./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-commit-2.wvr.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/weaver/popl20-commit-2.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-commit-2.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 17:02:52,498 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:02:52,575 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:02:52,580 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:02:52,581 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:02:52,627 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:02:52,628 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:02:52,628 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:02:52,629 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:02:52,631 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:02:52,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:02:52,632 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:02:52,632 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:02:52,632 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:02:52,633 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:02:52,633 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:02:52,633 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:02:52,634 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:02:52,651 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:02:52,652 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:02:52,652 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:02:52,652 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:02:52,652 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:02:52,653 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:02:52,653 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:02:52,653 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:02:52,654 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:02:52,654 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:02:52,654 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:02:52,655 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:02:52,656 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:02:52,656 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:02:52,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:02:52,656 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:02:52,657 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:02:52,657 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:02:52,657 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:02:52,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:02:52,657 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:02:52,658 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:02:52,658 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:02:52,658 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:02:52,659 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:02:52,659 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:02:52,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:02:52,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:02:52,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:02:52,931 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:02:52,932 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:02:52,933 INFO L431 ainManager$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/popl20-commit-2.wvr.yml/witness.yml [2024-01-31 17:02:53,176 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:02:53,177 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:02:53,178 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c [2024-01-31 17:02:54,363 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:02:54,568 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:02:54,577 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c [2024-01-31 17:02:54,586 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72718d50a/bb6e4ad47aab4b91b1f70656d71eaa8a/FLAGb1c932d4b [2024-01-31 17:02:54,601 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72718d50a/bb6e4ad47aab4b91b1f70656d71eaa8a [2024-01-31 17:02:54,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:02:54,604 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:02:54,606 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:02:54,606 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:02:54,610 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:02:54,611 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:02:53" (1/2) ... [2024-01-31 17:02:54,612 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73facc2e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:54, skipping insertion in model container [2024-01-31 17:02:54,613 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:02:53" (1/2) ... [2024-01-31 17:02:54,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@241e4269 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:54, skipping insertion in model container [2024-01-31 17:02:54,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:02:54" (2/2) ... [2024-01-31 17:02:54,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73facc2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:54, skipping insertion in model container [2024-01-31 17:02:54,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:02:54" (2/2) ... [2024-01-31 17:02:54,615 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:02:54,760 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 17:02:54,794 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:02:55,016 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c[5898,5911] [2024-01-31 17:02:55,029 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:02:55,038 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:02:55,071 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c[5898,5911] [2024-01-31 17:02:55,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:02:55,094 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:02:55,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:55 WrapperNode [2024-01-31 17:02:55,095 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:02:55,096 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:02:55,096 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:02:55,096 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:02:55,103 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:55" (1/1) ... [2024-01-31 17:02:55,115 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:55" (1/1) ... [2024-01-31 17:02:55,155 INFO L138 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 481 [2024-01-31 17:02:55,155 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:02:55,156 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:02:55,156 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:02:55,156 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:02:55,166 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:55" (1/1) ... [2024-01-31 17:02:55,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:55" (1/1) ... [2024-01-31 17:02:55,181 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:55" (1/1) ... [2024-01-31 17:02:55,205 INFO L175 MemorySlicer]: Split 26 memory accesses to 6 slices as follows [2, 2, 2, 2, 16, 2]. 