./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/45_monabsex1_vs.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/45_monabsex1_vs.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 16:43:20,242 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:43:20,300 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:43:20,303 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:43:20,304 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:43:20,331 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:43:20,349 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:43:20,350 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:43:20,350 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:43:20,353 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:43:20,353 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:43:20,354 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:43:20,354 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:43:20,355 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:43:20,356 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:43:20,356 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:43:20,356 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:43:20,356 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:43:20,356 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:43:20,357 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:43:20,357 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:43:20,357 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:43:20,357 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:43:20,357 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:43:20,358 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:43:20,358 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:43:20,358 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:43:20,358 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:43:20,359 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:43:20,359 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:43:20,360 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:43:20,360 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:43:20,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:43:20,360 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:43:20,360 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:43:20,360 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:43:20,361 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:43:20,361 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:43:20,361 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:43:20,361 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:43:20,361 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:43:20,362 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:43:20,362 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:43:20,362 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:43:20,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:43:20,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:43:20,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:43:20,614 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:43:20,614 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:43:20,615 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2024-01-31 16:43:21,695 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:43:21,952 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:43:21,953 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2024-01-31 16:43:21,970 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9267afa5a/c4fa76dd33a547c2a78659f2c0ea4da0/FLAGd485ef0a9 [2024-01-31 16:43:21,984 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9267afa5a/c4fa76dd33a547c2a78659f2c0ea4da0 [2024-01-31 16:43:21,987 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:43:21,987 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:43:21,989 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/45_monabsex1_vs.yml/witness.yml [2024-01-31 16:43:22,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:43:22,083 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:43:22,083 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:43:22,083 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:43:22,087 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:43:22,088 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:43:21" (1/2) ... [2024-01-31 16:43:22,090 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69e62f43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:22, skipping insertion in model container [2024-01-31 16:43:22,091 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:43:21" (1/2) ... [2024-01-31 16:43:22,092 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6cfe1f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:22, skipping insertion in model container [2024-01-31 16:43:22,092 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:43:22" (2/2) ... [2024-01-31 16:43:22,092 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69e62f43 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:22, skipping insertion in model container [2024-01-31 16:43:22,093 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:43:22" (2/2) ... [2024-01-31 16:43:22,093 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:43:22,135 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:43:22,136 INFO L98 nessWitnessExtractor]: Location invariant after [L704-L704] (unsigned long )arg == 0UL [2024-01-31 16:43:22,136 INFO L98 nessWitnessExtractor]: Location invariant before [L710-L710] (((4 == l) && (l == 4)) && ((unsigned long )arg == 0UL)) && (s != 4) [2024-01-31 16:43:22,172 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:43:22,427 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i[30633,30646] [2024-01-31 16:43:22,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:43:22,439 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:43:22,471 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:43:22,474 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i[30633,30646] Start Parsing Local [2024-01-31 16:43:22,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:43:22,538 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:43:22,538 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:22 WrapperNode [2024-01-31 16:43:22,539 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:43:22,539 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:43:22,539 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:43:22,540 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:43:22,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:22" (1/1) ... [2024-01-31 16:43:22,553 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:22" (1/1) ... [2024-01-31 16:43:22,565 INFO L138 Inliner]: procedures = 170, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2024-01-31 16:43:22,565 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:43:22,566 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:43:22,566 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:43:22,566 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:43:22,573 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:22" (1/1) ... [2024-01-31 16:43:22,573 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:22" (1/1) ... [2024-01-31 16:43:22,575 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:22" (1/1) ... [2024-01-31 16:43:22,584 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 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]. [2024-01-31 16:43:22,584 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:22" (1/1) ... [2024-01-31 16:43:22,584 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:22" (1/1) ... [2024-01-31 16:43:22,587 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:22" (1/1) ... [2024-01-31 16:43:22,591 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:22" (1/1) ... [2024-01-31 16:43:22,592 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:22" (1/1) ... [2024-01-31 16:43:22,592 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:22" (1/1) ... [2024-01-31 16:43:22,594 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:43:22,594 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:43:22,594 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:43:22,595 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:43:22,595 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:22" (1/1) ... [2024-01-31 16:43:22,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:43:22,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:43:22,619 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 16:43:22,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 16:43:22,653 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-31 16:43:22,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-31 16:43:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:43:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:43:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 16:43:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:43:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:43:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:43:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:43:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:43:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 16:43:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:43:22,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:43:22,657 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:43:22,782 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:43:22,784 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:43:22,906 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:43:22,906 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:43:23,001 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:43:23,002 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-01-31 16:43:23,003 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:43:23 BoogieIcfgContainer [2024-01-31 16:43:23,003 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:43:23,005 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:43:23,006 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:43:23,008 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:43:23,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:43:21" (1/4) ... [2024-01-31 16:43:23,009 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507d7e90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:43:23, skipping insertion in model container [2024-01-31 16:43:23,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:43:22" (2/4) ... [2024-01-31 16:43:23,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507d7e90 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:43:23, skipping insertion in model container [2024-01-31 16:43:23,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:22" (3/4) ... [2024-01-31 16:43:23,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507d7e90 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:43:23, skipping insertion in model container [2024-01-31 16:43:23,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:43:23" (4/4) ... [2024-01-31 16:43:23,012 INFO L112 eAbstractionObserver]: Analyzing ICFG 45_monabsex1_vs.i [2024-01-31 16:43:23,026 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:43:23,026 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-01-31 16:43:23,026 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:43:23,056 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:43:23,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 14 places, 11 transitions, 26 flow [2024-01-31 16:43:23,103 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2024-01-31 16:43:23,106 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:43:23,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17 conditions, 13 events. 0/13 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2024-01-31 16:43:23,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 14 places, 11 transitions, 26 flow [2024-01-31 16:43:23,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 14 places, 11 transitions, 26 flow [2024-01-31 16:43:23,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:43:23,127 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;@4550edfb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:43:23,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-31 16:43:23,131 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:43:23,131 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-01-31 16:43:23,131 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:43:23,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:23,132 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-01-31 16:43:23,132 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 16:43:23,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:23,137 INFO L85 PathProgramCache]: Analyzing trace with hash 128871579, now seen corresponding path program 1 times [2024-01-31 16:43:23,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:23,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150950708] [2024-01-31 16:43:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:23,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:43:23,276 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:43:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:43:23,322 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:43:23,324 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:43:23,324 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-01-31 16:43:23,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-01-31 16:43:23,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-01-31 16:43:23,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 5 remaining) [2024-01-31 16:43:23,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-01-31 16:43:23,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:43:23,327 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-31 16:43:23,330 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:43:23,330 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-31 16:43:23,342 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:43:23,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 18 transitions, 46 flow [2024-01-31 16:43:23,348 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2024-01-31 16:43:23,351 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:43:23,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 22 events. 0/22 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 44 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2024-01-31 16:43:23,352 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 18 transitions, 46 flow [2024-01-31 16:43:23,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 46 flow [2024-01-31 16:43:23,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:43:23,354 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;@4550edfb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:43:23,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-01-31 16:43:23,357 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:43:23,364 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-01-31 16:43:23,364 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:43:23,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:23,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:43:23,364 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-31 16:43:23,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:23,365 INFO L85 PathProgramCache]: Analyzing trace with hash 232741404, now seen corresponding path program 1 times [2024-01-31 16:43:23,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:23,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345649718] [2024-01-31 16:43:23,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:23,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:43:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:43:23,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:43:23,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345649718] [2024-01-31 16:43:23,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345649718] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:43:23,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:43:23,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:43:23,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322005529] [2024-01-31 16:43:23,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:43:23,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:43:23,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:43:23,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:43:23,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:43:23,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 18 [2024-01-31 16:43:23,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:23,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:43:23,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 18 [2024-01-31 16:43:23,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:43:23,598 INFO L124 PetriNetUnfolderBase]: 145/279 cut-off events. [2024-01-31 16:43:23,598 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-01-31 16:43:23,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 279 events. 145/279 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1152 event pairs, 68 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 446. Up to 163 conditions per place. [2024-01-31 16:43:23,605 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 23 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-01-31 16:43:23,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 27 transitions, 121 flow [2024-01-31 16:43:23,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:43:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:43:23,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 33 transitions. [2024-01-31 16:43:23,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-01-31 16:43:23,615 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 46 flow. Second operand 3 states and 33 transitions. [2024-01-31 16:43:23,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 27 transitions, 121 flow [2024-01-31 16:43:23,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 121 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:43:23,620 INFO L231 Difference]: Finished difference. Result has 26 places, 19 transitions, 68 flow [2024-01-31 16:43:23,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=26, PETRI_TRANSITIONS=19} [2024-01-31 16:43:23,624 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 3 predicate places. [2024-01-31 16:43:23,625 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 19 transitions, 68 flow [2024-01-31 16:43:23,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:23,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:23,625 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2024-01-31 16:43:23,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:43:23,628 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-31 16:43:23,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:23,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1375212662, now seen corresponding path program 1 times [2024-01-31 16:43:23,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:23,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065358334] [2024-01-31 16:43:23,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:23,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:43:23,670 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:43:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:43:23,692 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:43:23,693 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:43:23,694 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-01-31 16:43:23,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 7 remaining) [2024-01-31 16:43:23,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-01-31 16:43:23,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 7 remaining) [2024-01-31 16:43:23,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-01-31 16:43:23,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 7 remaining) [2024-01-31 16:43:23,697 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-01-31 16:43:23,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:43:23,697 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-31 16:43:23,698 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:43:23,698 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-31 16:43:23,727 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:43:23,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 25 transitions, 68 flow [2024-01-31 16:43:23,735 INFO L124 PetriNetUnfolderBase]: 0/31 cut-off events. [2024-01-31 16:43:23,735 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-31 16:43:23,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 31 events. 0/31 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 79 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2024-01-31 16:43:23,736 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 25 transitions, 68 flow [2024-01-31 16:43:23,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 25 transitions, 68 flow [2024-01-31 16:43:23,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:43:23,738 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;@4550edfb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:43:23,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-01-31 16:43:23,744 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:43:23,744 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2024-01-31 16:43:23,745 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-31 16:43:23,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:23,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:43:23,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 16:43:23,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:23,746 INFO L85 PathProgramCache]: Analyzing trace with hash 972506550, now seen corresponding path program 1 times [2024-01-31 16:43:23,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:23,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120792491] [2024-01-31 16:43:23,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:23,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:43:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:43:23,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:43:23,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120792491] [2024-01-31 16:43:23,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120792491] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:43:23,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:43:23,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:43:23,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710172695] [2024-01-31 16:43:23,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:43:23,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:43:23,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:43:23,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:43:23,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:43:23,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2024-01-31 16:43:23,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:23,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:43:23,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2024-01-31 16:43:23,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:43:24,101 INFO L124 PetriNetUnfolderBase]: 2087/3166 cut-off events. [2024-01-31 16:43:24,101 INFO L125 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2024-01-31 16:43:24,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6587 conditions, 3166 events. 2087/3166 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 16363 event pairs, 1162 based on Foata normal form. 0/2366 useless extension candidates. Maximal degree in co-relation 3736. Up to 2073 conditions per place. [2024-01-31 16:43:24,118 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 36 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-01-31 16:43:24,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 192 flow [2024-01-31 16:43:24,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:43:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:43:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-01-31 16:43:24,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-01-31 16:43:24,120 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 68 flow. Second operand 3 states and 47 transitions. [2024-01-31 16:43:24,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 192 flow [2024-01-31 16:43:24,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 41 transitions, 188 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-01-31 16:43:24,122 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 96 flow [2024-01-31 16:43:24,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2024-01-31 16:43:24,123 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2024-01-31 16:43:24,123 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 96 flow [2024-01-31 16:43:24,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:24,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:24,123 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-01-31 16:43:24,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:43:24,124 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 16:43:24,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1731991259, now seen corresponding path program 1 times [2024-01-31 16:43:24,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:24,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083996411] [2024-01-31 16:43:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:24,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:43:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:43:24,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:43:24,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083996411] [2024-01-31 16:43:24,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083996411] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:43:24,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:43:24,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:43:24,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275364103] [2024-01-31 16:43:24,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:43:24,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:43:24,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:43:24,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:43:24,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:43:24,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2024-01-31 16:43:24,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:24,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:43:24,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2024-01-31 16:43:24,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:43:24,409 INFO L124 PetriNetUnfolderBase]: 2486/3820 cut-off events. [2024-01-31 16:43:24,409 INFO L125 PetriNetUnfolderBase]: For 1329/1329 co-relation queries the response was YES. [2024-01-31 16:43:24,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9044 conditions, 3820 events. 2486/3820 cut-off events. For 1329/1329 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 20799 event pairs, 1251 based on Foata normal form. 0/3070 useless extension candidates. Maximal degree in co-relation 8115. Up to 2390 conditions per place. [2024-01-31 16:43:24,429 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 38 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2024-01-31 16:43:24,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 45 transitions, 245 flow [2024-01-31 16:43:24,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:43:24,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:43:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2024-01-31 16:43:24,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2024-01-31 16:43:24,430 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 96 flow. Second operand 3 states and 44 transitions. [2024-01-31 16:43:24,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 45 transitions, 245 flow [2024-01-31 16:43:24,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 231 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:43:24,436 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 138 flow [2024-01-31 16:43:24,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-01-31 16:43:24,437 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2024-01-31 16:43:24,437 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 138 flow [2024-01-31 16:43:24,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:24,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:24,438 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2024-01-31 16:43:24,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:43:24,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 16:43:24,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:24,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2142406285, now seen corresponding path program 1 times [2024-01-31 16:43:24,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:24,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591534094] [2024-01-31 16:43:24,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:24,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:43:24,449 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:43:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:43:24,455 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:43:24,455 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:43:24,456 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2024-01-31 16:43:24,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 9 remaining) [2024-01-31 16:43:24,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2024-01-31 16:43:24,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 9 remaining) [2024-01-31 16:43:24,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2024-01-31 16:43:24,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 9 remaining) [2024-01-31 16:43:24,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2024-01-31 16:43:24,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 9 remaining) [2024-01-31 16:43:24,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2024-01-31 16:43:24,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:43:24,457 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-01-31 16:43:24,458 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:43:24,458 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-31 16:43:24,478 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:43:24,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 32 transitions, 92 flow [2024-01-31 16:43:24,484 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-01-31 16:43:24,484 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-31 16:43:24,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 40 events. 0/40 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 92 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2024-01-31 16:43:24,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 32 transitions, 92 flow [2024-01-31 16:43:24,485 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 32 transitions, 92 flow [2024-01-31 16:43:24,485 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:43:24,491 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;@4550edfb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:43:24,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-01-31 16:43:24,493 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:43:24,493 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-01-31 16:43:24,494 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:43:24,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:24,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:43:24,494 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:43:24,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:24,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1919361846, now seen corresponding path program 1 times [2024-01-31 16:43:24,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:24,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506388526] [2024-01-31 16:43:24,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:24,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:43:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:43:24,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:43:24,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506388526] [2024-01-31 16:43:24,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506388526] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:43:24,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:43:24,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:43:24,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46308660] [2024-01-31 16:43:24,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:43:24,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:43:24,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:43:24,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:43:24,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:43:24,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 32 [2024-01-31 16:43:24,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:24,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:43:24,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 32 [2024-01-31 16:43:24,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:43:26,152 INFO L124 PetriNetUnfolderBase]: 21991/29909 cut-off events. [2024-01-31 16:43:26,152 INFO L125 PetriNetUnfolderBase]: For 5435/5435 co-relation queries the response was YES. [2024-01-31 16:43:26,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62365 conditions, 29909 events. 21991/29909 cut-off events. For 5435/5435 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 169087 event pairs, 13110 based on Foata normal form. 0/21889 useless extension candidates. Maximal degree in co-relation 8744. Up to 20443 conditions per place. [2024-01-31 16:43:26,392 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 49 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-01-31 16:43:26,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 267 flow [2024-01-31 16:43:26,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:43:26,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:43:26,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-01-31 16:43:26,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-01-31 16:43:26,395 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 92 flow. Second operand 3 states and 61 transitions. [2024-01-31 16:43:26,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 267 flow [2024-01-31 16:43:26,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 255 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-01-31 16:43:26,398 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 124 flow [2024-01-31 16:43:26,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2024-01-31 16:43:26,400 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-01-31 16:43:26,400 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 124 flow [2024-01-31 16:43:26,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:26,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:26,401 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-01-31 16:43:26,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:43:26,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:43:26,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:26,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1952308831, now seen corresponding path program 1 times [2024-01-31 16:43:26,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:26,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285101477] [2024-01-31 16:43:26,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:26,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:43:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:43:26,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:43:26,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285101477] [2024-01-31 16:43:26,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285101477] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:43:26,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:43:26,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:43:26,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507717292] [2024-01-31 16:43:26,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:43:26,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:43:26,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:43:26,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:43:26,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:43:26,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 32 [2024-01-31 16:43:26,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:26,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:43:26,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 32 [2024-01-31 16:43:26,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:43:28,815 INFO L124 PetriNetUnfolderBase]: 29206/39927 cut-off events. [2024-01-31 16:43:28,815 INFO L125 PetriNetUnfolderBase]: For 14432/14432 co-relation queries the response was YES. [2024-01-31 16:43:28,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93939 conditions, 39927 events. 29206/39927 cut-off events. For 14432/14432 co-relation queries the response was YES. Maximal size of possible extension queue 1672. Compared 238266 event pairs, 15679 based on Foata normal form. 0/30861 useless extension candidates. Maximal degree in co-relation 84802. Up to 27082 conditions per place. [2024-01-31 16:43:29,064 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 52 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-01-31 16:43:29,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 332 flow [2024-01-31 16:43:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:43:29,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:43:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-01-31 16:43:29,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-01-31 16:43:29,068 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 124 flow. Second operand 3 states and 58 transitions. [2024-01-31 16:43:29,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 332 flow [2024-01-31 16:43:29,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:43:29,160 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 184 flow [2024-01-31 16:43:29,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-01-31 16:43:29,161 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2024-01-31 16:43:29,161 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 184 flow [2024-01-31 16:43:29,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:29,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:29,162 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:43:29,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:43:29,162 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:43:29,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:29,163 INFO L85 PathProgramCache]: Analyzing trace with hash -751090673, now seen corresponding path program 1 times [2024-01-31 16:43:29,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:29,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783626769] [2024-01-31 16:43:29,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:29,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:43:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:43:29,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:43:29,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783626769] [2024-01-31 16:43:29,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783626769] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:43:29,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:43:29,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:43:29,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194007417] [2024-01-31 16:43:29,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:43:29,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:43:29,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:43:29,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:43:29,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:43:29,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 32 [2024-01-31 16:43:29,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:29,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:43:29,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 32 [2024-01-31 16:43:29,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:43:31,705 INFO L124 PetriNetUnfolderBase]: 36367/50057 cut-off events. [2024-01-31 16:43:31,705 INFO L125 PetriNetUnfolderBase]: For 29312/29312 co-relation queries the response was YES. [2024-01-31 16:43:31,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127179 conditions, 50057 events. 36367/50057 cut-off events. For 29312/29312 co-relation queries the response was YES. Maximal size of possible extension queue 2222. Compared 310597 event pairs, 19512 based on Foata normal form. 0/39701 useless extension candidates. Maximal degree in co-relation 115038. Up to 33101 conditions per place. [2024-01-31 16:43:32,057 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 56 selfloop transitions, 13 changer transitions 0/70 dead transitions. [2024-01-31 16:43:32,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 70 transitions, 445 flow [2024-01-31 16:43:32,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:43:32,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:43:32,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2024-01-31 16:43:32,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-01-31 16:43:32,060 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 184 flow. Second operand 3 states and 57 transitions. [2024-01-31 16:43:32,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 70 transitions, 445 flow [2024-01-31 16:43:32,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 70 transitions, 417 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:43:32,318 INFO L231 Difference]: Finished difference. Result has 48 places, 50 transitions, 292 flow [2024-01-31 16:43:32,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=292, PETRI_PLACES=48, PETRI_TRANSITIONS=50} [2024-01-31 16:43:32,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2024-01-31 16:43:32,318 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 292 flow [2024-01-31 16:43:32,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:32,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:32,319 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:43:32,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:43:32,319 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:43:32,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:32,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1125515884, now seen corresponding path program 1 times [2024-01-31 16:43:32,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:32,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744499715] [2024-01-31 16:43:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:32,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:43:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:43:32,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:43:32,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744499715] [2024-01-31 16:43:32,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744499715] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:43:32,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:43:32,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:43:32,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102552651] [2024-01-31 16:43:32,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:43:32,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:43:32,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:43:32,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:43:32,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:43:32,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 32 [2024-01-31 16:43:32,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 292 flow. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:32,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:43:32,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 32 [2024-01-31 16:43:32,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:43:36,760 INFO L124 PetriNetUnfolderBase]: 58697/82515 cut-off events. [2024-01-31 16:43:36,761 INFO L125 PetriNetUnfolderBase]: For 70380/70380 co-relation queries the response was YES. [2024-01-31 16:43:36,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228614 conditions, 82515 events. 58697/82515 cut-off events. For 70380/70380 co-relation queries the response was YES. Maximal size of possible extension queue 3926. Compared 586599 event pairs, 11512 based on Foata normal form. 0/68317 useless extension candidates. Maximal degree in co-relation 228529. Up to 27030 conditions per place. [2024-01-31 16:43:37,241 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 123 selfloop transitions, 34 changer transitions 0/158 dead transitions. [2024-01-31 16:43:37,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 158 transitions, 1144 flow [2024-01-31 16:43:37,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:43:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:43:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-01-31 16:43:37,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-01-31 16:43:37,243 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 292 flow. Second operand 6 states and 132 transitions. [2024-01-31 16:43:37,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 158 transitions, 1144 flow [2024-01-31 16:43:37,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 158 transitions, 1076 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:43:37,540 INFO L231 Difference]: Finished difference. Result has 55 places, 75 transitions, 613 flow [2024-01-31 16:43:37,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=613, PETRI_PLACES=55, PETRI_TRANSITIONS=75} [2024-01-31 16:43:37,541 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-01-31 16:43:37,542 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 75 transitions, 613 flow [2024-01-31 16:43:37,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:37,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:37,542 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:43:37,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-31 16:43:37,542 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:43:37,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:37,543 INFO L85 PathProgramCache]: Analyzing trace with hash -732130534, now seen corresponding path program 2 times [2024-01-31 16:43:37,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:37,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196064625] [2024-01-31 16:43:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:37,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:43:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:43:37,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:43:37,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196064625] [2024-01-31 16:43:37,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196064625] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:43:37,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:43:37,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:43:37,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536277563] [2024-01-31 16:43:37,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:43:37,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:43:37,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:43:37,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:43:37,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:43:37,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 32 [2024-01-31 16:43:37,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 75 transitions, 613 flow. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:37,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:43:37,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 32 [2024-01-31 16:43:37,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:43:43,235 INFO L124 PetriNetUnfolderBase]: 65426/93393 cut-off events. [2024-01-31 16:43:43,235 INFO L125 PetriNetUnfolderBase]: For 151589/151589 co-relation queries the response was YES. [2024-01-31 16:43:43,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296917 conditions, 93393 events. 65426/93393 cut-off events. For 151589/151589 co-relation queries the response was YES. Maximal size of possible extension queue 4655. Compared 697201 event pairs, 10319 based on Foata normal form. 1558/86191 useless extension candidates. Maximal degree in co-relation 154538. Up to 28324 conditions per place. [2024-01-31 16:43:44,107 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 139 selfloop transitions, 60 changer transitions 0/200 dead transitions. [2024-01-31 16:43:44,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 200 transitions, 1749 flow [2024-01-31 16:43:44,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:43:44,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:43:44,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-01-31 16:43:44,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2024-01-31 16:43:44,108 INFO L175 Difference]: Start difference. First operand has 55 places, 75 transitions, 613 flow. Second operand 7 states and 142 transitions. [2024-01-31 16:43:44,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 200 transitions, 1749 flow [2024-01-31 16:43:44,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 200 transitions, 1749 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:43:44,573 INFO L231 Difference]: Finished difference. Result has 65 places, 110 transitions, 1247 flow [2024-01-31 16:43:44,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1247, PETRI_PLACES=65, PETRI_TRANSITIONS=110} [2024-01-31 16:43:44,574 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-01-31 16:43:44,574 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 110 transitions, 1247 flow [2024-01-31 16:43:44,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:44,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:44,574 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2024-01-31 16:43:44,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 16:43:44,575 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:43:44,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:44,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1809037756, now seen corresponding path program 1 times [2024-01-31 16:43:44,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:44,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208371412] [2024-01-31 16:43:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:44,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:43:44,597 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:43:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:43:44,605 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:43:44,605 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:43:44,605 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2024-01-31 16:43:44,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 11 remaining) [2024-01-31 16:43:44,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (8 of 11 remaining) [2024-01-31 16:43:44,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 11 remaining) [2024-01-31 16:43:44,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 11 remaining) [2024-01-31 16:43:44,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 11 remaining) [2024-01-31 16:43:44,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 11 remaining) [2024-01-31 16:43:44,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 11 remaining) [2024-01-31 16:43:44,608 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 11 remaining) [2024-01-31 16:43:44,608 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 11 remaining) [2024-01-31 16:43:44,608 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 11 remaining) [2024-01-31 16:43:44,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 16:43:44,608 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2024-01-31 16:43:44,609 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:43:44,609 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-01-31 16:43:44,626 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:43:44,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 39 transitions, 118 flow [2024-01-31 16:43:44,629 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-01-31 16:43:44,629 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-31 16:43:44,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 49 events. 0/49 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 129 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2024-01-31 16:43:44,630 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 39 transitions, 118 flow [2024-01-31 16:43:44,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 39 transitions, 118 flow [2024-01-31 16:43:44,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:43:44,631 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;@4550edfb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:43:44,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-01-31 16:43:44,632 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:43:44,632 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-01-31 16:43:44,632 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:43:44,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:44,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:43:44,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 16:43:44,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:44,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1221677878, now seen corresponding path program 1 times [2024-01-31 16:43:44,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:44,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575634859] [2024-01-31 16:43:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:44,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:43:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:43:44,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:43:44,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575634859] [2024-01-31 16:43:44,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575634859] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:43:44,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:43:44,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:43:44,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712423107] [2024-01-31 16:43:44,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:43:44,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:43:44,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:43:44,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:43:44,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:43:44,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 39 [2024-01-31 16:43:44,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:44,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:43:44,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 39 [2024-01-31 16:43:44,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:43:56,459 INFO L124 PetriNetUnfolderBase]: 203739/260209 cut-off events. [2024-01-31 16:43:56,459 INFO L125 PetriNetUnfolderBase]: For 63139/63139 co-relation queries the response was YES. [2024-01-31 16:43:56,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542614 conditions, 260209 events. 203739/260209 cut-off events. For 63139/63139 co-relation queries the response was YES. Maximal size of possible extension queue 7285. Compared 1558496 event pairs, 126106 based on Foata normal form. 0/187769 useless extension candidates. Maximal degree in co-relation 62293. Up to 181483 conditions per place. [2024-01-31 16:43:58,060 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 62 selfloop transitions, 6 changer transitions 0/69 dead transitions. [2024-01-31 16:43:58,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 346 flow [2024-01-31 16:43:58,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:43:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:43:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-01-31 16:43:58,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-01-31 16:43:58,063 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 118 flow. Second operand 3 states and 75 transitions. [2024-01-31 16:43:58,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 346 flow [2024-01-31 16:43:58,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 69 transitions, 322 flow, removed 12 selfloop flow, removed 0 redundant places. [2024-01-31 16:43:58,080 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 152 flow [2024-01-31 16:43:58,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2024-01-31 16:43:58,080 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2024-01-31 16:43:58,080 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 152 flow [2024-01-31 16:43:58,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:58,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:58,081 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-01-31 16:43:58,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 16:43:58,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 16:43:58,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:58,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1513936383, now seen corresponding path program 1 times [2024-01-31 16:43:58,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:58,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234392772] [2024-01-31 16:43:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:58,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:43:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:43:58,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:43:58,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234392772] [2024-01-31 16:43:58,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234392772] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:43:58,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:43:58,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:43:58,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726659302] [2024-01-31 16:43:58,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:43:58,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:43:58,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:43:58,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:43:58,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:43:58,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 39 [2024-01-31 16:43:58,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:58,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:43:58,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 39 [2024-01-31 16:43:58,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand