./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-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-queue-add-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-queue-add-2.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-queue-add-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 17:17:09,697 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:17:09,763 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:17:09,768 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:17:09,769 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:17:09,794 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:17:09,795 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:17:09,795 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:17:09,800 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:17:09,801 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:17:09,801 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:17:09,801 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:17:09,802 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:17:09,802 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:17:09,802 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:17:09,803 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:17:09,803 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:17:09,803 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:17:09,804 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:17:09,804 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:17:09,804 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:17:09,805 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:17:09,805 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:17:09,805 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:17:09,806 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:17:09,806 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:17:09,806 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:17:09,806 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:17:09,806 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:17:09,807 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:17:09,807 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:17:09,807 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:17:09,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:17:09,808 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:17:09,808 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:17:09,808 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:17:09,808 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:17:09,808 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:17:09,809 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:17:09,809 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:17:09,809 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:17:09,809 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:17:09,809 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:17:09,809 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:17:10,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:17:10,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:17:10,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:17:10,053 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:17:10,054 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:17:10,054 INFO L431 ainManager$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-queue-add-2.wvr.yml/witness.yml [2024-01-31 17:17:10,219 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:17:10,219 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:17:10,219 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2024-01-31 17:17:11,355 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:17:11,525 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:17:11,526 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2024-01-31 17:17:11,532 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2684711b/f4fecbbdda2e4c699a51a0d0870daf34/FLAGa02880f22 [2024-01-31 17:17:11,542 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2684711b/f4fecbbdda2e4c699a51a0d0870daf34 [2024-01-31 17:17:11,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:17:11,543 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:17:11,544 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:17:11,544 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:17:11,548 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:17:11,548 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:17:10" (1/2) ... [2024-01-31 17:17:11,549 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53591da and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:17:11, skipping insertion in model container [2024-01-31 17:17:11,549 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:17:10" (1/2) ... [2024-01-31 17:17:11,550 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@70093426 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:17:11, skipping insertion in model container [2024-01-31 17:17:11,550 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:17:11" (2/2) ... [2024-01-31 17:17:11,551 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53591da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:11, skipping insertion in model container [2024-01-31 17:17:11,551 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:17:11" (2/2) ... [2024-01-31 17:17:11,551 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:17:11,581 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 17:17:11,597 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:17:11,772 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-queue-add-2.wvr.c[2722,2735] [2024-01-31 17:17:11,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:17:11,787 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:17:11,802 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-queue-add-2.wvr.c[2722,2735] [2024-01-31 17:17:11,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:17:11,815 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:17:11,816 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:11 WrapperNode [2024-01-31 17:17:11,816 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:17:11,817 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:17:11,817 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:17:11,817 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:17:11,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:11" (1/1) ... [2024-01-31 17:17:11,837 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:11" (1/1) ... [2024-01-31 17:17:11,867 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 161 [2024-01-31 17:17:11,868 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:17:11,868 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:17:11,868 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:17:11,869 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:17:11,877 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:11" (1/1) ... [2024-01-31 17:17:11,877 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:11" (1/1) ... [2024-01-31 17:17:11,882 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:11" (1/1) ... [2024-01-31 17:17:11,896 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 4, 2]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-31 17:17:11,896 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:11" (1/1) ... [2024-01-31 17:17:11,897 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:11" (1/1) ... [2024-01-31 17:17:11,903 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:11" (1/1) ... [2024-01-31 17:17:11,911 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:11" (1/1) ... [2024-01-31 17:17:11,913 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:11" (1/1) ... [2024-01-31 17:17:11,914 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:11" (1/1) ... [2024-01-31 17:17:11,916 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:17:11,917 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:17:11,917 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:17:11,918 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:17:11,918 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:11" (1/1) ... [2024-01-31 17:17:11,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:17:11,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:11,948 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 17:17:11,950 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 17:17:11,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:17:11,976 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:17:11,976 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:17:11,976 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:17:11,976 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:17:11,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:17:11,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:17:11,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:17:11,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:17:11,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:17:11,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:17:11,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:17:11,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:17:11,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:17:11,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:17:11,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:17:11,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 17:17:11,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:17:11,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:17:11,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:17:11,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:17:11,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:17:11,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:17:11,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:17:11,980 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 17:17:12,082 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:17:12,084 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:17:12,279 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:17:12,280 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:17:12,465 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:17:12,465 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 17:17:12,467 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:17:12 BoogieIcfgContainer [2024-01-31 17:17:12,467 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:17:12,469 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:17:12,469 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:17:12,472 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:17:12,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:17:10" (1/4) ... [2024-01-31 17:17:12,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474dcdb9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:17:12, skipping insertion in model container [2024-01-31 17:17:12,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:17:11" (2/4) ... [2024-01-31 17:17:12,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474dcdb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:17:12, skipping insertion in model container [2024-01-31 17:17:12,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:11" (3/4) ... [2024-01-31 17:17:12,474 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474dcdb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:17:12, skipping insertion in model container [2024-01-31 17:17:12,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:17:12" (4/4) ... [2024-01-31 17:17:12,476 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2024-01-31 17:17:12,490 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:17:12,490 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:17:12,490 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:17:12,526 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 17:17:12,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 30 transitions, 74 flow [2024-01-31 17:17:12,600 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-01-31 17:17:12,601 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:17:12,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 28 events. 4/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-01-31 17:17:12,605 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 30 transitions, 74 flow [2024-01-31 17:17:12,607 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 66 flow [2024-01-31 17:17:12,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:17:12,627 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;@5715e2f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:17:12,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 17:17:12,644 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:17:12,645 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-01-31 17:17:12,645 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:17:12,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:12,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:12,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:17:12,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1463790779, now seen corresponding path program 1 times [2024-01-31 17:17:12,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:12,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177186644] [2024-01-31 17:17:12,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:12,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:12,900 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 17:17:12,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:12,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177186644] [2024-01-31 17:17:12,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177186644] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:17:12,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:17:12,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:17:12,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484306549] [2024-01-31 17:17:12,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:17:12,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-31 17:17:12,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:12,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-31 17:17:12,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-31 17:17:12,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-01-31 17:17:12,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 66 flow. Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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 17:17:12,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:12,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-01-31 17:17:12,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:13,021 INFO L124 PetriNetUnfolderBase]: 90/194 cut-off events. [2024-01-31 17:17:13,022 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-01-31 17:17:13,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 194 events. 