62 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 8 writes are split as follows [0, 1, 1, 1, 4, 1]. [2024-01-31 17:02:55,205 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:55" (1/1) ... [2024-01-31 17:02:55,205 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:55" (1/1) ... [2024-01-31 17:02:55,216 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:55" (1/1) ... [2024-01-31 17:02:55,232 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:55" (1/1) ... [2024-01-31 17:02:55,247 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:55" (1/1) ... [2024-01-31 17:02:55,250 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:55" (1/1) ... [2024-01-31 17:02:55,254 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:02:55,255 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:02:55,255 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:02:55,255 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:02:55,256 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:55" (1/1) ... [2024-01-31 17:02:55,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:02:55,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:55,297 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 17:02:55,317 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 17:02:55,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:02:55,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:02:55,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:02:55,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:02:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:02:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:02:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 17:02:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-01-31 17:02:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:02:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:02:55,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:02:55,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:02:55,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 17:02:55,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-01-31 17:02:55,342 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:02:55,342 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:02:55,342 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:02:55,343 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:02:55,343 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-31 17:02:55,344 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-31 17:02:55,344 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-01-31 17:02:55,344 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-01-31 17:02:55,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:02:55,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:02:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:02:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:02:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 17:02:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-01-31 17:02:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:02:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:02:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 17:02:55,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:02:55,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:02:55,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:02:55,348 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 17:02:55,514 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:02:55,515 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:02:56,119 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:02:56,119 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:02:56,536 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:02:56,536 INFO L320 CfgBuilder]: Removed 8 assume(true) statements. [2024-01-31 17:02:56,537 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:02:56 BoogieIcfgContainer [2024-01-31 17:02:56,537 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:02:56,539 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:02:56,539 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:02:56,543 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:02:56,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:02:53" (1/4) ... [2024-01-31 17:02:56,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7999fe46 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:02:56, skipping insertion in model container [2024-01-31 17:02:56,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:02:54" (2/4) ... [2024-01-31 17:02:56,544 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7999fe46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:02:56, skipping insertion in model container [2024-01-31 17:02:56,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:55" (3/4) ... [2024-01-31 17:02:56,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7999fe46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:02:56, skipping insertion in model container [2024-01-31 17:02:56,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:02:56" (4/4) ... [2024-01-31 17:02:56,546 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-2.wvr.c [2024-01-31 17:02:56,563 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:02:56,564 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:02:56,564 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:02:56,647 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-01-31 17:02:56,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 67 transitions, 162 flow [2024-01-31 17:02:56,733 INFO L124 PetriNetUnfolderBase]: 12/63 cut-off events. [2024-01-31 17:02:56,733 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-31 17:02:56,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 63 events. 12/63 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 124 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2024-01-31 17:02:56,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 67 transitions, 162 flow [2024-01-31 17:02:56,741 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 62 transitions, 148 flow [2024-01-31 17:02:56,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:02:56,761 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;@67913556, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:02:56,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-31 17:02:56,786 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:02:56,787 INFO L124 PetriNetUnfolderBase]: 12/61 cut-off events. [2024-01-31 17:02:56,787 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-31 17:02:56,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:56,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:56,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:02:56,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:56,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1720908153, now seen corresponding path program 1 times [2024-01-31 17:02:56,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:56,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420006707] [2024-01-31 17:02:56,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:56,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:57,142 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 17:02:57,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:57,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420006707] [2024-01-31 17:02:57,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420006707] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:57,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:57,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:02:57,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795057628] [2024-01-31 17:02:57,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:57,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-31 17:02:57,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:57,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-31 17:02:57,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-31 17:02:57,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 67 [2024-01-31 17:02:57,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 148 flow. Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:57,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:57,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 67 [2024-01-31 17:02:57,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:00,234 INFO L124 PetriNetUnfolderBase]: 21540/28834 cut-off events. [2024-01-31 17:03:00,234 INFO L125 PetriNetUnfolderBase]: For 947/947 co-relation queries the response was YES. [2024-01-31 17:03:00,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57080 conditions, 28834 events. 21540/28834 cut-off events. For 947/947 co-relation queries the response was YES. Maximal size of possible extension queue 1455. Compared 168329 event pairs, 15300 based on Foata normal form. 6102/28420 useless extension candidates. Maximal degree in co-relation 52368. Up to 27120 conditions per place. [2024-01-31 17:03:00,472 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 49 selfloop transitions, 0 changer transitions 0/58 dead transitions. [2024-01-31 17:03:00,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 58 transitions, 238 flow [2024-01-31 17:03:00,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-31 17:03:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-31 17:03:00,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 79 transitions. [2024-01-31 17:03:00,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5895522388059702 [2024-01-31 17:03:00,486 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 148 flow. Second operand 2 states and 79 transitions. [2024-01-31 17:03:00,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 58 transitions, 238 flow [2024-01-31 17:03:00,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 222 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-31 17:03:00,622 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 124 flow [2024-01-31 17:03:00,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=124, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2024-01-31 17:03:00,627 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -7 predicate places. [2024-01-31 17:03:00,627 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 124 flow [2024-01-31 17:03:00,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:00,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:00,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:00,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:03:00,629 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:00,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:00,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1033285541, now seen corresponding path program 1 times [2024-01-31 17:03:00,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:00,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236825936] [2024-01-31 17:03:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:00,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:00,947 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 17:03:00,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:00,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236825936] [2024-01-31 17:03:00,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236825936] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:00,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:00,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:03:00,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555547107] [2024-01-31 17:03:00,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:00,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:03:00,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:00,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:03:00,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:03:00,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 67 [2024-01-31 17:03:00,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 17:03:00,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:00,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 67 [2024-01-31 17:03:00,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:03,591 INFO L124 PetriNetUnfolderBase]: 25404/34585 cut-off events. [2024-01-31 17:03:03,591 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2024-01-31 17:03:03,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67218 conditions, 34585 events. 25404/34585 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 1842. Compared 220909 event pairs, 4827 based on Foata normal form. 1/27197 useless extension candidates. Maximal degree in co-relation 67215. Up to 28678 conditions per place. [2024-01-31 17:03:03,777 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 74 selfloop transitions, 5 changer transitions 1/89 dead transitions. [2024-01-31 17:03:03,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 89 transitions, 353 flow [2024-01-31 17:03:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:03:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:03:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2024-01-31 17:03:03,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5970149253731343 [2024-01-31 17:03:03,780 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 124 flow. Second operand 3 states and 120 transitions. [2024-01-31 17:03:03,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 89 transitions, 353 flow [2024-01-31 17:03:03,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 89 transitions, 353 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 17:03:03,783 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 157 flow [2024-01-31 17:03:03,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2024-01-31 17:03:03,784 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -4 predicate places. [2024-01-31 17:03:03,784 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 157 flow [2024-01-31 17:03:03,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 17:03:03,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:03,785 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:03,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:03:03,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:03,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:03,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1975214853, now seen corresponding path program 1 times [2024-01-31 17:03:03,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:03,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305205272] [2024-01-31 17:03:03,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:03,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:03,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:03,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305205272] [2024-01-31 17:03:03,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305205272] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:03,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:03,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:03:03,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607872230] [2024-01-31 17:03:03,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:03,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:03:03,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:03,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:03:03,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:03:03,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 67 [2024-01-31 17:03:03,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 17:03:03,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:03,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 67 [2024-01-31 17:03:03,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:06,712 INFO L124 PetriNetUnfolderBase]: 29228/39096 cut-off events. [2024-01-31 17:03:06,712 INFO L125 PetriNetUnfolderBase]: For 3759/3759 co-relation queries the response was YES. [2024-01-31 17:03:06,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82216 conditions, 39096 events. 29228/39096 cut-off events. For 3759/3759 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 241556 event pairs, 9136 based on Foata normal form. 712/31462 useless extension candidates. Maximal degree in co-relation 82211. Up to 25170 conditions per place. [2024-01-31 17:03:06,899 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 83 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2024-01-31 17:03:06,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 403 flow [2024-01-31 17:03:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:03:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:03:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-01-31 17:03:06,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6069651741293532 [2024-01-31 17:03:06,905 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 157 flow. Second operand 3 states and 122 transitions. [2024-01-31 17:03:06,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 403 flow [2024-01-31 17:03:06,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 94 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:03:06,910 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 160 flow [2024-01-31 17:03:06,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2024-01-31 17:03:06,912 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2024-01-31 17:03:06,912 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 160 flow [2024-01-31 17:03:06,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 17:03:06,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:06,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:06,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:03:06,913 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:06,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:06,914 INFO L85 PathProgramCache]: Analyzing trace with hash -898977767, now seen corresponding path program 1 times [2024-01-31 17:03:06,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:06,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609233285] [2024-01-31 17:03:06,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:06,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:07,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:07,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609233285] [2024-01-31 17:03:07,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609233285] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:07,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:07,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:03:07,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480997984] [2024-01-31 17:03:07,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:07,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:03:07,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:07,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:03:07,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:03:07,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 67 [2024-01-31 17:03:07,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 17:03:07,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:07,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 67 [2024-01-31 17:03:07,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:09,487 INFO L124 PetriNetUnfolderBase]: 26634/35906 cut-off events. [2024-01-31 17:03:09,487 INFO L125 PetriNetUnfolderBase]: For 5045/5045 co-relation queries the response was YES. [2024-01-31 17:03:09,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76328 conditions, 35906 events. 26634/35906 cut-off events. For 5045/5045 co-relation queries the response was YES. Maximal size of possible extension queue 1532. Compared 222066 event pairs, 7732 based on Foata normal form. 584/28910 useless extension candidates. Maximal degree in co-relation 76322. Up to 25177 conditions per place. [2024-01-31 17:03:09,661 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 83 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2024-01-31 17:03:09,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 94 transitions, 409 flow [2024-01-31 17:03:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:03:09,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:03:09,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2024-01-31 17:03:09,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6119402985074627 [2024-01-31 17:03:09,663 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 160 flow. Second operand 3 states and 123 transitions. [2024-01-31 17:03:09,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 94 transitions, 409 flow [2024-01-31 17:03:09,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 94 transitions, 407 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:03:09,666 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 166 flow [2024-01-31 17:03:09,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-01-31 17:03:09,670 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2024-01-31 17:03:09,670 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 166 flow [2024-01-31 17:03:09,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 17:03:09,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:09,672 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:09,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:03:09,673 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:09,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:09,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1523087807, now seen corresponding path program 1 times [2024-01-31 17:03:09,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:09,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718457585] [2024-01-31 17:03:09,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:09,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:09,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:09,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718457585] [2024-01-31 17:03:09,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718457585] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:09,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:09,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:03:09,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9980318] [2024-01-31 17:03:09,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:09,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:03:09,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:09,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:03:09,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:03:09,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 67 [2024-01-31 17:03:09,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 17:03:09,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:09,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 67 [2024-01-31 17:03:09,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:12,276 INFO L124 PetriNetUnfolderBase]: 28489/38288 cut-off events. [2024-01-31 17:03:12,276 INFO L125 PetriNetUnfolderBase]: For 6992/6992 co-relation queries the response was YES. [2024-01-31 17:03:12,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83131 conditions, 38288 events. 28489/38288 cut-off events. For 6992/6992 co-relation queries the response was YES. Maximal size of possible extension queue 1482. Compared 231192 event pairs, 8067 based on Foata normal form. 466/30870 useless extension candidates. Maximal degree in co-relation 83124. Up to 25285 conditions per place. [2024-01-31 17:03:12,443 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 75 selfloop transitions, 2 changer transitions 9/95 dead transitions. [2024-01-31 17:03:12,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 95 transitions, 417 flow [2024-01-31 17:03:12,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:03:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:03:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-01-31 17:03:12,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6268656716417911 [2024-01-31 17:03:12,446 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 166 flow. Second operand 3 states and 126 transitions. [2024-01-31 17:03:12,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 95 transitions, 417 flow [2024-01-31 17:03:12,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 95 transitions, 415 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:03:12,450 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 172 flow [2024-01-31 17:03:12,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-01-31 17:03:12,451 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2024-01-31 17:03:12,451 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 172 flow [2024-01-31 17:03:12,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 17:03:12,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:12,451 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:12,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 17:03:12,452 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:12,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:12,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1209342747, now seen corresponding path program 1 times [2024-01-31 17:03:12,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:12,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575186936] [2024-01-31 17:03:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:12,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:12,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:12,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575186936] [2024-01-31 17:03:12,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575186936] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:12,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:12,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:03:12,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488306545] [2024-01-31 17:03:12,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:12,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:03:12,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:12,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:03:12,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:03:12,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 67 [2024-01-31 17:03:12,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:12,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:12,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 67 [2024-01-31 17:03:12,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:14,330 INFO L124 PetriNetUnfolderBase]: 17001/22810 cut-off events. [2024-01-31 17:03:14,330 INFO L125 PetriNetUnfolderBase]: For 5909/5909 co-relation queries the response was YES. [2024-01-31 17:03:14,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50645 conditions, 22810 events. 17001/22810 cut-off events. For 5909/5909 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 130153 event pairs, 7153 based on Foata normal form. 170/18319 useless extension candidates. Maximal degree in co-relation 50637. Up to 19171 conditions per place. [2024-01-31 17:03:14,420 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 61 selfloop transitions, 2 changer transitions 11/83 dead transitions. [2024-01-31 17:03:14,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 366 flow [2024-01-31 17:03:14,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:03:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:03:14,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2024-01-31 17:03:14,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472636815920398 [2024-01-31 17:03:14,422 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 172 flow. Second operand 3 states and 110 transitions. [2024-01-31 17:03:14,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 366 flow [2024-01-31 17:03:14,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:03:14,424 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 182 flow [2024-01-31 17:03:14,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-01-31 17:03:14,425 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2024-01-31 17:03:14,425 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 182 flow [2024-01-31 17:03:14,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:14,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:14,426 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:14,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 17:03:14,426 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:14,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:14,427 INFO L85 PathProgramCache]: Analyzing trace with hash 143744811, now seen corresponding path program 1 times [2024-01-31 17:03:14,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:14,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43245254] [2024-01-31 17:03:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:14,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:14,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:14,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43245254] [2024-01-31 17:03:14,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43245254] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:14,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:14,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:03:14,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832980988] [2024-01-31 17:03:14,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:14,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:03:14,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:14,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:03:14,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:03:14,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 67 [2024-01-31 17:03:14,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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 17:03:14,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:14,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 67 [2024-01-31 17:03:14,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:16,512 INFO L124 PetriNetUnfolderBase]: 18972/25846 cut-off events. [2024-01-31 17:03:16,512 INFO L125 PetriNetUnfolderBase]: For 6210/6210 co-relation queries the response was YES. [2024-01-31 17:03:16,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57630 conditions, 25846 events. 18972/25846 cut-off events. For 6210/6210 co-relation queries the response was YES. Maximal size of possible extension queue 1055. Compared 155394 event pairs, 15288 based on Foata normal form. 170/20523 useless extension candidates. Maximal degree in co-relation 57621. Up to 21994 conditions per place. [2024-01-31 17:03:16,622 INFO L140 encePairwiseOnDemand]: 57/67 looper letters, 53 selfloop transitions, 2 changer transitions 40/104 dead transitions. [2024-01-31 17:03:16,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 104 transitions, 462 flow [2024-01-31 17:03:16,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:03:16,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:03:16,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-01-31 17:03:16,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46567164179104475 [2024-01-31 17:03:16,623 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 182 flow. Second operand 5 states and 156 transitions. [2024-01-31 17:03:16,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 104 transitions, 462 flow [2024-01-31 17:03:16,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:03:16,628 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 206 flow [2024-01-31 17:03:16,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2024-01-31 17:03:16,628 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2024-01-31 17:03:16,629 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 206 flow [2024-01-31 17:03:16,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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 17:03:16,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:16,629 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:16,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 17:03:16,630 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:16,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:16,630 INFO L85 PathProgramCache]: Analyzing trace with hash -506709647, now seen corresponding path program 1 times [2024-01-31 17:03:16,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:16,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894819330] [2024-01-31 17:03:16,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:16,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:03:16,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:16,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894819330] [2024-01-31 17:03:16,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894819330] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:16,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:16,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:03:16,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287173174] [2024-01-31 17:03:16,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:16,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:03:16,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:16,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:03:16,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:03:16,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 67 [2024-01-31 17:03:16,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 17:03:16,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:16,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 67 [2024-01-31 17:03:16,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:18,930 INFO L124 PetriNetUnfolderBase]: 20168/27573 cut-off events. [2024-01-31 17:03:18,931 INFO L125 PetriNetUnfolderBase]: For 7082/7082 co-relation queries the response was YES. [2024-01-31 17:03:18,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61680 conditions, 27573 events. 20168/27573 cut-off events. For 7082/7082 co-relation queries the response was YES. Maximal size of possible extension queue 1057. Compared 167154 event pairs, 16328 based on Foata normal form. 72/21858 useless extension candidates. Maximal degree in co-relation 61668. Up to 21992 conditions per place. [2024-01-31 17:03:19,035 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 53 selfloop transitions, 3 changer transitions 42/107 dead transitions. [2024-01-31 17:03:19,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 528 flow [2024-01-31 17:03:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:03:19,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:03:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2024-01-31 17:03:19,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5410447761194029 [2024-01-31 17:03:19,036 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 206 flow. Second operand 4 states and 145 transitions. [2024-01-31 17:03:19,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 528 flow [2024-01-31 17:03:19,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 496 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-01-31 17:03:19,045 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 206 flow [2024-01-31 17:03:19,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2024-01-31 17:03:19,046 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2024-01-31 17:03:19,046 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 206 flow [2024-01-31 17:03:19,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 17:03:19,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:19,047 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:19,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 17:03:19,047 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:19,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:19,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1073150967, now seen corresponding path program 1 times [2024-01-31 17:03:19,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:19,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801116475] [2024-01-31 17:03:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:19,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:03:19,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:19,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801116475] [2024-01-31 17:03:19,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801116475] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:19,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:19,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:03:19,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457441555] [2024-01-31 17:03:19,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:19,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:03:19,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:19,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:03:19,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:03:19,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 67 [2024-01-31 17:03:19,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 17:03:19,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:19,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 67 [2024-01-31 17:03:19,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:21,352 INFO L124 PetriNetUnfolderBase]: 19480/26554 cut-off events. [2024-01-31 17:03:21,352 INFO L125 PetriNetUnfolderBase]: For 6373/6373 co-relation queries the response was YES. [2024-01-31 17:03:21,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59195 conditions, 26554 events. 19480/26554 cut-off events. For 6373/6373 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 159901 event pairs, 15800 based on Foata normal form. 32/20968 useless extension candidates. Maximal degree in co-relation 59183. Up to 21990 conditions per place. [2024-01-31 17:03:21,652 INFO L140 encePairwiseOnDemand]: 57/67 looper letters, 51 selfloop transitions, 6 changer transitions 34/100 dead transitions. [2024-01-31 17:03:21,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 100 transitions, 472 flow [2024-01-31 17:03:21,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:03:21,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:03:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-01-31 17:03:21,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4537313432835821 [2024-01-31 17:03:21,654 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 206 flow. Second operand 5 states and 152 transitions. [2024-01-31 17:03:21,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 100 transitions, 472 flow [2024-01-31 17:03:21,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 100 transitions, 462 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-31 17:03:21,657 INFO L231 Difference]: Finished difference. Result has 77 places, 66 transitions, 230 flow [2024-01-31 17:03:21,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=77, PETRI_TRANSITIONS=66} [2024-01-31 17:03:21,658 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 14 predicate places. [2024-01-31 17:03:21,658 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 66 transitions, 230 flow [2024-01-31 17:03:21,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 17:03:21,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:21,659 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:21,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 17:03:21,659 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:21,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:21,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1319485751, now seen corresponding path program 1 times [2024-01-31 17:03:21,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:21,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355156623] [2024-01-31 17:03:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:21,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:03:21,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:21,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355156623] [2024-01-31 17:03:21,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355156623] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:21,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:21,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:03:21,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78756980] [2024-01-31 17:03:21,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:21,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:03:21,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:21,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:03:21,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:03:21,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 67 [2024-01-31 17:03:21,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 66 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 17:03:21,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:21,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 67 [2024-01-31 17:03:21,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:23,858 INFO L124 PetriNetUnfolderBase]: 19578/26707 cut-off events. [2024-01-31 17:03:23,858 INFO L125 PetriNetUnfolderBase]: For 6348/6348 co-relation queries the response was YES. [2024-01-31 17:03:23,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59548 conditions, 26707 events. 19578/26707 cut-off events. For 6348/6348 co-relation queries the response was YES. Maximal size of possible extension queue 1057. Compared 161607 event pairs, 15884 based on Foata normal form. 48/21112 useless extension candidates. Maximal degree in co-relation 59534. Up to 21988 conditions per place. [2024-01-31 17:03:23,978 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 55 selfloop transitions, 3 changer transitions 33/100 dead transitions. [2024-01-31 17:03:23,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 100 transitions, 506 flow [2024-01-31 17:03:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:03:23,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:03:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-01-31 17:03:23,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074626865671642 [2024-01-31 17:03:23,979 INFO L175 Difference]: Start difference. First operand has 77 places, 66 transitions, 230 flow. Second operand 4 states and 136 transitions. [2024-01-31 17:03:23,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 100 transitions, 506 flow [2024-01-31 17:03:23,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 100 transitions, 478 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-01-31 17:03:23,984 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 226 flow [2024-01-31 17:03:23,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2024-01-31 17:03:23,985 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 15 predicate places. [2024-01-31 17:03:23,985 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 226 flow [2024-01-31 17:03:23,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 17:03:23,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:23,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:23,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-31 17:03:23,986 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:23,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:23,986 INFO L85 PathProgramCache]: Analyzing trace with hash -437611202, now seen corresponding path program 1 times [2024-01-31 17:03:23,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:23,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836892751] [2024-01-31 17:03:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:23,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:03:24,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:24,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836892751] [2024-01-31 17:03:24,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836892751] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:24,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201869110] [2024-01-31 17:03:24,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:24,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:24,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:24,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:03:24,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 17:03:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:24,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:03:24,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:03:24,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:03:24,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201869110] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:24,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:24,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-01-31 17:03:24,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989748297] [2024-01-31 17:03:24,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:24,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:03:24,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:24,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:03:24,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:03:24,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 67 [2024-01-31 17:03:24,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 226 flow. Second operand has 12 states, 12 states have (on average 17.833333333333332) internal successors, (214), 12 states have internal predecessors, (214), 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 17:03:24,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:24,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 67 [2024-01-31 17:03:24,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:26,947 INFO L124 PetriNetUnfolderBase]: 19650/26740 cut-off events. [2024-01-31 17:03:26,947 INFO L125 PetriNetUnfolderBase]: For 6673/6673 co-relation queries the response was YES. [2024-01-31 17:03:27,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59816 conditions, 26740 events. 19650/26740 cut-off events. For 6673/6673 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 159151 event pairs, 9128 based on Foata normal form. 78/21166 useless extension candidates. Maximal degree in co-relation 59802. Up to 19171 conditions per place. [2024-01-31 17:03:27,252 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 64 selfloop transitions, 4 changer transitions 77/154 dead transitions. [2024-01-31 17:03:27,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 154 transitions, 755 flow [2024-01-31 17:03:27,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 17:03:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 17:03:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 255 transitions. [2024-01-31 17:03:27,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228855721393035 [2024-01-31 17:03:27,254 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 226 flow. Second operand 9 states and 255 transitions. [2024-01-31 17:03:27,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 154 transitions, 755 flow [2024-01-31 17:03:27,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 154 transitions, 738 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-01-31 17:03:27,257 INFO L231 Difference]: Finished difference. Result has 87 places, 68 transitions, 244 flow [2024-01-31 17:03:27,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=244, PETRI_PLACES=87, PETRI_TRANSITIONS=68} [2024-01-31 17:03:27,258 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 24 predicate places. [2024-01-31 17:03:27,258 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 68 transitions, 244 flow [2024-01-31 17:03:27,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.833333333333332) internal successors, (214), 12 states have internal predecessors, (214), 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 17:03:27,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:27,258 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:27,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 17:03:27,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-31 17:03:27,459 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:27,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:27,460 INFO L85 PathProgramCache]: Analyzing trace with hash 739708720, now seen corresponding path program 2 times [2024-01-31 17:03:27,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:27,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006339138] [2024-01-31 17:03:27,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:27,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-31 17:03:27,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:27,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006339138] [2024-01-31 17:03:27,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006339138] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:27,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426276220] [2024-01-31 17:03:27,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:03:27,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:27,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:27,697 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:03:27,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 17:03:27,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:03:27,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:27,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:03:27,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 17:03:27,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 17:03:28,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426276220] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:28,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:28,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-01-31 17:03:28,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842979441] [2024-01-31 17:03:28,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:28,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 17:03:28,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:28,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 17:03:28,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-01-31 17:03:28,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 67 [2024-01-31 17:03:28,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 68 transitions, 244 flow. Second operand has 10 states, 10 states have (on average 18.5) internal successors, (185), 10 states have internal predecessors, (185), 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 17:03:28,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:28,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 67 [2024-01-31 17:03:28,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:30,464 INFO L124 PetriNetUnfolderBase]: 22186/30403 cut-off events. [2024-01-31 17:03:30,464 INFO L125 PetriNetUnfolderBase]: For 11009/11009 co-relation queries the response was YES. [2024-01-31 17:03:30,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70311 conditions, 30403 events. 22186/30403 cut-off events. For 11009/11009 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 187649 event pairs, 16328 based on Foata normal form. 806/24869 useless extension candidates. Maximal degree in co-relation 70294. Up to 21994 conditions per place. [2024-01-31 17:03:30,596 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 54 selfloop transitions, 6 changer transitions 70/139 dead transitions. [2024-01-31 17:03:30,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 139 transitions, 726 flow [2024-01-31 17:03:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:03:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:03:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-01-31 17:03:30,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42350746268656714 [2024-01-31 17:03:30,598 INFO L175 Difference]: Start difference. First operand has 87 places, 68 transitions, 244 flow. Second operand 8 states and 227 transitions. [2024-01-31 17:03:30,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 139 transitions, 726 flow [2024-01-31 17:03:30,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 139 transitions, 706 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-01-31 17:03:30,601 INFO L231 Difference]: Finished difference. Result has 88 places, 69 transitions, 260 flow [2024-01-31 17:03:30,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=260, PETRI_PLACES=88, PETRI_TRANSITIONS=69} [2024-01-31 17:03:30,602 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2024-01-31 17:03:30,602 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 69 transitions, 260 flow [2024-01-31 17:03:30,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.5) internal successors, (185), 10 states have internal predecessors, (185), 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 17:03:30,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:30,602 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:30,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:30,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-31 17:03:30,817 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:30,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:30,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1048554486, now seen corresponding path program 3 times [2024-01-31 17:03:30,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:30,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146755185] [2024-01-31 17:03:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:30,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-31 17:03:30,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:30,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146755185] [2024-01-31 17:03:30,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146755185] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:30,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:30,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:03:30,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668380090] [2024-01-31 17:03:30,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:30,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:03:30,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:30,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:03:30,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:03:30,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 67 [2024-01-31 17:03:30,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 69 transitions, 260 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 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 17:03:30,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:30,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 67 [2024-01-31 17:03:30,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:36,007 INFO L124 PetriNetUnfolderBase]: 42927/57556 cut-off events. [2024-01-31 17:03:36,007 INFO L125 PetriNetUnfolderBase]: For 29879/29879 co-relation queries the response was YES. [2024-01-31 17:03:36,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139836 conditions, 57556 events. 42927/57556 cut-off events. For 29879/29879 co-relation queries the response was YES. Maximal size of possible extension queue 2132. Compared 358846 event pairs, 15810 based on Foata normal form. 1168/47482 useless extension candidates. Maximal degree in co-relation 139818. Up to 19717 conditions per place. [2024-01-31 17:03:36,356 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 115 selfloop transitions, 12 changer transitions 0/136 dead transitions. [2024-01-31 17:03:36,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 136 transitions, 732 flow [2024-01-31 17:03:36,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:03:36,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:03:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 167 transitions. [2024-01-31 17:03:36,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231343283582089 [2024-01-31 17:03:36,358 INFO L175 Difference]: Start difference. First operand has 88 places, 69 transitions, 260 flow. Second operand 4 states and 167 transitions. [2024-01-31 17:03:36,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 136 transitions, 732 flow [2024-01-31 17:03:36,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 136 transitions, 700 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-01-31 17:03:36,434 INFO L231 Difference]: Finished difference. Result has 86 places, 78 transitions, 336 flow [2024-01-31 17:03:36,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=86, PETRI_TRANSITIONS=78} [2024-01-31 17:03:36,435 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 23 predicate places. [2024-01-31 17:03:36,435 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 78 transitions, 336 flow [2024-01-31 17:03:36,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 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 17:03:36,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:36,435 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:36,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 17:03:36,436 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:36,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:36,436 INFO L85 PathProgramCache]: Analyzing trace with hash 606942472, now seen corresponding path program 1 times [2024-01-31 17:03:36,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:36,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011869061] [2024-01-31 17:03:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:36,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-31 17:03:36,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:36,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011869061] [2024-01-31 17:03:36,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011869061] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:36,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109193429] [2024-01-31 17:03:36,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:36,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:36,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:36,724 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:03:36,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 17:03:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:36,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 17:03:36,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 17:03:36,986 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:03:36,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109193429] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:36,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 17:03:36,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2024-01-31 17:03:36,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689699506] [2024-01-31 17:03:36,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:36,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:03:36,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:36,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:03:36,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-01-31 17:03:36,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 67 [2024-01-31 17:03:36,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 78 transitions, 336 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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 17:03:36,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:36,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 67 [2024-01-31 17:03:36,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand