNetUnfolderBase]: For 66267/66519 co-relation queries the response was YES. [2024-06-21 20:27:25,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38678 conditions, 13680 events. 8246/13680 cut-off events. For 66267/66519 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 99853 event pairs, 2075 based on Foata normal form. 143/13710 useless extension candidates. Maximal degree in co-relation 38630. Up to 8178 conditions per place. [2024-06-21 20:27:25,982 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 63 selfloop transitions, 22 changer transitions 11/114 dead transitions. [2024-06-21 20:27:25,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 114 transitions, 1105 flow [2024-06-21 20:27:25,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:27:25,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:27:25,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-06-21 20:27:25,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:27:25,983 INFO L175 Difference]: Start difference. First operand has 116 places, 87 transitions, 793 flow. Second operand 4 states and 130 transitions. [2024-06-21 20:27:25,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 114 transitions, 1105 flow [2024-06-21 20:27:26,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 114 transitions, 1018 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 20:27:26,264 INFO L231 Difference]: Finished difference. Result has 114 places, 75 transitions, 629 flow [2024-06-21 20:27:26,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=629, PETRI_PLACES=114, PETRI_TRANSITIONS=75} [2024-06-21 20:27:26,266 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 61 predicate places. [2024-06-21 20:27:26,266 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 75 transitions, 629 flow [2024-06-21 20:27:26,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2024-06-21 20:27:26,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:26,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:26,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:27:26,268 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:26,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:26,268 INFO L85 PathProgramCache]: Analyzing trace with hash 513333706, now seen corresponding path program 1 times [2024-06-21 20:27:26,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:26,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502965518] [2024-06-21 20:27:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:26,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-21 20:27:26,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:26,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502965518] [2024-06-21 20:27:26,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502965518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:26,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:26,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:27:26,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691772129] [2024-06-21 20:27:26,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:26,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:27:26,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:26,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:27:26,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:27:26,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 20:27:26,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 75 transitions, 629 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-06-21 20:27:26,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:26,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 20:27:26,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:27,151 INFO L124 PetriNetUnfolderBase]: 5627/9396 cut-off events. [2024-06-21 20:27:27,151 INFO L125 PetriNetUnfolderBase]: For 48517/48641 co-relation queries the response was YES. [2024-06-21 20:27:27,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25427 conditions, 9396 events. 5627/9396 cut-off events. For 48517/48641 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 65531 event pairs, 1445 based on Foata normal form. 142/9468 useless extension candidates. Maximal degree in co-relation 25379. Up to 5214 conditions per place. [2024-06-21 20:27:27,185 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 58 selfloop transitions, 10 changer transitions 22/106 dead transitions. [2024-06-21 20:27:27,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 106 transitions, 943 flow [2024-06-21 20:27:27,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:27:27,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:27:27,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-21 20:27:27,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-21 20:27:27,191 INFO L175 Difference]: Start difference. First operand has 114 places, 75 transitions, 629 flow. Second operand 4 states and 132 transitions. [2024-06-21 20:27:27,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 106 transitions, 943 flow [2024-06-21 20:27:27,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 106 transitions, 822 flow, removed 25 selfloop flow, removed 11 redundant places. [2024-06-21 20:27:27,249 INFO L231 Difference]: Finished difference. Result has 101 places, 56 transitions, 351 flow [2024-06-21 20:27:27,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=351, PETRI_PLACES=101, PETRI_TRANSITIONS=56} [2024-06-21 20:27:27,253 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 48 predicate places. [2024-06-21 20:27:27,253 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 56 transitions, 351 flow [2024-06-21 20:27:27,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-06-21 20:27:27,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:27,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:27,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:27:27,254 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:27,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:27,254 INFO L85 PathProgramCache]: Analyzing trace with hash -563215096, now seen corresponding path program 1 times [2024-06-21 20:27:27,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:27,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695409346] [2024-06-21 20:27:27,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:27,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-21 20:27:27,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:27,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695409346] [2024-06-21 20:27:27,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695409346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:27,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:27,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:27:27,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100671966] [2024-06-21 20:27:27,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:27,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:27:27,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:27,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:27:27,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:27:27,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 52 [2024-06-21 20:27:27,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 56 transitions, 351 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2024-06-21 20:27:27,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:27,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 52 [2024-06-21 20:27:27,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:27,628 INFO L124 PetriNetUnfolderBase]: 1937/3583 cut-off events. [2024-06-21 20:27:27,628 INFO L125 PetriNetUnfolderBase]: For 5704/5763 co-relation queries the response was YES. [2024-06-21 20:27:27,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8920 conditions, 3583 events. 1937/3583 cut-off events. For 5704/5763 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 23927 event pairs, 1675 based on Foata normal form. 30/3514 useless extension candidates. Maximal degree in co-relation 8878. Up to 2713 conditions per place. [2024-06-21 20:27:27,653 INFO L140 encePairwiseOnDemand]: 49/52 looper letters, 38 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-06-21 20:27:27,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 68 transitions, 457 flow [2024-06-21 20:27:27,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:27:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:27:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-21 20:27:27,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-06-21 20:27:27,655 INFO L175 Difference]: Start difference. First operand has 101 places, 56 transitions, 351 flow. Second operand 3 states and 103 transitions. [2024-06-21 20:27:27,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 68 transitions, 457 flow [2024-06-21 20:27:27,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 68 transitions, 366 flow, removed 13 selfloop flow, removed 17 redundant places. [2024-06-21 20:27:27,676 INFO L231 Difference]: Finished difference. Result has 81 places, 56 transitions, 268 flow [2024-06-21 20:27:27,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=81, PETRI_TRANSITIONS=56} [2024-06-21 20:27:27,677 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 28 predicate places. [2024-06-21 20:27:27,678 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 56 transitions, 268 flow [2024-06-21 20:27:27,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2024-06-21 20:27:27,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:27,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:27,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:27:27,678 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:27,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:27,679 INFO L85 PathProgramCache]: Analyzing trace with hash 280798948, now seen corresponding path program 2 times [2024-06-21 20:27:27,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:27,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222242169] [2024-06-21 20:27:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:27,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-21 20:27:27,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:27,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222242169] [2024-06-21 20:27:27,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222242169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:27,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:27,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:27:27,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054141829] [2024-06-21 20:27:27,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:27,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:27:27,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:27,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:27:27,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:27:27,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:27:27,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 56 transitions, 268 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 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) [2024-06-21 20:27:27,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:27,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:27:27,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:28,449 INFO L124 PetriNetUnfolderBase]: 3159/5264 cut-off events. [2024-06-21 20:27:28,449 INFO L125 PetriNetUnfolderBase]: For 6593/6593 co-relation queries the response was YES. [2024-06-21 20:27:28,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13082 conditions, 5264 events. 3159/5264 cut-off events. For 6593/6593 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 31951 event pairs, 785 based on Foata normal form. 60/5292 useless extension candidates. Maximal degree in co-relation 13053. Up to 1328 conditions per place. [2024-06-21 20:27:28,463 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 106 selfloop transitions, 10 changer transitions 34/160 dead transitions. [2024-06-21 20:27:28,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 160 transitions, 835 flow [2024-06-21 20:27:28,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:27:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:27:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 289 transitions. [2024-06-21 20:27:28,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5557692307692308 [2024-06-21 20:27:28,465 INFO L175 Difference]: Start difference. First operand has 81 places, 56 transitions, 268 flow. Second operand 10 states and 289 transitions. [2024-06-21 20:27:28,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 160 transitions, 835 flow [2024-06-21 20:27:28,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 160 transitions, 831 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 20:27:28,474 INFO L231 Difference]: Finished difference. Result has 89 places, 52 transitions, 257 flow [2024-06-21 20:27:28,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=257, PETRI_PLACES=89, PETRI_TRANSITIONS=52} [2024-06-21 20:27:28,475 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 36 predicate places. [2024-06-21 20:27:28,475 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 52 transitions, 257 flow [2024-06-21 20:27:28,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 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) [2024-06-21 20:27:28,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:28,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:28,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:27:28,476 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:28,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:28,476 INFO L85 PathProgramCache]: Analyzing trace with hash 311441914, now seen corresponding path program 3 times [2024-06-21 20:27:28,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:28,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733165263] [2024-06-21 20:27:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:28,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-21 20:27:28,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:28,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733165263] [2024-06-21 20:27:28,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733165263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:28,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:28,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:27:28,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282394611] [2024-06-21 20:27:28,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:28,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:27:28,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:28,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:27:28,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:27:28,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:27:28,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 52 transitions, 257 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 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) [2024-06-21 20:27:28,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:28,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:27:28,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:29,065 INFO L124 PetriNetUnfolderBase]: 2031/3439 cut-off events. [2024-06-21 20:27:29,065 INFO L125 PetriNetUnfolderBase]: For 6016/6016 co-relation queries the response was YES. [2024-06-21 20:27:29,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8735 conditions, 3439 events. 2031/3439 cut-off events. For 6016/6016 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 19301 event pairs, 738 based on Foata normal form. 60/3467 useless extension candidates. Maximal degree in co-relation 8704. Up to 1328 conditions per place. [2024-06-21 20:27:29,077 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 44 selfloop transitions, 4 changer transitions 66/124 dead transitions. [2024-06-21 20:27:29,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 124 transitions, 649 flow [2024-06-21 20:27:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:27:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:27:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-21 20:27:29,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432692307692307 [2024-06-21 20:27:29,078 INFO L175 Difference]: Start difference. First operand has 89 places, 52 transitions, 257 flow. Second operand 8 states and 226 transitions. [2024-06-21 20:27:29,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 124 transitions, 649 flow [2024-06-21 20:27:29,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 124 transitions, 607 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 20:27:29,085 INFO L231 Difference]: Finished difference. Result has 82 places, 46 transitions, 186 flow [2024-06-21 20:27:29,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=74, 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=8, PETRI_FLOW=186, PETRI_PLACES=82, PETRI_TRANSITIONS=46} [2024-06-21 20:27:29,086 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 29 predicate places. [2024-06-21 20:27:29,086 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 46 transitions, 186 flow [2024-06-21 20:27:29,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 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) [2024-06-21 20:27:29,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:29,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:29,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:27:29,087 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:29,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:29,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2035109076, now seen corresponding path program 1 times [2024-06-21 20:27:29,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:29,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323548487] [2024-06-21 20:27:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:29,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-21 20:27:29,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:29,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323548487] [2024-06-21 20:27:29,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323548487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:29,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:29,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:27:29,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102966123] [2024-06-21 20:27:29,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:29,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:27:29,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:29,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:27:29,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:27:29,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:27:29,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 46 transitions, 186 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 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) [2024-06-21 20:27:29,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:29,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:27:29,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:29,548 INFO L124 PetriNetUnfolderBase]: 1676/2801 cut-off events. [2024-06-21 20:27:29,548 INFO L125 PetriNetUnfolderBase]: For 3783/3783 co-relation queries the response was YES. [2024-06-21 20:27:29,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6786 conditions, 2801 events. 1676/2801 cut-off events. For 3783/3783 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 14845 event pairs, 77 based on Foata normal form. 60/2858 useless extension candidates. Maximal degree in co-relation 6758. Up to 985 conditions per place. [2024-06-21 20:27:29,557 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 72 selfloop transitions, 7 changer transitions 32/121 dead transitions. [2024-06-21 20:27:29,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 121 transitions, 580 flow [2024-06-21 20:27:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:27:29,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:27:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-21 20:27:29,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-06-21 20:27:29,559 INFO L175 Difference]: Start difference. First operand has 82 places, 46 transitions, 186 flow. Second operand 10 states and 252 transitions. [2024-06-21 20:27:29,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 121 transitions, 580 flow [2024-06-21 20:27:29,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 121 transitions, 542 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 20:27:29,563 INFO L231 Difference]: Finished difference. Result has 71 places, 44 transitions, 157 flow [2024-06-21 20:27:29,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=157, PETRI_PLACES=71, PETRI_TRANSITIONS=44} [2024-06-21 20:27:29,564 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 18 predicate places. [2024-06-21 20:27:29,564 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 44 transitions, 157 flow [2024-06-21 20:27:29,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 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) [2024-06-21 20:27:29,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:29,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:29,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:27:29,565 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:29,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:29,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1575200994, now seen corresponding path program 2 times [2024-06-21 20:27:29,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:29,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095200433] [2024-06-21 20:27:29,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:29,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-21 20:27:29,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:29,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095200433] [2024-06-21 20:27:29,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095200433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:29,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:29,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:27:29,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10134763] [2024-06-21 20:27:29,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:29,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:27:29,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:29,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:27:29,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:27:29,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:27:29,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 44 transitions, 157 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 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) [2024-06-21 20:27:29,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:29,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:27:29,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:29,996 INFO L124 PetriNetUnfolderBase]: 580/1034 cut-off events. [2024-06-21 20:27:29,997 INFO L125 PetriNetUnfolderBase]: For 1165/1165 co-relation queries the response was YES. [2024-06-21 20:27:29,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2448 conditions, 1034 events. 580/1034 cut-off events. For 1165/1165 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4317 event pairs, 30 based on Foata normal form. 60/1091 useless extension candidates. Maximal degree in co-relation 2438. Up to 355 conditions per place. [2024-06-21 20:27:30,000 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 0 selfloop transitions, 0 changer transitions 87/87 dead transitions. [2024-06-21 20:27:30,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 387 flow [2024-06-21 20:27:30,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:27:30,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:27:30,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 20:27:30,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567307692307692 [2024-06-21 20:27:30,002 INFO L175 Difference]: Start difference. First operand has 71 places, 44 transitions, 157 flow. Second operand 8 states and 190 transitions. [2024-06-21 20:27:30,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 387 flow [2024-06-21 20:27:30,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 361 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 20:27:30,005 INFO L231 Difference]: Finished difference. Result has 62 places, 0 transitions, 0 flow [2024-06-21 20:27:30,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=62, PETRI_TRANSITIONS=0} [2024-06-21 20:27:30,005 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2024-06-21 20:27:30,006 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 0 transitions, 0 flow [2024-06-21 20:27:30,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 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) [2024-06-21 20:27:30,008 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-21 20:27:30,009 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-21 20:27:30,009 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-21 20:27:30,009 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-21 20:27:30,009 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-21 20:27:30,009 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-21 20:27:30,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:27:30,010 INFO L445 BasicCegarLoop]: Path program histogram: [6, 3, 2, 1, 1, 1, 1, 1, 1] [2024-06-21 20:27:30,013 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 20:27:30,013 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 20:27:30,017 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-21 20:27:30,017 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-21 20:27:30,018 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 08:27:30 BasicIcfg [2024-06-21 20:27:30,018 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 20:27:30,018 INFO L158 Benchmark]: Toolchain (without parser) took 21975.94ms. Allocated memory was 127.9MB in the beginning and 10.5GB in the end (delta: 10.4GB). Free memory was 72.4MB in the beginning and 9.5GB in the end (delta: -9.5GB). Peak memory consumption was 931.2MB. Max. memory is 16.1GB. [2024-06-21 20:27:30,019 INFO L158 Benchmark]: Witness Parser took 0.19ms. Allocated memory is still 127.9MB. Free memory is still 92.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 20:27:30,019 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 127.9MB. Free memory is still 89.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 20:27:30,019 INFO L158 Benchmark]: CACSL2BoogieTranslator took 363.73ms. Allocated memory is still 127.9MB. Free memory was 72.0MB in the beginning and 56.3MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-06-21 20:27:30,019 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.17ms. Allocated memory is still 127.9MB. Free memory was 56.3MB in the beginning and 53.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 20:27:30,020 INFO L158 Benchmark]: Boogie Preprocessor took 43.82ms. Allocated memory is still 127.9MB. Free memory was 53.9MB in the beginning and 51.0MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 20:27:30,020 INFO L158 Benchmark]: RCFGBuilder took 834.62ms. Allocated memory was 127.9MB in the beginning and 178.3MB in the end (delta: 50.3MB). Free memory was 51.0MB in the beginning and 95.7MB in the end (delta: -44.7MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2024-06-21 20:27:30,020 INFO L158 Benchmark]: TraceAbstraction took 20678.43ms. Allocated memory was 178.3MB in the beginning and 10.5GB in the end (delta: 10.3GB). Free memory was 95.7MB in the beginning and 9.5GB in the end (delta: -9.4GB). Peak memory consumption was 902.1MB. Max. memory is 16.1GB. [2024-06-21 20:27:30,022 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.19ms. Allocated memory is still 127.9MB. Free memory is still 92.9MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.19ms. Allocated memory is still 127.9MB. Free memory is still 89.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 363.73ms. Allocated memory is still 127.9MB. Free memory was 72.0MB in the beginning and 56.3MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.17ms. Allocated memory is still 127.9MB. Free memory was 56.3MB in the beginning and 53.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.82ms. Allocated memory is still 127.9MB. Free memory was 53.9MB in the beginning and 51.0MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 834.62ms. Allocated memory was 127.9MB in the beginning and 178.3MB in the end (delta: 50.3MB). Free memory was 51.0MB in the beginning and 95.7MB in the end (delta: -44.7MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. * TraceAbstraction took 20678.43ms. Allocated memory was 178.3MB in the beginning and 10.5GB in the end (delta: 10.3GB). Free memory was 95.7MB in the beginning and 9.5GB in the end (delta: -9.4GB). Peak memory consumption was 902.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 154]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 155]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 156]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 87 locations, 6 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: 20.6s, OverallIterations: 17, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 18.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2207 SdHoareTripleChecker+Valid, 2.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2053 mSDsluCounter, 325 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 212 mSDsCounter, 115 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5054 IncrementalHoareTripleChecker+Invalid, 5169 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 115 mSolverCounterUnsat, 113 mSDtfsCounter, 5054 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 143 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=793occurred in iteration=10, InterpolantAutomatonStates: 121, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 313 NumberOfCodeBlocks, 313 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 296 ConstructedInterpolants, 0 QuantifiedInterpolants, 1104 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 15/15 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 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 20:27:30,052 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