90/194 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 681 event pairs, 69 based on Foata normal form. 14/191 useless extension candidates. Maximal degree in co-relation 317. Up to 153 conditions per place. [2024-01-31 17:17:13,028 INFO L140 encePairwiseOnDemand]: 29/30 looper letters, 20 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2024-01-31 17:17:13,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 104 flow [2024-01-31 17:17:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-31 17:17:13,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-31 17:17:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 37 transitions. [2024-01-31 17:17:13,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-01-31 17:17:13,040 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 66 flow. Second operand 2 states and 37 transitions. [2024-01-31 17:17:13,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 104 flow [2024-01-31 17:17:13,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 26 transitions, 96 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 17:17:13,047 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 56 flow [2024-01-31 17:17:13,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2024-01-31 17:17:13,051 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2024-01-31 17:17:13,052 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 56 flow [2024-01-31 17:17:13,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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 17:17:13,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:13,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:13,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:17:13,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:17:13,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:13,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1443539710, now seen corresponding path program 1 times [2024-01-31 17:17:13,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:13,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154881622] [2024-01-31 17:17:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:13,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:13,312 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 17:17:13,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:13,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154881622] [2024-01-31 17:17:13,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154881622] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:17:13,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:17:13,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:17:13,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238463751] [2024-01-31 17:17:13,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:17:13,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:17:13,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:13,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:17:13,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:17:13,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-01-31 17:17:13,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 17:17:13,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:13,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-01-31 17:17:13,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:13,409 INFO L124 PetriNetUnfolderBase]: 103/234 cut-off events. [2024-01-31 17:17:13,410 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 17:17:13,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 234 events. 103/234 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 877 event pairs, 82 based on Foata normal form. 17/235 useless extension candidates. Maximal degree in co-relation 430. Up to 153 conditions per place. [2024-01-31 17:17:13,414 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 19 selfloop transitions, 2 changer transitions 8/35 dead transitions. [2024-01-31 17:17:13,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 134 flow [2024-01-31 17:17:13,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:17:13,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:17:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-01-31 17:17:13,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-01-31 17:17:13,417 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 56 flow. Second operand 4 states and 64 transitions. [2024-01-31 17:17:13,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 134 flow [2024-01-31 17:17:13,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 17:17:13,422 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 74 flow [2024-01-31 17:17:13,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2024-01-31 17:17:13,423 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2024-01-31 17:17:13,427 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 74 flow [2024-01-31 17:17:13,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 17:17:13,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:13,427 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] [2024-01-31 17:17:13,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:17:13,428 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:17:13,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:13,428 INFO L85 PathProgramCache]: Analyzing trace with hash 727133890, now seen corresponding path program 1 times [2024-01-31 17:17:13,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:13,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639633916] [2024-01-31 17:17:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:13,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:17:13,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:13,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639633916] [2024-01-31 17:17:13,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639633916] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:17:13,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:17:13,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 17:17:13,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402670147] [2024-01-31 17:17:13,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:17:13,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:17:13,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:13,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:17:13,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:17:13,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-01-31 17:17:13,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 74 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 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 17:17:13,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:13,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-01-31 17:17:13,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:13,847 INFO L124 PetriNetUnfolderBase]: 242/472 cut-off events. [2024-01-31 17:17:13,847 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-01-31 17:17:13,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1025 conditions, 472 events. 242/472 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2147 event pairs, 67 based on Foata normal form. 1/469 useless extension candidates. Maximal degree in co-relation 1019. Up to 165 conditions per place. [2024-01-31 17:17:13,851 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 50 selfloop transitions, 9 changer transitions 8/71 dead transitions. [2024-01-31 17:17:13,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 71 transitions, 323 flow [2024-01-31 17:17:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:17:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:17:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-01-31 17:17:13,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-01-31 17:17:13,855 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 74 flow. Second operand 8 states and 115 transitions. [2024-01-31 17:17:13,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 71 transitions, 323 flow [2024-01-31 17:17:13,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 71 transitions, 319 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 17:17:13,858 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 128 flow [2024-01-31 17:17:13,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=128, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-01-31 17:17:13,859 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 11 predicate places. [2024-01-31 17:17:13,860 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 128 flow [2024-01-31 17:17:13,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 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 17:17:13,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:13,860 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] [2024-01-31 17:17:13,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:17:13,860 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:17:13,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:13,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2026291322, now seen corresponding path program 2 times [2024-01-31 17:17:13,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:13,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769883] [2024-01-31 17:17:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:13,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:17:13,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:13,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769883] [2024-01-31 17:17:13,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769883] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:17:13,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:17:13,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:17:13,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023444046] [2024-01-31 17:17:13,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:17:13,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:17:13,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:13,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:17:13,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:17:13,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-01-31 17:17:13,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 17:17:13,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:13,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-01-31 17:17:13,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:13,978 INFO L124 PetriNetUnfolderBase]: 152/342 cut-off events. [2024-01-31 17:17:13,978 INFO L125 PetriNetUnfolderBase]: For 192/196 co-relation queries the response was YES. [2024-01-31 17:17:13,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 342 events. 152/342 cut-off events. For 192/196 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1446 event pairs, 43 based on Foata normal form. 6/341 useless extension candidates. Maximal degree in co-relation 855. Up to 229 conditions per place. [2024-01-31 17:17:13,980 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 27 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-01-31 17:17:13,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 201 flow [2024-01-31 17:17:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:17:13,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:17:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-01-31 17:17:13,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-01-31 17:17:13,983 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 128 flow. Second operand 3 states and 52 transitions. [2024-01-31 17:17:13,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 201 flow [2024-01-31 17:17:13,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 191 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-31 17:17:13,985 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 137 flow [2024-01-31 17:17:13,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2024-01-31 17:17:13,987 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-01-31 17:17:13,987 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 137 flow [2024-01-31 17:17:13,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 17:17:13,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:13,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:13,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:17:13,988 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:17:13,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:13,989 INFO L85 PathProgramCache]: Analyzing trace with hash -427365064, now seen corresponding path program 1 times [2024-01-31 17:17:13,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:13,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941210507] [2024-01-31 17:17:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:13,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:14,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:14,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941210507] [2024-01-31 17:17:14,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941210507] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:14,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980762936] [2024-01-31 17:17:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:14,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:14,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:14,114 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 17:17:14,116 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 17:17:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:14,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:17:14,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:14,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:14,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980762936] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:14,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:14,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-01-31 17:17:14,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393992248] [2024-01-31 17:17:14,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:14,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:17:14,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:14,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:17:14,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:17:14,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-01-31 17:17:14,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 137 flow. Second operand has 12 states, 12 states have (on average 10.833333333333334) internal successors, (130), 12 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:17:14,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:14,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-01-31 17:17:14,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:14,501 INFO L124 PetriNetUnfolderBase]: 258/603 cut-off events. [2024-01-31 17:17:14,501 INFO L125 PetriNetUnfolderBase]: For 585/625 co-relation queries the response was YES. [2024-01-31 17:17:14,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611 conditions, 603 events. 258/603 cut-off events. For 585/625 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3112 event pairs, 146 based on Foata normal form. 26/602 useless extension candidates. Maximal degree in co-relation 1601. Up to 279 conditions per place. [2024-01-31 17:17:14,504 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 43 selfloop transitions, 5 changer transitions 4/61 dead transitions. [2024-01-31 17:17:14,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 335 flow [2024-01-31 17:17:14,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:17:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:17:14,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-01-31 17:17:14,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-01-31 17:17:14,505 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 137 flow. Second operand 6 states and 95 transitions. [2024-01-31 17:17:14,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 335 flow [2024-01-31 17:17:14,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 61 transitions, 314 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-01-31 17:17:14,508 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 165 flow [2024-01-31 17:17:14,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=165, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2024-01-31 17:17:14,508 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2024-01-31 17:17:14,509 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 165 flow [2024-01-31 17:17:14,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.833333333333334) internal successors, (130), 12 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:17:14,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:14,509 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] [2024-01-31 17:17:14,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 17:17:14,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:14,722 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:17:14,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:14,722 INFO L85 PathProgramCache]: Analyzing trace with hash -331753456, now seen corresponding path program 1 times [2024-01-31 17:17:14,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:14,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317569012] [2024-01-31 17:17:14,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:14,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:14,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:14,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317569012] [2024-01-31 17:17:14,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317569012] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:14,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925798267] [2024-01-31 17:17:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:14,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:14,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:14,851 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 17:17:14,880 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 17:17:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:14,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 17:17:14,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:14,969 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 17:17:14,969 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:17:14,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925798267] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:17:14,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 17:17:14,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-01-31 17:17:14,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673761481] [2024-01-31 17:17:14,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:17:14,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:17:14,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:14,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:17:14,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:17:14,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-01-31 17:17:14,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 165 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 17:17:14,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:14,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-01-31 17:17:14,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:15,052 INFO L124 PetriNetUnfolderBase]: 268/676 cut-off events. [2024-01-31 17:17:15,052 INFO L125 PetriNetUnfolderBase]: For 447/465 co-relation queries the response was YES. [2024-01-31 17:17:15,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1671 conditions, 676 events. 268/676 cut-off events. For 447/465 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3613 event pairs, 67 based on Foata normal form. 26/691 useless extension candidates. Maximal degree in co-relation 1659. Up to 180 conditions per place. [2024-01-31 17:17:15,055 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 47 selfloop transitions, 7 changer transitions 5/67 dead transitions. [2024-01-31 17:17:15,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 67 transitions, 373 flow [2024-01-31 17:17:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:17:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:17:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2024-01-31 17:17:15,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-01-31 17:17:15,056 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 165 flow. Second operand 4 states and 82 transitions. [2024-01-31 17:17:15,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 67 transitions, 373 flow [2024-01-31 17:17:15,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 67 transitions, 350 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-01-31 17:17:15,058 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 170 flow [2024-01-31 17:17:15,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2024-01-31 17:17:15,059 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 18 predicate places. [2024-01-31 17:17:15,059 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 170 flow [2024-01-31 17:17:15,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 17:17:15,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:15,059 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] [2024-01-31 17:17:15,079 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 17:17:15,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-31 17:17:15,271 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:17:15,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:15,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1090543624, now seen corresponding path program 2 times [2024-01-31 17:17:15,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:15,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531867412] [2024-01-31 17:17:15,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:15,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:15,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:15,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531867412] [2024-01-31 17:17:15,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531867412] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:15,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135309809] [2024-01-31 17:17:15,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:17:15,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:15,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:15,705 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 17:17:15,732 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 17:17:15,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:17:15,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:17:15,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 20 conjunts are in the unsatisfiable core [2024-01-31 17:17:15,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:15,962 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:17:15,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-01-31 17:17:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:15,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:16,104 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:17:16,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-01-31 17:17:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:16,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135309809] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:16,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:16,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2024-01-31 17:17:16,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771059661] [2024-01-31 17:17:16,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:16,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 17:17:16,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:16,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 17:17:16,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-01-31 17:17:16,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-01-31 17:17:16,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 170 flow. Second operand has 22 states, 22 states have (on average 8.545454545454545) internal successors, (188), 22 states have internal predecessors, (188), 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 17:17:16,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:16,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-01-31 17:17:16,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:17,340 INFO L124 PetriNetUnfolderBase]: 801/1656 cut-off events. [2024-01-31 17:17:17,340 INFO L125 PetriNetUnfolderBase]: For 1999/1999 co-relation queries the response was YES. [2024-01-31 17:17:17,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4519 conditions, 1656 events. 801/1656 cut-off events. For 1999/1999 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9928 event pairs, 74 based on Foata normal form. 88/1737 useless extension candidates. Maximal degree in co-relation 4506. Up to 316 conditions per place. [2024-01-31 17:17:17,347 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 155 selfloop transitions, 31 changer transitions 19/211 dead transitions. [2024-01-31 17:17:17,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 211 transitions, 1247 flow [2024-01-31 17:17:17,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 17:17:17,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 17:17:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 350 transitions. [2024-01-31 17:17:17,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-01-31 17:17:17,349 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 170 flow. Second operand 24 states and 350 transitions. [2024-01-31 17:17:17,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 211 transitions, 1247 flow [2024-01-31 17:17:17,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 211 transitions, 1179 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-01-31 17:17:17,353 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 468 flow [2024-01-31 17:17:17,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=468, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2024-01-31 17:17:17,354 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2024-01-31 17:17:17,354 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 468 flow [2024-01-31 17:17:17,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.545454545454545) internal successors, (188), 22 states have internal predecessors, (188), 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 17:17:17,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:17,355 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] [2024-01-31 17:17:17,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 17:17:17,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:17,566 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:17:17,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:17,566 INFO L85 PathProgramCache]: Analyzing trace with hash 559093608, now seen corresponding path program 3 times [2024-01-31 17:17:17,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:17,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262716570] [2024-01-31 17:17:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:17,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:17,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:17,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262716570] [2024-01-31 17:17:17,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262716570] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:17,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290678203] [2024-01-31 17:17:17,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:17:17,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:17,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:17,893 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:17:17,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 17:17:17,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:17:17,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:17:17,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 20 conjunts are in the unsatisfiable core [2024-01-31 17:17:17,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:18,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:18,246 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:17:18,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-01-31 17:17:18,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:18,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290678203] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:18,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:18,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-01-31 17:17:18,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776622844] [2024-01-31 17:17:18,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:18,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 17:17:18,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:18,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 17:17:18,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-01-31 17:17:18,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-01-31 17:17:18,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 468 flow. Second operand has 22 states, 22 states have (on average 8.681818181818182) internal successors, (191), 22 states have internal predecessors, (191), 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 17:17:18,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:18,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-01-31 17:17:18,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:19,302 INFO L124 PetriNetUnfolderBase]: 1209/2488 cut-off events. [2024-01-31 17:17:19,302 INFO L125 PetriNetUnfolderBase]: For 10193/10193 co-relation queries the response was YES. [2024-01-31 17:17:19,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8416 conditions, 2488 events. 1209/2488 cut-off events. For 10193/10193 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15903 event pairs, 126 based on Foata normal form. 86/2493 useless extension candidates. Maximal degree in co-relation 8392. Up to 596 conditions per place. [2024-01-31 17:17:19,318 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 145 selfloop transitions, 57 changer transitions 1/209 dead transitions. [2024-01-31 17:17:19,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 209 transitions, 1778 flow [2024-01-31 17:17:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:17:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:17:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 281 transitions. [2024-01-31 17:17:19,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49298245614035086 [2024-01-31 17:17:19,320 INFO L175 Difference]: Start difference. First operand has 78 places, 64 transitions, 468 flow. Second operand 19 states and 281 transitions. [2024-01-31 17:17:19,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 209 transitions, 1778 flow [2024-01-31 17:17:19,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 209 transitions, 1581 flow, removed 95 selfloop flow, removed 7 redundant places. [2024-01-31 17:17:19,337 INFO L231 Difference]: Finished difference. Result has 96 places, 94 transitions, 946 flow [2024-01-31 17:17:19,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=946, PETRI_PLACES=96, PETRI_TRANSITIONS=94} [2024-01-31 17:17:19,338 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2024-01-31 17:17:19,338 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 94 transitions, 946 flow [2024-01-31 17:17:19,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.681818181818182) internal successors, (191), 22 states have internal predecessors, (191), 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 17:17:19,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:19,338 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 17:17:19,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-31 17:17:19,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:19,550 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:17:19,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:19,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1800951130, now seen corresponding path program 4 times [2024-01-31 17:17:19,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:19,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509678709] [2024-01-31 17:17:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:19,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:20,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:20,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509678709] [2024-01-31 17:17:20,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509678709] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:20,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506849012] [2024-01-31 17:17:20,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:17:20,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:20,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:20,008 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:17:20,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 17:17:20,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:17:20,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:17:20,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:17:20,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:17:20,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:20,219 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:17:20,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-01-31 17:17:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:17:20,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506849012] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:20,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:20,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 15 [2024-01-31 17:17:20,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583673684] [2024-01-31 17:17:20,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:20,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:17:20,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:20,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:17:20,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-01-31 17:17:20,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-01-31 17:17:20,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 94 transitions, 946 flow. Second operand has 16 states, 16 states have (on average 8.875) internal successors, (142), 16 states have internal predecessors, (142), 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 17:17:20,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:20,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-01-31 17:17:20,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:20,805 INFO L124 PetriNetUnfolderBase]: 1382/2863 cut-off events. [2024-01-31 17:17:20,806 INFO L125 PetriNetUnfolderBase]: For 21797/21797 co-relation queries the response was YES. [2024-01-31 17:17:20,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11761 conditions, 2863 events. 1382/2863 cut-off events. For 21797/21797 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 18595 event pairs, 185 based on Foata normal form. 60/2919 useless extension candidates. Maximal degree in co-relation 11730. Up to 957 conditions per place. [2024-01-31 17:17:20,825 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 122 selfloop transitions, 51 changer transitions 0/179 dead transitions. [2024-01-31 17:17:20,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 179 transitions, 2007 flow [2024-01-31 17:17:20,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:17:20,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:17:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 169 transitions. [2024-01-31 17:17:20,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-01-31 17:17:20,827 INFO L175 Difference]: Start difference. First operand has 96 places, 94 transitions, 946 flow. Second operand 13 states and 169 transitions. [2024-01-31 17:17:20,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 179 transitions, 2007 flow [2024-01-31 17:17:20,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 179 transitions, 1774 flow, removed 108 selfloop flow, removed 7 redundant places. [2024-01-31 17:17:20,861 INFO L231 Difference]: Finished difference. Result has 102 places, 106 transitions, 1051 flow [2024-01-31 17:17:20,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1051, PETRI_PLACES=102, PETRI_TRANSITIONS=106} [2024-01-31 17:17:20,862 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2024-01-31 17:17:20,862 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 106 transitions, 1051 flow [2024-01-31 17:17:20,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 16 states have internal predecessors, (142), 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 17:17:20,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:20,862 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] [2024-01-31 17:17:20,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-31 17:17:21,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:21,073 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:17:21,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:21,074 INFO L85 PathProgramCache]: Analyzing trace with hash -292183380, now seen corresponding path program 1 times [2024-01-31 17:17:21,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:21,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877167246] [2024-01-31 17:17:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:21,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:21,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:21,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877167246] [2024-01-31 17:17:21,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877167246] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:21,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437696370] [2024-01-31 17:17:21,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:21,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:21,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:21,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:17:21,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 17:17:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:21,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:17:21,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:22,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:22,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:17:22,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-01-31 17:17:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:22,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437696370] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:22,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:22,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-01-31 17:17:22,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646760078] [2024-01-31 17:17:22,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:22,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-01-31 17:17:22,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:22,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-01-31 17:17:22,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2024-01-31 17:17:22,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-31 17:17:22,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 106 transitions, 1051 flow. Second operand has 42 states, 42 states have (on average 5.857142857142857) internal successors, (246), 42 states have internal predecessors, (246), 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 17:17:22,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:22,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-31 17:17:22,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:26,122 INFO L124 PetriNetUnfolderBase]: 3340/6276 cut-off events. [2024-01-31 17:17:26,122 INFO L125 PetriNetUnfolderBase]: For 42455/42455 co-relation queries the response was YES. [2024-01-31 17:17:26,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25303 conditions, 6276 events. 3340/6276 cut-off events. For 42455/42455 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 42289 event pairs, 305 based on Foata normal form. 6/6281 useless extension candidates. Maximal degree in co-relation 25271. Up to 2270 conditions per place. [2024-01-31 17:17:26,182 INFO L140 encePairwiseOnDemand]: 16/30 looper letters, 293 selfloop transitions, 156 changer transitions 51/502 dead transitions. [2024-01-31 17:17:26,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 502 transitions, 4760 flow [2024-01-31 17:17:26,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-01-31 17:17:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-01-31 17:17:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 528 transitions. [2024-01-31 17:17:26,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34509803921568627 [2024-01-31 17:17:26,187 INFO L175 Difference]: Start difference. First operand has 102 places, 106 transitions, 1051 flow. Second operand 51 states and 528 transitions. [2024-01-31 17:17:26,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 502 transitions, 4760 flow [2024-01-31 17:17:26,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 502 transitions, 4699 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-01-31 17:17:26,256 INFO L231 Difference]: Finished difference. Result has 167 places, 233 transitions, 2804 flow [2024-01-31 17:17:26,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=2804, PETRI_PLACES=167, PETRI_TRANSITIONS=233} [2024-01-31 17:17:26,257 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2024-01-31 17:17:26,257 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 233 transitions, 2804 flow [2024-01-31 17:17:26,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.857142857142857) internal successors, (246), 42 states have internal predecessors, (246), 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 17:17:26,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:26,257 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] [2024-01-31 17:17:26,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 17:17:26,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:26,469 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:17:26,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:26,470 INFO L85 PathProgramCache]: Analyzing trace with hash 74639994, now seen corresponding path program 2 times [2024-01-31 17:17:26,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:26,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593997298] [2024-01-31 17:17:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:26,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:27,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:27,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593997298] [2024-01-31 17:17:27,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593997298] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:27,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638087394] [2024-01-31 17:17:27,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:17:27,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:27,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:27,068 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:17:27,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 17:17:27,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:17:27,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:17:27,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 17:17:27,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:27,433 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:17:27,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2024-01-31 17:17:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:27,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:27,960 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:17:27,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2024-01-31 17:17:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:28,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638087394] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:28,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:28,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2024-01-31 17:17:28,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436490080] [2024-01-31 17:17:28,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:28,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-01-31 17:17:28,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:28,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-01-31 17:17:28,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1669, Unknown=0, NotChecked=0, Total=1892 [2024-01-31 17:17:28,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-31 17:17:28,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 233 transitions, 2804 flow. Second operand has 44 states, 44 states have (on average 5.704545454545454) internal successors, (251), 44 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:17:28,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:28,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-31 17:17:28,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:33,335 INFO L124 PetriNetUnfolderBase]: 3757/7202 cut-off events. [2024-01-31 17:17:33,336 INFO L125 PetriNetUnfolderBase]: For 64312/64312 co-relation queries the response was YES. [2024-01-31 17:17:33,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34165 conditions, 7202 events. 3757/7202 cut-off events. For 64312/64312 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 51344 event pairs, 187 based on Foata normal form. 4/7206 useless extension candidates. Maximal degree in co-relation 34115. Up to 2281 conditions per place. [2024-01-31 17:17:33,391 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 282 selfloop transitions, 410 changer transitions 53/747 dead transitions. [2024-01-31 17:17:33,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 747 transitions, 8340 flow [2024-01-31 17:17:33,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-01-31 17:17:33,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2024-01-31 17:17:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 686 transitions. [2024-01-31 17:17:33,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34129353233830845 [2024-01-31 17:17:33,394 INFO L175 Difference]: Start difference. First operand has 167 places, 233 transitions, 2804 flow. Second operand 67 states and 686 transitions. [2024-01-31 17:17:33,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 747 transitions, 8340 flow [2024-01-31 17:17:33,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 747 transitions, 8173 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-01-31 17:17:33,547 INFO L231 Difference]: Finished difference. Result has 245 places, 491 transitions, 7093 flow [2024-01-31 17:17:33,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2704, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=7093, PETRI_PLACES=245, PETRI_TRANSITIONS=491} [2024-01-31 17:17:33,548 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 215 predicate places. [2024-01-31 17:17:33,549 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 491 transitions, 7093 flow [2024-01-31 17:17:33,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.704545454545454) internal successors, (251), 44 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:17:33,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:33,549 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] [2024-01-31 17:17:33,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 17:17:33,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:33,777 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:17:33,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:33,778 INFO L85 PathProgramCache]: Analyzing trace with hash -648407578, now seen corresponding path program 3 times [2024-01-31 17:17:33,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:33,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330377606] [2024-01-31 17:17:33,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:33,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:34,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:34,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330377606] [2024-01-31 17:17:34,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330377606] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:34,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945641536] [2024-01-31 17:17:34,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:17:34,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:34,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:34,382 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:17:34,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 17:17:34,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:17:34,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:17:34,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:17:34,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:34,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-01-31 17:17:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:34,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:35,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:17:35,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-01-31 17:17:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:35,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945641536] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:35,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:35,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-01-31 17:17:35,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114485046] [2024-01-31 17:17:35,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:35,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-01-31 17:17:35,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:35,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-01-31 17:17:35,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2024-01-31 17:17:35,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-31 17:17:35,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 491 transitions, 7093 flow. Second operand has 42 states, 42 states have (on average 5.857142857142857) internal successors, (246), 42 states have internal predecessors, (246), 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 17:17:35,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:35,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-31 17:17:35,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:45,535 INFO L124 PetriNetUnfolderBase]: 7374/13853 cut-off events. [2024-01-31 17:17:45,536 INFO L125 PetriNetUnfolderBase]: For 217149/217149 co-relation queries the response was YES. [2024-01-31 17:17:45,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85689 conditions, 13853 events. 7374/13853 cut-off events. For 217149/217149 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 110383 event pairs, 371 based on Foata normal form. 14/13867 useless extension candidates. Maximal degree in co-relation 85613. Up to 2757 conditions per place. [2024-01-31 17:17:45,683 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 549 selfloop transitions, 983 changer transitions 125/1659 dead transitions. [2024-01-31 17:17:45,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1659 transitions, 25455 flow [2024-01-31 17:17:45,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2024-01-31 17:17:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2024-01-31 17:17:45,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 1328 transitions. [2024-01-31 17:17:45,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3405128205128205 [2024-01-31 17:17:45,687 INFO L175 Difference]: Start difference. First operand has 245 places, 491 transitions, 7093 flow. Second operand 130 states and 1328 transitions. [2024-01-31 17:17:45,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1659 transitions, 25455 flow [2024-01-31 17:17:46,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1659 transitions, 24251 flow, removed 550 selfloop flow, removed 19 redundant places. [2024-01-31 17:17:46,900 INFO L231 Difference]: Finished difference. Result has 397 places, 1158 transitions, 20557 flow [2024-01-31 17:17:46,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=6501, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=130, PETRI_FLOW=20557, PETRI_PLACES=397, PETRI_TRANSITIONS=1158} [2024-01-31 17:17:46,901 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 367 predicate places. [2024-01-31 17:17:46,901 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 1158 transitions, 20557 flow [2024-01-31 17:17:46,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.857142857142857) internal successors, (246), 42 states have internal predecessors, (246), 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 17:17:46,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:46,902 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] [2024-01-31 17:17:46,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 17:17:47,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-31 17:17:47,114 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:17:47,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:47,114 INFO L85 PathProgramCache]: Analyzing trace with hash 316511678, now seen corresponding path program 4 times [2024-01-31 17:17:47,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:47,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967712352] [2024-01-31 17:17:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:47,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:47,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:47,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967712352] [2024-01-31 17:17:47,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967712352] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:47,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349787941] [2024-01-31 17:17:47,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:17:47,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:47,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:47,705 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:17:47,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 17:17:47,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:17:47,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:17:47,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-31 17:17:47,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:48,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-01-31 17:17:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:48,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:48,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:17:48,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-01-31 17:17:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:48,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349787941] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:48,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:48,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-01-31 17:17:48,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638002103] [2024-01-31 17:17:48,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:48,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-01-31 17:17:48,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:48,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-01-31 17:17:48,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2024-01-31 17:17:48,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-31 17:17:48,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1158 transitions, 20557 flow. Second operand has 42 states, 42 states have (on average 5.857142857142857) internal successors, (246), 42 states have internal predecessors, (246), 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 17:17:48,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:48,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-31 17:17:48,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:56,840 INFO L124 PetriNetUnfolderBase]: 8107/15331 cut-off events. [2024-01-31 17:17:56,841 INFO L125 PetriNetUnfolderBase]: For 374453/374453 co-relation queries the response was YES. [2024-01-31 17:17:56,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112814 conditions, 15331 events. 8107/15331 cut-off events. For 374453/374453 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 124696 event pairs, 629 based on Foata normal form. 5/15336 useless extension candidates. Maximal degree in co-relation 112696. Up to 6509 conditions per place. [2024-01-31 17:17:57,038 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 711 selfloop transitions, 939 changer transitions 59/1711 dead transitions. [2024-01-31 17:17:57,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1711 transitions, 32266 flow [2024-01-31 17:17:57,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-01-31 17:17:57,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2024-01-31 17:17:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 704 transitions. [2024-01-31 17:17:57,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34009661835748795 [2024-01-31 17:17:57,046 INFO L175 Difference]: Start difference. First operand has 397 places, 1158 transitions, 20557 flow. Second operand 69 states and 704 transitions. [2024-01-31 17:17:57,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1711 transitions, 32266 flow [2024-01-31 17:18:01,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 1711 transitions, 28130 flow, removed 1967 selfloop flow, removed 32 redundant places. [2024-01-31 17:18:01,437 INFO L231 Difference]: Finished difference. Result has 445 places, 1365 transitions, 24694 flow [2024-01-31 17:18:01,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=17905, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=729, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=24694, PETRI_PLACES=445, PETRI_TRANSITIONS=1365} [2024-01-31 17:18:01,438 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 415 predicate places. [2024-01-31 17:18:01,438 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 1365 transitions, 24694 flow [2024-01-31 17:18:01,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.857142857142857) internal successors, (246), 42 states have internal predecessors, (246), 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 17:18:01,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:01,439 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] [2024-01-31 17:18:01,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-31 17:18:01,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-31 17:18:01,645 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:01,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:01,646 INFO L85 PathProgramCache]: Analyzing trace with hash -242718940, now seen corresponding path program 5 times [2024-01-31 17:18:01,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:01,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558553135] [2024-01-31 17:18:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:01,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:02,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:02,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558553135] [2024-01-31 17:18:02,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558553135] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:02,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599248016] [2024-01-31 17:18:02,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:18:02,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:02,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:02,157 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:02,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 17:18:02,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:18:02,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:18:02,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:18:02,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:02,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-01-31 17:18:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:02,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:02,836 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:18:02,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-01-31 17:18:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:03,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599248016] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:03,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:03,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-01-31 17:18:03,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426292186] [2024-01-31 17:18:03,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:03,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-01-31 17:18:03,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:03,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-01-31 17:18:03,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1497, Unknown=0, NotChecked=0, Total=1722 [2024-01-31 17:18:03,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-31 17:18:03,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1365 transitions, 24694 flow. Second operand has 42 states, 42 states have (on average 5.785714285714286) internal successors, (243), 42 states have internal predecessors, (243), 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 17:18:03,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:03,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-31 17:18:03,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:10,213 INFO L124 PetriNetUnfolderBase]: 8016/15195 cut-off events. [2024-01-31 17:18:10,214 INFO L125 PetriNetUnfolderBase]: For 367633/367633 co-relation queries the response was YES. [2024-01-31 17:18:10,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110387 conditions, 15195 events. 8016/15195 cut-off events. For 367633/367633 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 123706 event pairs, 786 based on Foata normal form. 2/15197 useless extension candidates. Maximal degree in co-relation 110262. Up to 8113 conditions per place. [2024-01-31 17:18:10,439 INFO L140 encePairwiseOnDemand]: 16/30 looper letters, 668 selfloop transitions, 794 changer transitions 54/1518 dead transitions. [2024-01-31 17:18:10,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 1518 transitions, 29696 flow [2024-01-31 17:18:10,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-31 17:18:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-31 17:18:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 323 transitions. [2024-01-31 17:18:10,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31666666666666665 [2024-01-31 17:18:10,442 INFO L175 Difference]: Start difference. First operand has 445 places, 1365 transitions, 24694 flow. Second operand 34 states and 323 transitions. [2024-01-31 17:18:10,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 1518 transitions, 29696 flow [2024-01-31 17:18:14,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 1518 transitions, 29418 flow, removed 81 selfloop flow, removed 26 redundant places. [2024-01-31 17:18:14,172 INFO L231 Difference]: Finished difference. Result has 447 places, 1371 transitions, 27775 flow [2024-01-31 17:18:14,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=24454, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=776, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=27775, PETRI_PLACES=447, PETRI_TRANSITIONS=1371} [2024-01-31 17:18:14,174 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 417 predicate places. [2024-01-31 17:18:14,174 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 1371 transitions, 27775 flow [2024-01-31 17:18:14,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.785714285714286) internal successors, (243), 42 states have internal predecessors, (243), 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 17:18:14,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:14,174 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-01-31 17:18:14,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 17:18:14,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-31 17:18:14,386 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:14,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:14,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1744640426, now seen corresponding path program 6 times [2024-01-31 17:18:14,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:14,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441769571] [2024-01-31 17:18:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:14,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:15,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:15,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441769571] [2024-01-31 17:18:15,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441769571] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:15,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234495524] [2024-01-31 17:18:15,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:18:15,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:15,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:15,127 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:15,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 17:18:15,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:18:15,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:18:15,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:18:15,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:18:15,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:15,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:18:15,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-01-31 17:18:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:18:15,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234495524] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:15,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:15,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2024-01-31 17:18:15,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824733603] [2024-01-31 17:18:15,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:15,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-01-31 17:18:15,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:15,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-01-31 17:18:15,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2024-01-31 17:18:15,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-31 17:18:15,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 1371 transitions, 27775 flow. Second operand has 36 states, 36 states have (on average 5.972222222222222) internal successors, (215), 36 states have internal predecessors, (215), 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 17:18:15,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:15,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-31 17:18:15,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:22,309 INFO L124 PetriNetUnfolderBase]: 8078/15187 cut-off events. [2024-01-31 17:18:22,309 INFO L125 PetriNetUnfolderBase]: For 450863/450863 co-relation queries the response was YES. [2024-01-31 17:18:22,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120642 conditions, 15187 events. 8078/15187 cut-off events. For 450863/450863 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 123209 event pairs, 805 based on Foata normal form. 1/15188 useless extension candidates. Maximal degree in co-relation 120507. Up to 7546 conditions per place. [2024-01-31 17:18:22,663 INFO L140 encePairwiseOnDemand]: 17/30 looper letters, 792 selfloop transitions, 770 changer transitions 23/1587 dead transitions. [2024-01-31 17:18:22,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1587 transitions, 34144 flow [2024-01-31 17:18:22,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 17:18:22,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 17:18:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 295 transitions. [2024-01-31 17:18:22,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-01-31 17:18:22,665 INFO L175 Difference]: Start difference. First operand has 447 places, 1371 transitions, 27775 flow. Second operand 28 states and 295 transitions. [2024-01-31 17:18:22,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1587 transitions, 34144 flow [2024-01-31 17:18:27,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1587 transitions, 33718 flow, removed 50 selfloop flow, removed 26 redundant places. [2024-01-31 17:18:27,255 INFO L231 Difference]: Finished difference. Result has 441 places, 1403 transitions, 30458 flow [2024-01-31 17:18:27,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=27398, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=734, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=30458, PETRI_PLACES=441, PETRI_TRANSITIONS=1403} [2024-01-31 17:18:27,256 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 411 predicate places. [2024-01-31 17:18:27,257 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 1403 transitions, 30458 flow [2024-01-31 17:18:27,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.972222222222222) internal successors, (215), 36 states have internal predecessors, (215), 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 17:18:27,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:27,257 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-01-31 17:18:27,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 17:18:27,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 17:18:27,468 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:27,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:27,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1337215424, now seen corresponding path program 7 times [2024-01-31 17:18:27,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:27,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791636762] [2024-01-31 17:18:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:27,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:28,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:28,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791636762] [2024-01-31 17:18:28,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791636762] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:28,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285416847] [2024-01-31 17:18:28,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:18:28,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:28,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:28,192 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:28,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 17:18:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:28,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:18:28,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:18:28,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:28,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:18:28,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-01-31 17:18:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:18:28,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285416847] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:28,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:28,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2024-01-31 17:18:28,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70548007] [2024-01-31 17:18:28,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:28,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-01-31 17:18:28,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:28,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-01-31 17:18:28,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2024-01-31 17:18:28,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-31 17:18:28,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 1403 transitions, 30458 flow. Second operand has 36 states, 36 states have (on average 5.916666666666667) internal successors, (213), 36 states have internal predecessors, (213), 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 17:18:28,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:28,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-31 17:18:28,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:35,619 INFO L124 PetriNetUnfolderBase]: 8030/15072 cut-off events. [2024-01-31 17:18:35,619 INFO L125 PetriNetUnfolderBase]: For 508277/508277 co-relation queries the response was YES. [2024-01-31 17:18:35,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125510 conditions, 15072 events. 8030/15072 cut-off events. For 508277/508277 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 121226 event pairs, 793 based on Foata normal form. 1/15073 useless extension candidates. Maximal degree in co-relation 125375. Up to 7265 conditions per place. [2024-01-31 17:18:35,990 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 680 selfloop transitions, 875 changer transitions 39/1596 dead transitions. [2024-01-31 17:18:35,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 1596 transitions, 36146 flow [2024-01-31 17:18:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 17:18:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 17:18:35,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 351 transitions. [2024-01-31 17:18:35,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342857142857143 [2024-01-31 17:18:35,992 INFO L175 Difference]: Start difference. First operand has 441 places, 1403 transitions, 30458 flow. Second operand 35 states and 351 transitions. [2024-01-31 17:18:35,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 1596 transitions, 36146 flow [2024-01-31 17:18:40,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 1596 transitions, 36076 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-01-31 17:18:40,636 INFO L231 Difference]: Finished difference. Result has 466 places, 1424 transitions, 32503 flow [2024-01-31 17:18:40,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=30392, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=848, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=32503, PETRI_PLACES=466, PETRI_TRANSITIONS=1424} [2024-01-31 17:18:40,638 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 436 predicate places. [2024-01-31 17:18:40,639 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 1424 transitions, 32503 flow [2024-01-31 17:18:40,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.916666666666667) internal successors, (213), 36 states have internal predecessors, (213), 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 17:18:40,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:40,639 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-01-31 17:18:40,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-01-31 17:18:40,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 17:18:40,856 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:40,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:40,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2066500202, now seen corresponding path program 8 times [2024-01-31 17:18:40,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:40,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585464008] [2024-01-31 17:18:40,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:40,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:41,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:41,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585464008] [2024-01-31 17:18:41,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585464008] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:41,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308232295] [2024-01-31 17:18:41,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:18:41,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:41,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:41,615 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:41,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-31 17:18:41,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:18:41,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:18:41,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 17:18:41,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:18:42,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:42,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:18:42,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2024-01-31 17:18:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:18:42,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308232295] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:42,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:42,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 11] total 37 [2024-01-31 17:18:42,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551695573] [2024-01-31 17:18:42,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:42,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 17:18:42,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:42,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 17:18:42,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 17:18:42,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-31 17:18:42,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 1424 transitions, 32503 flow. Second operand has 38 states, 38 states have (on average 5.815789473684211) internal successors, (221), 38 states have internal predecessors, (221), 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 17:18:42,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:42,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-31 17:18:42,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:49,274 INFO L124 PetriNetUnfolderBase]: 8194/15412 cut-off events. [2024-01-31 17:18:49,275 INFO L125 PetriNetUnfolderBase]: For 557577/557577 co-relation queries the response was YES. [2024-01-31 17:18:49,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132540 conditions, 15412 events. 8194/15412 cut-off events. For 557577/557577 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 125456 event pairs, 606 based on Foata normal form. 1/15413 useless extension candidates. Maximal degree in co-relation 132407. Up to 7745 conditions per place. [2024-01-31 17:18:49,480 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 717 selfloop transitions, 818 changer transitions 56/1593 dead transitions. [2024-01-31 17:18:49,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1593 transitions, 37867 flow [2024-01-31 17:18:49,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 17:18:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 17:18:49,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 296 transitions. [2024-01-31 17:18:49,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3288888888888889 [2024-01-31 17:18:49,493 INFO L175 Difference]: Start difference. First operand has 466 places, 1424 transitions, 32503 flow. Second operand 30 states and 296 transitions. [2024-01-31 17:18:49,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1593 transitions, 37867 flow [2024-01-31 17:18:53,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 1593 transitions, 37249 flow, removed 36 selfloop flow, removed 19 redundant places. [2024-01-31 17:18:53,817 INFO L231 Difference]: Finished difference. Result has 478 places, 1441 transitions, 35358 flow [2024-01-31 17:18:53,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=31923, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=801, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=35358, PETRI_PLACES=478, PETRI_TRANSITIONS=1441} [2024-01-31 17:18:53,818 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 448 predicate places. [2024-01-31 17:18:53,818 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 1441 transitions, 35358 flow [2024-01-31 17:18:53,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.815789473684211) internal successors, (221), 38 states have internal predecessors, (221), 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 17:18:53,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:53,819 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-01-31 17:18:53,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-31 17:18:54,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-31 17:18:54,043 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:54,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:54,044 INFO L85 PathProgramCache]: Analyzing trace with hash 792878098, now seen corresponding path program 9 times [2024-01-31 17:18:54,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:54,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818535699] [2024-01-31 17:18:54,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:54,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:54,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:54,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818535699] [2024-01-31 17:18:54,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818535699] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:54,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96043658] [2024-01-31 17:18:54,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:18:54,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:54,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:54,752 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:54,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 17:18:54,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:18:54,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:18:54,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2024-01-31 17:18:54,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:18:55,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:55,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:18:55,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2024-01-31 17:18:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:18:55,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96043658] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:55,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:55,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 34 [2024-01-31 17:18:55,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542942505] [2024-01-31 17:18:55,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:55,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-31 17:18:55,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:55,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-31 17:18:55,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2024-01-31 17:18:55,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-31 17:18:55,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 1441 transitions, 35358 flow. Second operand has 35 states, 35 states have (on average 5.857142857142857) internal successors, (205), 35 states have internal predecessors, (205), 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 17:18:55,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:55,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-31 17:18:55,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:19:02,874 INFO L124 PetriNetUnfolderBase]: 8580/16130 cut-off events. [2024-01-31 17:19:02,875 INFO L125 PetriNetUnfolderBase]: For 683336/683336 co-relation queries the response was YES. [2024-01-31 17:19:03,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147316 conditions, 16130 events. 8580/16130 cut-off events. For 683336/683336 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 131518 event pairs, 614 based on Foata normal form. 1/16131 useless extension candidates. Maximal degree in co-relation 147175. Up to 7084 conditions per place. [2024-01-31 17:19:03,237 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 777 selfloop transitions, 905 changer transitions 34/1718 dead transitions. [2024-01-31 17:19:03,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 1718 transitions, 44075 flow [2024-01-31 17:19:03,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 17:19:03,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 17:19:03,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 293 transitions. [2024-01-31 17:19:03,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32555555555555554 [2024-01-31 17:19:03,239 INFO L175 Difference]: Start difference. First operand has 478 places, 1441 transitions, 35358 flow. Second operand 30 states and 293 transitions. [2024-01-31 17:19:03,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 1718 transitions, 44075 flow [2024-01-31 17:19:08,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 1718 transitions, 43960 flow, removed 18 selfloop flow, removed 19 redundant places. [2024-01-31 17:19:08,499 INFO L231 Difference]: Finished difference. Result has 488 places, 1547 transitions, 40922 flow [2024-01-31 17:19:08,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=35257, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=804, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=40922, PETRI_PLACES=488, PETRI_TRANSITIONS=1547} [2024-01-31 17:19:08,501 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 458 predicate places. [2024-01-31 17:19:08,501 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 1547 transitions, 40922 flow [2024-01-31 17:19:08,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.857142857142857) internal successors, (205), 35 states have internal predecessors, (205), 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 17:19:08,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:19:08,501 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-01-31 17:19:08,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-31 17:19:08,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:19:08,708 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:19:08,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:19:08,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1667310728, now seen corresponding path program 10 times [2024-01-31 17:19:08,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:19:08,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356786719] [2024-01-31 17:19:08,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:19:08,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:19:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:19:08,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:19:08,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356786719] [2024-01-31 17:19:08,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356786719] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:19:08,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094505339] [2024-01-31 17:19:08,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:19:08,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:19:08,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:19:08,793 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:19:08,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 17:19:08,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:19:08,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:19:08,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:19:08,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:19:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:19:08,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:19:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:19:09,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094505339] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:19:09,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:19:09,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-01-31 17:19:09,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519050639] [2024-01-31 17:19:09,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:19:09,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:19:09,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:19:09,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:19:09,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:19:09,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-01-31 17:19:09,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 1547 transitions, 40922 flow. Second operand has 18 states, 18 states have (on average 10.5) internal successors, (189), 18 states have internal predecessors, (189), 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 17:19:09,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:19:09,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-01-31 17:19:09,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:19:10,829 INFO L124 PetriNetUnfolderBase]: 1682/3741 cut-off events. [2024-01-31 17:19:10,829 INFO L125 PetriNetUnfolderBase]: For 188308/188538 co-relation queries the response was YES. [2024-01-31 17:19:10,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38333 conditions, 3741 events. 1682/3741 cut-off events. For 188308/188538 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 27748 event pairs, 525 based on Foata normal form. 307/4013 useless extension candidates. Maximal degree in co-relation 38188. Up to 1796 conditions per place. [2024-01-31 17:19:10,885 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 211 selfloop transitions, 7 changer transitions 175/495 dead transitions. [2024-01-31 17:19:10,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 495 transitions, 13032 flow [2024-01-31 17:19:10,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:19:10,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:19:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-01-31 17:19:10,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-01-31 17:19:10,886 INFO L175 Difference]: Start difference. First operand has 488 places, 1547 transitions, 40922 flow. Second operand 8 states and 118 transitions. [2024-01-31 17:19:10,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 495 transitions, 13032 flow [2024-01-31 17:19:11,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 495 transitions, 11055 flow, removed 225 selfloop flow, removed 93 redundant places. [2024-01-31 17:19:11,453 INFO L231 Difference]: Finished difference. Result has 308 places, 303 transitions, 6659 flow [2024-01-31 17:19:11,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=10212, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6659, PETRI_PLACES=308, PETRI_TRANSITIONS=303} [2024-01-31 17:19:11,454 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 278 predicate places. [2024-01-31 17:19:11,454 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 303 transitions, 6659 flow [2024-01-31 17:19:11,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.5) internal successors, (189), 18 states have internal predecessors, (189), 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 17:19:11,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:19:11,455 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-01-31 17:19:11,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 17:19:11,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:19:11,666 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:19:11,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:19:11,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1640605518, now seen corresponding path program 11 times [2024-01-31 17:19:11,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:19:11,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491134369] [2024-01-31 17:19:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:19:11,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:19:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:19:12,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:19:12,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491134369] [2024-01-31 17:19:12,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491134369] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:19:12,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763203955] [2024-01-31 17:19:12,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:19:12,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:19:12,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:19:12,104 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:19:12,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-31 17:19:12,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:19:12,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:19:12,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 17:19:12,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:19:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:19:12,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:19:12,555 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-31 17:19:12,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2024-01-31 17:19:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:19:12,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763203955] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:19:12,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:19:12,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-31 17:19:12,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903918118] [2024-01-31 17:19:12,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:19:12,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 17:19:12,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:19:12,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 17:19:12,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2024-01-31 17:19:12,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-01-31 17:19:12,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 303 transitions, 6659 flow. Second operand has 31 states, 31 states have (on average 8.387096774193548) internal successors, (260), 31 states have internal predecessors, (260), 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 17:19:12,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:19:12,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-01-31 17:19:12,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:19:16,889 INFO L124 PetriNetUnfolderBase]: 5656/10902 cut-off events. [2024-01-31 17:19:16,889 INFO L125 PetriNetUnfolderBase]: For 367345/367611 co-relation queries the response was YES. [2024-01-31 17:19:16,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95607 conditions, 10902 events. 5656/10902 cut-off events. For 367345/367611 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 78725 event pairs, 349 based on Foata normal form. 463/11326 useless extension candidates. Maximal degree in co-relation 95524. Up to 2389 conditions per place. [2024-01-31 17:19:17,265 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 1019 selfloop transitions, 555 changer transitions 4/1642 dead transitions. [2024-01-31 17:19:17,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 1642 transitions, 36495 flow [2024-01-31 17:19:17,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-01-31 17:19:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-01-31 17:19:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 894 transitions. [2024-01-31 17:19:17,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5321428571428571 [2024-01-31 17:19:17,281 INFO L175 Difference]: Start difference. First operand has 308 places, 303 transitions, 6659 flow. Second operand 56 states and 894 transitions. [2024-01-31 17:19:17,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 1642 transitions, 36495 flow [2024-01-31 17:19:18,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1642 transitions, 33357 flow, removed 662 selfloop flow, removed 31 redundant places. [2024-01-31 17:19:18,017 INFO L231 Difference]: Finished difference. Result has 319 places, 828 transitions, 21061 flow [2024-01-31 17:19:18,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=6098, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=21061, PETRI_PLACES=319, PETRI_TRANSITIONS=828} [2024-01-31 17:19:18,018 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 289 predicate places. [2024-01-31 17:19:18,018 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 828 transitions, 21061 flow [2024-01-31 17:19:18,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.387096774193548) internal successors, (260), 31 states have internal predecessors, (260), 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 17:19:18,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:19:18,018 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:19:18,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-31 17:19:18,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:19:18,223 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:19:18,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:19:18,224 INFO L85 PathProgramCache]: Analyzing trace with hash -870039930, now seen corresponding path program 12 times [2024-01-31 17:19:18,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:19:18,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766843743] [2024-01-31 17:19:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:19:18,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:19:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:19:18,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:19:18,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766843743] [2024-01-31 17:19:18,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766843743] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:19:18,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249020649] [2024-01-31 17:19:18,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:19:18,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:19:18,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:19:18,329 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:19:18,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-31 17:19:18,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:19:18,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:19:18,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:19:18,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:19:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:19:18,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:19:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:19:18,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249020649] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:19:18,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:19:18,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2024-01-31 17:19:18,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938657430] [2024-01-31 17:19:18,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:19:18,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 17:19:18,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:19:18,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 17:19:18,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2024-01-31 17:19:18,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-01-31 17:19:18,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 828 transitions, 21061 flow. Second operand has 20 states, 20 states have (on average 10.25) internal successors, (205), 20 states have internal predecessors, (205), 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 17:19:18,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:19:18,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-01-31 17:19:18,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:19:21,452 INFO L124 PetriNetUnfolderBase]: 4777/9812 cut-off events. [2024-01-31 17:19:21,452 INFO L125 PetriNetUnfolderBase]: For 552463/552714 co-relation queries the response was YES. [2024-01-31 17:19:21,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99241 conditions, 9812 events. 4777/9812 cut-off events. For 552463/552714 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 74414 event pairs, 590 based on Foata normal form. 32/9737 useless extension candidates. Maximal degree in co-relation 99127. Up to 6196 conditions per place. [2024-01-31 17:19:21,790 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 582 selfloop transitions, 8 changer transitions 37/848 dead transitions. [2024-01-31 17:19:21,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 848 transitions, 22335 flow [2024-01-31 17:19:21,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 17:19:21,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 17:19:21,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-01-31 17:19:21,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45666666666666667 [2024-01-31 17:19:21,791 INFO L175 Difference]: Start difference. First operand has 319 places, 828 transitions, 21061 flow. Second operand 10 states and 137 transitions. [2024-01-31 17:19:21,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 848 transitions, 22335 flow [2024-01-31 17:19:23,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 848 transitions, 20559 flow, removed 759 selfloop flow, removed 9 redundant places. [2024-01-31 17:19:23,892 INFO L231 Difference]: Finished difference. Result has 319 places, 807 transitions, 18960 flow [2024-01-31 17:19:23,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=19172, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18960, PETRI_PLACES=319, PETRI_TRANSITIONS=807} [2024-01-31 17:19:23,893 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 289 predicate places. [2024-01-31 17:19:23,893 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 807 transitions, 18960 flow [2024-01-31 17:19:23,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.25) internal successors, (205), 20 states have internal predecessors, (205), 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 17:19:23,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:19:23,893 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:19:23,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-01-31 17:19:24,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:19:24,098 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:19:24,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:19:24,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1072232308, now seen corresponding path program 13 times [2024-01-31 17:19:24,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:19:24,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543443088] [2024-01-31 17:19:24,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:19:24,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:19:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:19:24,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:19:24,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543443088] [2024-01-31 17:19:24,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543443088] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:19:24,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353062104] [2024-01-31 17:19:24,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:19:24,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:19:24,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:19:24,176 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:19:24,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-31 17:19:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:24,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:19:24,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:19:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:19:24,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:19:24,417 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:19:24,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353062104] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:19:24,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:19:24,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2024-01-31 17:19:24,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752435024] [2024-01-31 17:19:24,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:19:24,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 17:19:24,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:19:24,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 17:19:24,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-01-31 17:19:24,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-01-31 17:19:24,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 807 transitions, 18960 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 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 17:19:24,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:19:24,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-01-31 17:19:24,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:19:27,714 INFO L124 PetriNetUnfolderBase]: 6084/12446 cut-off events. [2024-01-31 17:19:27,714 INFO L125 PetriNetUnfolderBase]: For 669902/670185 co-relation queries the response was YES. [2024-01-31 17:19:27,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122504 conditions, 12446 events. 6084/12446 cut-off events. For 669902/670185 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 99240 event pairs, 595 based on Foata normal form. 112/12448 useless extension candidates. Maximal degree in co-relation 122392. Up to 4918 conditions per place. [2024-01-31 17:19:28,031 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 544 selfloop transitions, 262 changer transitions 16/1035 dead transitions. [2024-01-31 17:19:28,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 1035 transitions, 24508 flow [2024-01-31 17:19:28,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:19:28,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:19:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-01-31 17:19:28,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-01-31 17:19:28,033 INFO L175 Difference]: Start difference. First operand has 319 places, 807 transitions, 18960 flow. Second operand 5 states and 105 transitions. [2024-01-31 17:19:28,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 1035 transitions, 24508 flow [2024-01-31 17:19:30,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 1035 transitions, 23920 flow, removed 198 selfloop flow, removed 14 redundant places. [2024-01-31 17:19:30,664 INFO L231 Difference]: Finished difference. Result has 292 places, 940 transitions, 22367 flow [2024-01-31 17:19:30,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=18430, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=22367, PETRI_PLACES=292, PETRI_TRANSITIONS=940} [2024-01-31 17:19:30,665 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 262 predicate places. [2024-01-31 17:19:30,665 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 940 transitions, 22367 flow [2024-01-31 17:19:30,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 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 17:19:30,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:19:30,666 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 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] [2024-01-31 17:19:30,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-31 17:19:30,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:19:30,880 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:19:30,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:19:30,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2038591086, now seen corresponding path program 14 times [2024-01-31 17:19:30,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:19:30,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552057310] [2024-01-31 17:19:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:19:30,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:19:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:19:31,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:19:31,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552057310] [2024-01-31 17:19:31,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552057310] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:19:31,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880224799] [2024-01-31 17:19:31,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:19:31,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:19:31,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:19:31,452 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:19:31,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-31 17:19:31,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:19:31,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:19:31,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-31 17:19:31,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:19:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:19:31,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:19:31,748 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-31 17:19:31,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2024-01-31 17:19:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 17:19:31,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880224799] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:19:31,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:19:31,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 22 [2024-01-31 17:19:31,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679293249] [2024-01-31 17:19:31,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:19:31,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 17:19:31,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:19:31,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 17:19:31,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2024-01-31 17:19:31,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-01-31 17:19:31,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 940 transitions, 22367 flow. Second operand has 23 states, 23 states have (on average 8.782608695652174) internal successors, (202), 23 states have internal predecessors, (202), 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 17:19:31,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:19:31,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-01-31 17:19:31,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand